[{"id":"sun","name":"Sun","aliases":["Sol"],"attributes":{"type":"Star","location":"Solar System","distance":0.00001581,"mass":1.988e+30,"radius":695700,"discovered":"Always visible"},"clues":{"facts":["It holds about 99.8% of all the mass in its system.","Its light takes about 8 minutes to reach us.","It is the yellow-white star we see every day."]},"image":"assets/objects/sun.jpg","imageCredit":"Matúš Motlo, CC BY-SA 4.0 (Wikimedia Commons)"},{"id":"mercury","name":"Mercury","attributes":{"type":"Planet","location":"Solar System","distance":0.00001641,"mass":3.301e+23,"radius":2440,"discovered":"Always visible"},"clues":{"facts":["A year here lasts just 88 Earth days.","With almost no atmosphere, it swings from about 430 °C by day to −180 °C at night.","It is the smallest planet and the closest one to the Sun."]},"image":"assets/objects/mercury.jpg","imageCredit":"NASA/Johns Hopkins University Applied Physics Laboratory/Arizona State University/Carnegie Institution of Washington, Public domain (Wikimedia Commons)"},{"id":"venus","name":"Venus","attributes":{"type":"Planet","location":"Solar System","distance":0.00001796,"mass":4.868e+24,"radius":6052,"discovered":"Always visible"},"clues":{"facts":["A day here is longer than its year.","Its thick carbon-dioxide atmosphere makes it the hottest planet, around 465 °C.","Often called Earth's twin, it shines as the bright 'morning star' or 'evening star'."]},"image":"assets/objects/venus.jpg","imageCredit":"NASA/JPL-Caltech, Public domain (Wikimedia Commons)"},{"id":"earth","name":"Earth","aliases":["The Earth","Terra"],"attributes":{"type":"Planet","location":"Solar System","distance":0,"mass":5.972e+24,"radius":6371,"discovered":"Always visible"},"clues":{"facts":["It is the densest planet in its system.","About 71% of its surface is covered by liquid water.","It is the only world known to host life — you are standing on it."]},"image":"assets/objects/earth.jpg","imageCredit":"NASA/Apollo 17 crew; taken by either Harrison Schmitt or Ron Evans, Public domain (Wikimedia Commons)"},{"id":"mars","name":"Mars","attributes":{"type":"Planet","location":"Solar System","distance":0.00002677,"mass":6.417e+23,"radius":3390,"discovered":"Always visible"},"clues":{"facts":["It has two small, potato-shaped moons.","It hosts Olympus Mons, the tallest volcano known in the Solar System.","Iron-oxide dust gives it a rusty red colour."]},"image":"assets/objects/mars.jpg","imageCredit":"Kevin Gill from Los Angeles, CA, United States, CC BY 2.0 (Wikimedia Commons)"},{"id":"jupiter","name":"Jupiter","attributes":{"type":"Planet","location":"Solar System","distance":0.00008303,"mass":1.898e+27,"radius":69910,"discovered":"Always visible"},"clues":{"facts":["It spins faster than any other planet: a day lasts under 10 hours.","It is more than twice as massive as all the other planets combined.","Its Great Red Spot is a storm bigger than Earth."]},"image":"assets/objects/jupiter.jpg","imageCredit":"NASA/STSCI (S.T.A.R.S), Public domain (Wikimedia Commons)"},{"id":"saturn","name":"Saturn","attributes":{"type":"Planet","location":"Solar System","distance":0.0001512,"mass":5.683e+26,"radius":58230,"discovered":"Always visible"},"clues":{"facts":["On average it is less dense than water.","It has more known moons than any other planet (over 250).","It is famous for its bright, wide ring system."]},"image":"assets/objects/saturn.jpg","imageCredit":"NASA / JPL-Caltech / SSI / color composite by Gordan Ugarkovic, Public domain (Wikimedia Commons)"},{"id":"uranus","name":"Uranus","attributes":{"type":"Planet","location":"Solar System","distance":0.0003036,"mass":8.681e+25,"radius":25360,"discovered":"1700s"},"clues":{"facts":["It was the first planet discovered with a telescope.","It holds the coldest temperature measured on any planet, about −224 °C.","It rolls around the Sun tipped on its side, with an axial tilt of about 98°."]},"image":"assets/objects/uranus.jpg","imageCredit":"Ardenau4, CC0 (Wikimedia Commons)"},{"id":"neptune","name":"Neptune","attributes":{"type":"Planet","location":"Solar System","distance":0.0004756,"mass":1.024e+26,"radius":24620,"discovered":"1800s"},"clues":{"facts":["It was found by mathematical prediction before anyone saw it.","It has the fastest winds in the Solar System, over 2,000 km/h.","It is the farthest planet from the Sun, a deep blue ice giant."]},"image":"assets/objects/neptune.jpg","imageCredit":"NASA / Voyager 2 / PDS / OPUS / Ardenau4, CC0 (Wikimedia Commons)"},{"id":"ceres","name":"Ceres","aliases":["1 Ceres"],"attributes":{"type":"Dwarf planet","location":"Solar System","distance":0.00004524,"mass":938400000000000000000,"radius":469.7,"discovered":"1800s"},"clues":{"facts":["It was counted as a planet for about half a century after its discovery.","NASA's Dawn spacecraft found bright salt deposits in its Occator crater.","It is the largest object in the asteroid belt."]},"image":"assets/objects/ceres.jpg","imageCredit":"Justin Cowart, Public domain (Wikimedia Commons)"},{"id":"pluto","name":"Pluto","aliases":["134340 Pluto"],"attributes":{"type":"Dwarf planet","location":"Solar System","distance":0.0006244,"mass":1.303e+22,"radius":1188,"discovered":"1900–1949"},"clues":{"facts":["A spacecraft flyby in 2015 revealed a huge heart-shaped plain.","Its biggest moon is so large that the pair orbit a point between them.","It was called the ninth planet until it was reclassified in 2006."]},"image":"assets/objects/pluto.jpg","imageCredit":"NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute/Alex Parker, Public domain (Wikimedia Commons)"},{"id":"eris","name":"Eris","aliases":["136199 Eris"],"attributes":{"type":"Dwarf planet","location":"Solar System","distance":0.001073,"mass":1.647e+22,"radius":1163,"discovered":"2000s"},"clues":{"facts":["It is almost exactly as wide as the most famous dwarf planet, but more massive.","Its discovery set off the 2006 debate over what counts as a planet.","It is named after the Greek goddess of strife and discord."]},"image":"assets/objects/eris.jpg","imageCredit":"NASA/ESA/CSA JWST NIRCam; Ana Carolina de Souza Feliciano et al. & Melina Thévenot, CC BY-SA 4.0 (Wikimedia Commons)"},{"id":"haumea","name":"Haumea","aliases":["136108 Haumea"],"attributes":{"type":"Dwarf planet","location":"Solar System","distance":0.0006816,"mass":4.006e+21,"radius":798,"discovered":"2000s"},"clues":{"facts":["It spins once every 4 hours, one of the fastest of any large body.","Its fast spin stretched it into an egg-like shape, and it has a ring.","It is named after a Hawaiian goddess of childbirth."]},"image":"assets/objects/haumea.jpg","imageCredit":"Renerpho, Public domain (Wikimedia Commons)"},{"id":"makemake","name":"Makemake","aliases":["136472 Makemake"],"attributes":{"type":"Dwarf planet","location":"Solar System","distance":0.000718,"mass":3.1e+21,"radius":715,"discovered":"2000s"},"clues":{"facts":["It is a bright, reddish world in the Kuiper Belt beyond Neptune.","It was found just after Easter 2005 and nicknamed 'Easterbunny'.","It is named after the creator god of the Rapa Nui people of Easter Island."]},"image":"assets/objects/makemake.jpg","imageCredit":"NASA, ESA, and A. Parker and M. Buie (Southwest Research Institute), CC BY 4.0 (Wikimedia Commons)"},{"id":"moon","name":"Moon","aliases":["The Moon","Luna"],"attributes":{"type":"Moon","location":"Solar System","distance":4.063e-8,"mass":7.342e+22,"radius":1737,"discovered":"Always visible"},"clues":{"facts":["It always shows the same face to us.","Twelve astronauts walked on it between 1969 and 1972.","It is Earth's only natural satellite."]},"image":"assets/objects/moon.jpg","imageCredit":"Gregory H. Revera, CC BY-SA 3.0 (Wikimedia Commons)"},{"id":"phobos","name":"Phobos","attributes":{"type":"Moon","location":"Solar System","distance":0.00002677,"mass":10660000000000000,"radius":11.08,"discovered":"1800s"},"clues":{"facts":["It orbits its planet three times a day.","It is slowly spiralling inward and should break up in about 50 million years.","It is the larger of the two moons of Mars."]},"image":"assets/objects/phobos.jpg","imageCredit":"NASA / JPL-Caltech / University of Arizona, Public domain (Wikimedia Commons)"},{"id":"deimos","name":"Deimos","attributes":{"type":"Moon","location":"Solar System","distance":0.00002677,"mass":1476000000000000,"radius":6.2,"discovered":"1800s"},"clues":{"facts":["It is one of the smallest moons in the inner Solar System.","From the surface of its planet it would look like a bright star.","It is the smaller, outer moon of Mars; its name means 'dread'."]},"image":"assets/objects/deimos.jpg","imageCredit":"NASA/JPL/University of Arizona, Public domain (Wikimedia Commons)"},{"id":"io","name":"Io","attributes":{"type":"Moon","location":"Solar System","distance":0.00008303,"mass":8.932e+22,"radius":1822,"discovered":"1600s"},"clues":{"facts":["It is the most volcanically active body in the Solar System.","Tidal squeezing by its giant planet heats its interior.","It is the innermost of Jupiter's four Galilean moons."]},"image":"assets/objects/io.jpg","imageCredit":"NASA, Public domain (Wikimedia Commons)"},{"id":"europa","name":"Europa","attributes":{"type":"Moon","location":"Solar System","distance":0.00008303,"mass":4.8e+22,"radius":1561,"discovered":"1600s"},"clues":{"facts":["Scientists think a salty ocean lies under its icy shell.","It is a top target in the search for life; NASA's Clipper probe is on its way.","It is the smallest of Jupiter's four Galilean moons."]},"image":"assets/objects/europa.jpg","imageCredit":"NASA/JPL-Caltech/SwRI/MSSS/Kevin M. Gill, CC BY 2.0 (Wikimedia Commons)"},{"id":"ganymede","name":"Ganymede","attributes":{"type":"Moon","location":"Solar System","distance":0.00008303,"mass":1.482e+23,"radius":2634,"discovered":"1600s"},"clues":{"facts":["It is bigger than the planet Mercury.","It is the only moon known to have its own magnetic field.","It is the largest moon in the Solar System, orbiting Jupiter."]},"image":"assets/objects/ganymede.jpg","imageCredit":"NASA/JPL-Caltech/SwRI/MSSS/Kevin M. Gill, CC BY 2.0 (Wikimedia Commons)"},{"id":"callisto","name":"Callisto","attributes":{"type":"Moon","location":"Solar System","distance":0.00008303,"mass":1.076e+23,"radius":2410,"discovered":"1600s"},"clues":{"facts":["Its surface is one of the most heavily cratered in the Solar System.","It is the third-largest moon in the Solar System.","It is the outermost of Jupiter's four Galilean moons."]},"image":"assets/objects/callisto.jpg","imageCredit":"zelario12, CC BY-SA 2.0 (Wikimedia Commons)"},{"id":"titan","name":"Titan","attributes":{"type":"Moon","location":"Solar System","distance":0.0001512,"mass":1.345e+23,"radius":2575,"discovered":"1600s"},"clues":{"facts":["It is the only moon with a thick atmosphere.","It has lakes and seas of liquid methane and ethane.","It is Saturn's largest moon; the Huygens probe landed there in 2005."]},"image":"assets/objects/titan.jpg","imageCredit":"NASA/JPL-Caltech/SSI/Kevin M. Gill, CC BY 2.0 (Wikimedia Commons)"},{"id":"enceladus","name":"Enceladus","attributes":{"type":"Moon","location":"Solar System","distance":0.0001512,"mass":108000000000000000000,"radius":252.1,"discovered":"1700s"},"clues":{"facts":["It reflects almost all of the sunlight that hits it.","Geysers of water shoot from cracks near its south pole.","This small icy moon of Saturn feeds the planet's E ring."]},"image":"assets/objects/enceladus.jpg","imageCredit":"National Aeronautics and Space Administration (NASA) / Jet Propulsion Laboratory (JPL), Public domain (Wikimedia Commons)"},{"id":"mimas","name":"Mimas","attributes":{"type":"Moon","location":"Solar System","distance":0.0001512,"mass":37500000000000000000,"radius":198.2,"discovered":"1700s"},"clues":{"facts":["It is one of the smallest moons that is round because of its own gravity.","A giant crater named Herschel spans about a third of its width.","This Saturn moon looks a lot like the Death Star from Star Wars."]},"image":"assets/objects/mimas.jpg","imageCredit":"NASA / JPL / Space Science Institute, Public domain (Wikimedia Commons)"},{"id":"iapetus","name":"Iapetus","attributes":{"type":"Moon","location":"Solar System","distance":0.0001512,"mass":1.806e+21,"radius":734.4,"discovered":"1600s"},"clues":{"facts":["One side is as dark as coal, the other as bright as snow.","A strange ridge runs along its equator, making it look like a walnut.","It is Saturn's third-largest moon, discovered by Cassini in 1671."]},"image":"assets/objects/iapetus.jpg","imageCredit":"NASA / JPL / Space Science Institute, Public domain (Wikimedia Commons)"},{"id":"rhea","name":"Rhea","attributes":{"type":"Moon","location":"Solar System","distance":0.0001512,"mass":2.307e+21,"radius":763.8,"discovered":"1600s"},"clues":{"facts":["It is a cold world made mostly of water ice.","It is the second-largest moon of its planet.","Cassini discovered it in 1672; it orbits Saturn."]},"image":"assets/objects/rhea.jpg","imageCredit":"NASA/JPL/Space Science Institute, Public domain (Wikimedia Commons)"},{"id":"dione","name":"Dione","attributes":{"type":"Moon","location":"Solar System","distance":0.0001512,"mass":1.095e+21,"radius":561.4,"discovered":"1600s"},"clues":{"facts":["Bright ice cliffs streak across one of its sides.","It shares its orbit with two tiny moons, Helene and Polydeuces.","This Saturn moon was discovered by Giovanni Cassini in 1684."]},"image":"assets/objects/dione.jpg","imageCredit":"NASA, Public domain (Wikimedia Commons)"},{"id":"tethys","name":"Tethys","attributes":{"type":"Moon","location":"Solar System","distance":0.0001512,"mass":617500000000000000000,"radius":531.1,"discovered":"1600s"},"clues":{"facts":["It is made almost entirely of water ice.","A huge canyon, Ithaca Chasma, runs about three-quarters of the way around it.","This Saturn moon has a giant crater named Odysseus."]},"image":"assets/objects/tethys.jpg","imageCredit":"NASA / JPL-Caltech / SSI / Gordan Ugarkovic, Public domain (Wikimedia Commons)"},{"id":"hyperion","name":"Hyperion","attributes":{"type":"Moon","location":"Solar System","distance":0.0001512,"mass":5620000000000000000,"radius":135,"discovered":"1800s"},"clues":{"facts":["It tumbles chaotically instead of spinning steadily.","Its spongy-looking surface is full of deep, sharp-edged craters.","It is one of the largest non-round moons, orbiting Saturn."]},"image":"assets/objects/hyperion.jpg","imageCredit":"NASA / JPL / SSI / Gordan Ugarkovic, Public domain (Wikimedia Commons)"},{"id":"miranda","name":"Miranda","attributes":{"type":"Moon","location":"Solar System","distance":0.0003036,"mass":64000000000000000000,"radius":235.8,"discovered":"1900–1949"},"clues":{"facts":["Its surface looks like a patchwork of very different terrains.","Its cliff Verona Rupes may be the tallest in the Solar System, about 20 km.","It is the smallest of the five main moons of Uranus."]},"image":"assets/objects/miranda.jpg","imageCredit":"zelario12, CC BY-SA 2.0 (Wikimedia Commons)"},{"id":"ariel","name":"Ariel","attributes":{"type":"Moon","location":"Solar System","distance":0.0003036,"mass":1.25e+21,"radius":578.9,"discovered":"1800s"},"clues":{"facts":["It has the brightest and possibly youngest surface of its planet's moons.","It is named after a spirit in Shakespeare's The Tempest and Pope's The Rape of the Lock.","It is the fourth-largest moon of Uranus."]},"image":"assets/objects/ariel.jpg","imageCredit":"Kevin M. Gill, CC BY 2.0 (Wikimedia Commons)"},{"id":"titania","name":"Titania","attributes":{"type":"Moon","location":"Solar System","distance":0.0003036,"mass":3.4e+21,"radius":788.4,"discovered":"1700s"},"clues":{"facts":["It was discovered by William Herschel in 1787.","It is named after the queen of the fairies in A Midsummer Night's Dream.","It is the largest moon of Uranus."]},"image":"assets/objects/titania.jpg","imageCredit":"zelario12, CC BY-SA 2.0 (Wikimedia Commons)"},{"id":"oberon","name":"Oberon","attributes":{"type":"Moon","location":"Solar System","distance":0.0003036,"mass":3.08e+21,"radius":761.4,"discovered":"1700s"},"clues":{"facts":["It was discovered on the same night as its slightly larger sibling in 1787.","It is named after the king of the fairies in A Midsummer Night's Dream.","It is the outermost of the major moons of Uranus."]},"image":"assets/objects/oberon.jpg","imageCredit":"Kevin M. Gill, CC BY 2.0 (Wikimedia Commons)"},{"id":"triton","name":"Triton","attributes":{"type":"Moon","location":"Solar System","distance":0.0004756,"mass":2.139e+22,"radius":1353,"discovered":"1800s"},"clues":{"facts":["It orbits its planet backwards, against the planet's spin.","Voyager 2 saw nitrogen geysers erupting from its surface in 1989.","It is Neptune's largest moon and probably a captured Kuiper Belt object."]},"image":"assets/objects/triton.jpg","imageCredit":"Michael T. Bland, U.S. Geological Survey (USGS), CC BY 4.0 (Wikimedia Commons)"},{"id":"charon","name":"Charon","attributes":{"type":"Moon","location":"Solar System","distance":0.0006244,"mass":1.586e+21,"radius":606,"discovered":"1950–1999"},"clues":{"facts":["It is about half the width of the world it orbits.","It and its partner always show each other the same face.","It is the largest moon of Pluto, discovered in 1978."]},"image":"assets/objects/charon.jpg","imageCredit":"NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute/Alex Parker, Public domain (Wikimedia Commons)"},{"id":"vesta","name":"Vesta","aliases":["4 Vesta"],"attributes":{"type":"Asteroid","location":"Solar System","distance":0.00003904,"mass":259000000000000000000,"radius":262.7,"discovered":"1800s"},"clues":{"facts":["It is the brightest asteroid seen from Earth, sometimes visible to the naked eye.","Its giant impact basin, Rheasilvia, has a central peak about 20 km high.","NASA's Dawn spacecraft orbited it in 2011–2012 before moving on to Ceres."]},"image":"assets/objects/vesta.jpg","imageCredit":"NASA / JPL / MPS / DLR / IDA / Björn Jónsson, Public domain (Wikimedia Commons)"},{"id":"pallas","name":"Pallas","aliases":["2 Pallas"],"attributes":{"type":"Asteroid","location":"Solar System","distance":0.00004529,"mass":204000000000000000000,"radius":256,"discovered":"1800s"},"clues":{"facts":["It was the second asteroid ever discovered, in 1802.","Its orbit is steeply tilted, about 35° to the plane of the planets.","It shares its name with an epithet of the goddess Athena."]},"image":"assets/objects/pallas.jpg","imageCredit":"ESO/Vernazza et al., CC BY 4.0 (Wikimedia Commons)"},{"id":"juno","name":"Juno","aliases":["3 Juno"],"attributes":{"type":"Asteroid","location":"Solar System","distance":0.0000437,"mass":26700000000000000000,"radius":127,"discovered":"1800s"},"clues":{"facts":["It was the third asteroid ever discovered, in 1804.","It is one of the largest stony (S-type) asteroids.","It is named after the queen of the Roman gods."]},"image":"assets/objects/juno.jpg","imageCredit":"VSO Very Large Telescope SPHERE/ZIMPOL team, CC BY-SA 4.0 (Wikimedia Commons)"},{"id":"eros","name":"Eros","aliases":["433 Eros"],"attributes":{"type":"Asteroid","location":"Solar System","distance":0.00002586,"mass":6687000000000000,"radius":8.42,"discovered":"1800s"},"clues":{"facts":["It was the first near-Earth asteroid ever discovered, in 1898.","It is shaped like a peanut about 34 km long.","In 2001 NEAR Shoemaker landed on it, the first landing on an asteroid."]},"image":"assets/objects/eros.jpg","imageCredit":"NASA/JPL/JHUAPL (color version published at Planetary Society), Public domain (Wikimedia Commons)"},{"id":"psyche","name":"Psyche","aliases":["16 Psyche"],"attributes":{"type":"Asteroid","location":"Solar System","distance":0.00004754,"mass":22900000000000000000,"radius":113,"discovered":"1800s"},"clues":{"facts":["It may be the exposed metal core of a shattered baby planet.","A NASA spacecraft named after it launched in 2023 and should arrive in 2029.","It is named after the Greek goddess of the soul."]},"image":"assets/objects/psyche.jpg","imageCredit":"ESO/Vernazza et al./MISTRAL algorithm (ONERA/CNRS), CC BY 4.0 (Wikimedia Commons)"},{"id":"bennu","name":"Bennu","aliases":["101955 Bennu"],"attributes":{"type":"Asteroid","location":"Solar System","distance":0.00002154,"mass":73290000000,"radius":0.245,"discovered":"1950–1999"},"clues":{"facts":["It is a small 'rubble pile' asteroid that passes near Earth.","It has one of the highest known chances of hitting Earth, in the late 2100s.","NASA's OSIRIS-REx brought samples of it back to Earth in 2023."]},"image":"assets/objects/bennu.jpg","imageCredit":"NASA/Goddard/University of Arizona, Public domain (Wikimedia Commons)"},{"id":"ryugu","name":"Ryugu","aliases":["162173 Ryugu"],"attributes":{"type":"Asteroid","location":"Solar System","distance":0.00002232,"mass":450000000000,"radius":0.448,"discovered":"1950–1999"},"clues":{"facts":["It is a dark, carbon-rich asteroid shaped like a spinning top.","Its name comes from a Japanese folk tale about a dragon's palace under the sea.","Japan's Hayabusa2 brought samples of it back to Earth in 2020."]},"image":"assets/objects/ryugu.jpg","imageCredit":"Original image taken by JAXA/ISAS, processed by User:Anonymsiy, image adjusted by User:Nrco0e, CC BY 4.0 (Wikimedia Commons)"},{"id":"apophis","name":"Apophis","aliases":["99942 Apophis"],"attributes":{"type":"Asteroid","location":"Solar System","distance":0.00001941,"mass":61000000000,"radius":0.17,"discovered":"2000s"},"clues":{"facts":["In 2004 it briefly had the highest impact-risk rating ever given.","On 13 April 2029 it will pass closer to Earth than many satellites.","It is named after the Egyptian serpent god of chaos."]},"image":"assets/objects/apophis.jpg","imageCredit":"Astronomical Institute of the Charles University: Josef Ďurech, Vojtěch Sidorin, CC BY 4.0 (Wikimedia Commons)"},{"id":"oumuamua","name":"'Oumuamua","aliases":["Oumuamua","1I/2017 U1","1I/ʻOumuamua"],"attributes":{"type":"Asteroid","location":"Solar System","distance":0.0007906,"mass":null,"radius":null,"discovered":"2010s"},"clues":{"facts":["It was moving too fast to be held by the Sun's gravity.","It seemed strongly elongated or flattened, unlike any asteroid seen before.","It was the first known interstellar object, spotted from Hawaii in 2017."]},"image":"assets/objects/oumuamua.jpg","imageCredit":"Alan Fitzsimmons (QUB), Isaac Newton Group; derivative: nagualdesign, Public domain (Wikimedia Commons)"},{"id":"halleys-comet","name":"Halley's Comet","aliases":["Halley","1P/Halley","Comet Halley"],"attributes":{"type":"Comet","location":"Solar System","distance":0.0002822,"mass":220000000000000,"radius":5.5,"discovered":"Before 1600"},"clues":{"facts":["It returns to the inner Solar System roughly every 76 years.","It appears in the Bayeux Tapestry, which records its visit in 1066.","Its next return is expected in 2061."]},"image":"assets/objects/halleys-comet.jpg","imageCredit":"NASA/W. Liller, Public domain (Wikimedia Commons)"},{"id":"hale-bopp","name":"Hale-Bopp","aliases":["Comet Hale-Bopp","C/1995 O1"],"attributes":{"type":"Comet","location":"Solar System","distance":0.002941,"mass":13000000000000000,"radius":30,"discovered":"1950–1999"},"clues":{"facts":["It stayed visible to the naked eye for a record 18 months.","Its nucleus is unusually large, around 60 km across.","This great comet of 1997 was found independently by two American observers."]},"image":"assets/objects/hale-bopp.jpg","imageCredit":"E. Kolmhofer, H. Raab; Johannes-Kepler-Observatory, Linz, CC BY-SA 3.0 (Wikimedia Commons)"},{"id":"67p","name":"67P/Churyumov–Gerasimenko","aliases":["67P","Churyumov-Gerasimenko","Comet 67P"],"attributes":{"type":"Comet","location":"Solar System","distance":0.00005586,"mass":9982000000000,"radius":1.65,"discovered":"1950–1999"},"clues":{"facts":["Its two-lobed shape is often compared to a rubber duck.","The Philae lander touched down on it in 2014, the first landing on a comet.","ESA's Rosetta spacecraft orbited it for two years."]},"image":"assets/objects/67p.jpg","imageCredit":"ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA, CC BY-SA 4.0 (Wikimedia Commons)"},{"id":"neowise","name":"Comet NEOWISE","aliases":["NEOWISE","C/2020 F3"],"attributes":{"type":"Comet","location":"Solar System","distance":0.005629,"mass":null,"radius":2.5,"discovered":"2020s"},"clues":{"facts":["It was the brightest comet seen from the Northern Hemisphere in over 20 years.","A space telescope discovered it in March 2020.","It lit up summer evening skies in July 2020, during the pandemic."]},"image":"assets/objects/neowise.jpg","imageCredit":"SimgDe, CC BY-SA 4.0 (Wikimedia Commons)"},{"id":"encke","name":"Comet Encke","aliases":["Encke","2P/Encke","Encke's Comet"],"attributes":{"type":"Comet","location":"Solar System","distance":0.00003691,"mass":null,"radius":2.4,"discovered":"1700s"},"clues":{"facts":["It has the shortest orbital period of any well-known comet, about 3.3 years.","Its dust trail is the source of the Taurid meteor showers.","It is named after the German astronomer who worked out its orbit in 1819."]},"image":"assets/objects/encke.jpg","imageCredit":"Jim Scotti, Public domain (Wikimedia Commons)"},{"id":"borisov","name":"2I/Borisov","aliases":["Borisov","Comet Borisov","C/2019 Q4"],"attributes":{"type":"Comet","location":"Solar System","distance":0.0007116,"mass":null,"radius":0.4,"discovered":"2010s"},"clues":{"facts":["It came from outside the Solar System.","It was the first interstellar visitor that clearly behaved like a comet.","An amateur astronomer in Crimea found it with a homemade telescope in 2019."]},"image":"assets/objects/borisov.jpg","imageCredit":"NASA, ESA, and D. Jewitt (UCLA), Public domain (Wikimedia Commons)"},{"id":"3i-atlas","name":"3I/ATLAS","aliases":["C/2025 N1","ATLAS"],"attributes":{"type":"Comet","location":"Solar System","distance":0.0001898,"mass":null,"radius":null,"discovered":"2020s"},"clues":{"facts":["It is only the third object known to come from another star system.","It was discovered in July 2025 by a survey telescope in Chile.","Some estimates suggest it could be older than the Solar System."]},"image":"assets/objects/3i-atlas.jpg","imageCredit":"International Gemini Observatory/NOIRLab/NSF/AURA/B. Bolin, CC BY 4.0 (Wikimedia Commons)"},{"id":"sirius","name":"Sirius","aliases":["Dog Star","Alpha Canis Majoris"],"attributes":{"type":"Star","location":"Milky Way","distance":8.6,"mass":4.102e+30,"radius":1190000,"discovered":"Always visible"},"clues":{"facts":["It is a binary: its faint companion is a white dwarf.","Ancient Egyptians linked its yearly rising to the Nile flood.","It is the brightest star in the night sky."]},"image":"assets/objects/sirius.jpg","imageCredit":"NASA, ESA, H. Bond (STScI), and M. Barstow (University of Leicester), Public domain (Wikimedia Commons)"},{"id":"canopus","name":"Canopus","aliases":["Alpha Carinae"],"attributes":{"type":"Star","location":"Milky Way","distance":310,"mass":1.591e+31,"radius":49390000,"discovered":"Always visible"},"clues":{"facts":["Spacecraft have used it as a reference star for navigation.","It is a bright white giant in the southern sky.","It is the second-brightest star in the night sky."]},"image":"assets/objects/canopus.jpg","imageCredit":"NASA, Public domain (Wikimedia Commons)"},{"id":"arcturus","name":"Arcturus","aliases":["Alpha Boötis"],"attributes":{"type":"Star","location":"Milky Way","distance":36.7,"mass":2.148e+30,"radius":17670000,"discovered":"Always visible"},"clues":{"facts":["It is an orange giant moving unusually fast relative to the Sun.","Its light was used to switch on the 1933 Chicago World's Fair.","It is the brightest star in the northern half of the sky, in Boötes."]},"image":"assets/objects/arcturus.jpg","imageCredit":"Roberto Mura, CC BY-SA 4.0 (Wikimedia Commons)"},{"id":"alpha-centauri-a","name":"Alpha Centauri A","aliases":["Rigil Kentaurus","Rigil Kent","Alpha Centauri"],"attributes":{"type":"Star","location":"Milky Way","distance":4.37,"mass":2.145e+30,"radius":847000,"discovered":"Always visible"},"clues":{"facts":["It is very similar to the Sun, only slightly bigger.","It is the main member of a triple star system.","It belongs to the closest star system to the Sun."]},"image":"assets/objects/alpha-centauri-a.jpg","imageCredit":"Digitized Sky Survey 2. Acknowledgement: Davide De Martin/Mahdi Zamani, CC BY 4.0 (Wikimedia Commons)"},{"id":"proxima-centauri","name":"Proxima Centauri","aliases":["Proxima","Alpha Centauri C"],"attributes":{"type":"Star","location":"Milky Way","distance":4.247,"mass":2.428e+29,"radius":107300,"discovered":"1900–1949"},"clues":{"facts":["It is a small, dim red dwarf that you cannot see with the naked eye.","It hosts at least one Earth-mass planet in its habitable zone.","It is the closest known star to the Sun."]},"image":"assets/objects/proxima-centauri.jpg","imageCredit":"ESA/Hubble & NASA, CC BY 4.0 (Wikimedia Commons)"},{"id":"vega","name":"Vega","aliases":["Alpha Lyrae"],"attributes":{"type":"Star","location":"Milky Way","distance":25.04,"mass":4.245e+30,"radius":1739000,"discovered":"Always visible"},"clues":{"facts":["In 1850 it became the first star other than the Sun to be photographed.","About 12,000 years ago it was the North Star, and it will be again.","It is the brightest star in Lyra and part of the Summer Triangle."]},"image":"assets/objects/vega.jpg","imageCredit":"Courtesy NASA/JPL-Caltech/University of Arizona, Public domain (Wikimedia Commons)"},{"id":"capella","name":"Capella","aliases":["Alpha Aurigae"],"attributes":{"type":"Star","location":"Milky Way","distance":42.9,"mass":5.11e+30,"radius":8334000,"discovered":"Always visible"},"clues":{"facts":["It is really two pairs of stars, including two yellow giants.","It is the brightest star in the constellation Auriga.","It is the sixth-brightest star in the sky; its name means 'little she-goat'."]},"image":"assets/objects/capella.jpg","imageCredit":"Roberto Mura, CC BY-SA 4.0 (Wikimedia Commons)"},{"id":"rigel","name":"Rigel","aliases":["Beta Orionis"],"attributes":{"type":"Star","location":"Milky Way","distance":860,"mass":4.176e+31,"radius":51480000,"discovered":"Always visible"},"clues":{"facts":["It is a blue supergiant over 100,000 times more luminous than the Sun.","Despite its 'Beta' label it is usually the brightest star in its constellation.","It marks the left foot of the hunter Orion."]},"image":"assets/objects/rigel.jpg","imageCredit":"Haktarfone, CC BY-SA 3.0 (Wikimedia Commons)"},{"id":"procyon","name":"Procyon","aliases":["Alpha Canis Minoris"],"attributes":{"type":"Star","location":"Milky Way","distance":11.46,"mass":2.981e+30,"radius":1425000,"discovered":"Always visible"},"clues":{"facts":["Like the brightest star in the sky, it has a white-dwarf companion.","Its name means 'before the dog', because it rises just before the Dog Star.","It is the brightest star of the Little Dog constellation."]},"image":"assets/objects/procyon.jpg","imageCredit":"Zwergelstern (Wikimedia Commons user), Public domain (Wikimedia Commons)"},{"id":"betelgeuse","name":"Betelgeuse","aliases":["Alpha Orionis"],"attributes":{"type":"Star","location":"Milky Way","distance":548,"mass":3.579e+31,"radius":531500000,"discovered":"Always visible"},"clues":{"facts":["It is a red supergiant expected to explode as a supernova within about 100,000 years.","It faded dramatically in 2019–2020 in an event called the Great Dimming.","It marks a shoulder of the hunter Orion."]},"image":"assets/objects/betelgeuse.jpg","imageCredit":"ALMA (ESO/NAOJ/NRAO)/E. O’Gorman/P. Kervella, CC BY 4.0 (Wikimedia Commons)"},{"id":"achernar","name":"Achernar","aliases":["Alpha Eridani"],"attributes":{"type":"Star","location":"Milky Way","distance":139,"mass":1.193e+31,"radius":5566000,"discovered":"Always visible"},"clues":{"facts":["It spins so fast that it is one of the least round stars known.","Its name comes from Arabic for 'end of the river'.","It is the brightest star in the river constellation Eridanus."]},"image":"assets/objects/achernar.jpg","imageCredit":"Roberto Mura, CC BY-SA 4.0 (Wikimedia Commons)"},{"id":"altair","name":"Altair","aliases":["Alpha Aquilae"],"attributes":{"type":"Star","location":"Milky Way","distance":16.73,"mass":3.699e+30,"radius":1252000,"discovered":"Always visible"},"clues":{"facts":["It spins once every 9 hours, which flattens it noticeably.","It was one of the first ordinary stars to have its surface imaged.","It is the brightest star in Aquila and part of the Summer Triangle."]},"image":"assets/objects/altair.jpg","imageCredit":"Ming Zhao, John Monnier; derivative work: Omnidom 999, Public domain (Wikimedia Commons)"},{"id":"aldebaran","name":"Aldebaran","aliases":["Alpha Tauri"],"attributes":{"type":"Star","location":"Milky Way","distance":65.3,"mass":2.307e+30,"radius":30610000,"discovered":"Always visible"},"clues":{"facts":["It is an orange giant about 44 times wider than the Sun.","The Pioneer 10 probe is heading roughly in its direction.","It is the red 'eye' of the bull in Taurus."]},"image":"assets/objects/aldebaran.jpg","imageCredit":"NASA, ESA, and STScI, CC BY-SA 4.0 (Wikimedia Commons)"},{"id":"antares","name":"Antares","aliases":["Alpha Scorpii"],"attributes":{"type":"Star","location":"Milky Way","distance":554,"mass":2.386e+31,"radius":473100000,"discovered":"Always visible"},"clues":{"facts":["Placed where the Sun is, this red supergiant would reach past the orbit of Mars.","Its name means 'rival of Ares' because of its red colour.","It is the heart of the scorpion in Scorpius."]},"image":"assets/objects/antares.jpg","imageCredit":"Dylan O'Donnell (deography.com), CC0 (Wikimedia Commons)"},{"id":"spica","name":"Spica","aliases":["Alpha Virginis"],"attributes":{"type":"Star","location":"Milky Way","distance":250,"mass":2.273e+31,"radius":5197000,"discovered":"Always visible"},"clues":{"facts":["It is a close pair of hot blue stars that pull each other into egg shapes.","Hipparchus used it to discover the precession of the equinoxes.","It is the brightest star in Virgo."]},"image":"assets/objects/spica.jpg","imageCredit":"Roberto Mura, CC BY-SA 4.0 (Wikimedia Commons)"},{"id":"pollux","name":"Pollux","aliases":["Beta Geminorum"],"attributes":{"type":"Star","location":"Milky Way","distance":33.8,"mass":3.798e+30,"radius":6303000,"discovered":"Always visible"},"clues":{"facts":["It is an orange giant with a known planet.","It is the closest giant star to the Sun.","It is the brightest star in Gemini, named after one of the twins."]},"image":"assets/objects/pollux.jpg","imageCredit":"Murgor Multoface, CC0 (Wikimedia Commons)"},{"id":"fomalhaut","name":"Fomalhaut","aliases":["Alpha Piscis Austrini"],"attributes":{"type":"Star","location":"Milky Way","distance":25.13,"mass":3.818e+30,"radius":1280000,"discovered":"Always visible"},"clues":{"facts":["It is surrounded by a wide, sharp-edged ring of dust.","Its name means 'mouth of the fish' in Arabic.","It is the brightest star of the Southern Fish constellation."]},"image":"assets/objects/fomalhaut.jpg","imageCredit":"ESA, NASA, and L. Calcada (ESO for STScI), Public domain (Wikimedia Commons)"},{"id":"deneb","name":"Deneb","aliases":["Alpha Cygni"],"attributes":{"type":"Star","location":"Milky Way","distance":2600,"mass":3.778e+31,"radius":141200000,"discovered":"Always visible"},"clues":{"facts":["It is one of the most luminous stars visible to the naked eye.","It is part of the Summer Triangle, along with two closer stars.","It marks the tail of the swan in Cygnus."]},"image":"assets/objects/deneb.jpg","imageCredit":"Roberto Mura, CC BY-SA 4.0 (Wikimedia Commons)"},{"id":"regulus","name":"Regulus","aliases":["Alpha Leonis"],"attributes":{"type":"Star","location":"Milky Way","distance":79.3,"mass":7.556e+30,"radius":2435000,"discovered":"Always visible"},"clues":{"facts":["It spins so fast that it is close to flying apart.","It sits almost on the ecliptic, so the Moon and planets often pass in front of it.","It is the brightest star in Leo, the 'heart of the lion'."]},"image":"assets/objects/regulus.jpg","imageCredit":"Roberto Mura, CC BY-SA 4.0 (Wikimedia Commons)"},{"id":"castor","name":"Castor","aliases":["Alpha Geminorum"],"attributes":{"type":"Star","location":"Milky Way","distance":51,"mass":4.713e+30,"radius":1670000,"discovered":"Always visible"},"clues":{"facts":["It looks like one star but is a system of six stars.","It is named after one of the twin brothers of Greek myth.","It is the second-brightest star in Gemini."]},"image":"assets/objects/castor.jpg","imageCredit":"Roberto Mura, CC BY-SA 4.0 (Wikimedia Commons)"},{"id":"polaris","name":"Polaris","aliases":["North Star","Pole Star","Alpha Ursae Minoris"],"attributes":{"type":"Star","location":"Milky Way","distance":433,"mass":1.02e+31,"radius":32000000,"discovered":"Always visible"},"clues":{"facts":["It is a pulsating yellow supergiant, a Cepheid variable.","It barely moves in the sky while all the other stars circle around it.","It sits at the end of the Little Dipper's handle and points the way north."]},"image":"assets/objects/polaris.jpg","imageCredit":"NASA, ESA, N. Evans (Harvard-Smithsonian CfA), and H. Bond (STScI), Public domain (Wikimedia Commons)"},{"id":"mira","name":"Mira","aliases":["Omicron Ceti"],"attributes":{"type":"Star","location":"Milky Way","distance":300,"mass":2.386e+30,"radius":243500000,"discovered":"Before 1600"},"clues":{"facts":["This red giant brightens and fades over a cycle of about 11 months.","It trails a 13-light-year-long tail of material behind it.","Its name means 'wonderful'; it lies in Cetus, the whale."]},"image":"assets/objects/mira.jpg","imageCredit":"Margarita Karovska (Harvard-Smithsonian Center for Astrophysics) and NASA, Public domain (Wikimedia Commons)"},{"id":"algol","name":"Algol","aliases":["Demon Star","Beta Persei"],"attributes":{"type":"Star","location":"Milky Way","distance":90,"mass":6.303e+30,"radius":1899000,"discovered":"Always visible"},"clues":{"facts":["Its brightness drops every 2.87 days when one star blocks another.","Its name comes from Arabic for 'the head of the ghoul'.","It marks the head of Medusa held by Perseus."]},"image":"assets/objects/algol.jpg","imageCredit":"Dr Fabien Baron, University of Michigan, CC BY-SA 3.0 (Wikimedia Commons)"},{"id":"barnards-star","name":"Barnard's Star","aliases":["Barnard"],"attributes":{"type":"Star","location":"Milky Way","distance":5.96,"mass":3.221e+29,"radius":130100,"discovered":"1900–1949"},"clues":{"facts":["It is a dim red dwarf, one of the oldest stars near the Sun.","It moves across our sky faster than any other star.","It is the closest single star to the Sun."]},"image":"assets/objects/barnards-star.jpg","imageCredit":"Steve Quirk, Public domain (Wikimedia Commons)"},{"id":"tau-ceti","name":"Tau Ceti","attributes":{"type":"Star","location":"Milky Way","distance":11.9,"mass":1.557e+30,"radius":551700,"discovered":"Always visible"},"clues":{"facts":["It is a Sun-like star close enough to see with the naked eye.","It was a target of the first modern radio search for aliens, Project Ozma, in 1960.","It is a favourite setting for science-fiction stories about nearby worlds."]},"image":"assets/objects/tau-ceti.jpg","imageCredit":"Pablo Carlos Budassi based on a work by NASA/Tim Pyle, Public domain (Wikimedia Commons)"},{"id":"epsilon-eridani","name":"Epsilon Eridani","aliases":["Ran"],"attributes":{"type":"Star","location":"Milky Way","distance":10.5,"mass":1.631e+30,"radius":511300,"discovered":"Always visible"},"clues":{"facts":["It is a young, active orange dwarf with a disc of dust.","It was also a target of Project Ozma, the 1960 radio search for aliens.","It is one of the nearest stars visible to the naked eye, in the river constellation."]},"image":"assets/objects/epsilon-eridani.jpg","imageCredit":"NASA, ESA, G. Bacon, Public domain (Wikimedia Commons)"},{"id":"wolf-359","name":"Wolf 359","attributes":{"type":"Star","location":"Milky Way","distance":7.86,"mass":2.187e+29,"radius":104400,"discovered":"1900–1949"},"clues":{"facts":["It is one of the faintest and smallest stars near the Sun.","A German astronomer found it on photographic plates in 1918.","In Star Trek it is the site of a great battle against the Borg."]},"image":"assets/objects/wolf-359.jpg","imageCredit":"Klaus Hohmann, http://astrofotografie.hohmann-edv.de/, Public domain (Wikimedia Commons)"},{"id":"trappist-1","name":"TRAPPIST-1","aliases":["2MASS J23062928-0502285"],"attributes":{"type":"Star","location":"Milky Way","distance":40.66,"mass":1.786e+29,"radius":82930,"discovered":"2000s"},"clues":{"facts":["It is an ultra-cool red dwarf only slightly larger than Jupiter.","It has seven known Earth-sized planets.","It is named after a small Belgian robotic telescope."]},"image":"assets/objects/trappist-1.jpg","imageCredit":"Processing and color compositing by Nrco0e; original images by Sloan Digital Sky Survey, CC BY 4.0 (Wikimedia Commons)"},{"id":"vy-canis-majoris","name":"VY Canis Majoris","aliases":["VY CMa"],"attributes":{"type":"Star","location":"Milky Way","distance":3820,"mass":3.38e+31,"radius":987900000,"discovered":"1800s"},"clues":{"facts":["It is a red hypergiant throwing off huge amounts of material.","It is one of the largest known stars, over 1,400 times the Sun's radius.","Telescopes see it wrapped in a huge, lumpy cloud of dust."]},"image":"assets/objects/vy-canis-majoris.jpg","imageCredit":"Haktarfone, CC BY-SA 3.0 (Wikimedia Commons)"},{"id":"uy-scuti","name":"UY Scuti","attributes":{"type":"Star","location":"Milky Way","distance":5900,"mass":1.988e+31,"radius":632400000,"discovered":"1800s"},"clues":{"facts":["It is a red supergiant in a small southern constellation.","It was once listed as the largest known star, before its distance was revised.","It was first catalogued in 1860 at the Bonn Observatory."]},"image":"assets/objects/uy-scuti.jpg","imageCredit":"ESO/Digitized Sky Survey 2, CC BY-SA 3.0 (Wikimedia Commons)"},{"id":"eta-carinae","name":"Eta Carinae","attributes":{"type":"Star","location":"Milky Way","distance":7500,"mass":1.988e+32,"radius":167000000,"discovered":"1600s"},"clues":{"facts":["It is a pair of very massive stars, the larger around 100 times the Sun's mass.","In the 1840s it briefly became the second-brightest star in the sky.","It is wrapped in an hourglass-shaped cloud called the Homunculus Nebula."]},"image":"assets/objects/eta-carinae.jpg","imageCredit":"Jon Morse (University of Colorado) & NASA Hubble Space Telescope, Public domain (Wikimedia Commons)"},{"id":"r136a1","name":"R136a1","attributes":{"type":"Star","location":"Local Group","distance":163000,"mass":3.897e+32,"radius":29710000,"discovered":"1950–1999"},"clues":{"facts":["It is the most massive star known, around 200 times the Sun's mass.","It shines millions of times brighter than the Sun.","It sits in a young cluster inside the Tarantula Nebula in the Large Magellanic Cloud."]},"image":"assets/objects/r136a1.jpg","imageCredit":"ESO/P. Crowther/C.J. Evans, CC BY 4.0 (Wikimedia Commons)"},{"id":"51-pegasi-b","name":"51 Pegasi b","aliases":["Dimidium","51 Peg b"],"attributes":{"type":"Exoplanet","location":"Milky Way","distance":50.6,"mass":8.731e+26,"radius":null,"discovered":"1950–1999"},"clues":{"facts":["It was the first exoplanet found orbiting a Sun-like star.","Its discovery earned a share of the 2019 Nobel Prize in Physics.","It is the original 'hot Jupiter', circling its star every 4.2 days."]},"image":"assets/objects/51-pegasi-b.jpg","imageCredit":"ESO/M. Kornmesser/Nick Risinger (skysurvey.org), CC BY 4.0 (Wikimedia Commons)"},{"id":"proxima-centauri-b","name":"Proxima Centauri b","aliases":["Proxima b"],"attributes":{"type":"Exoplanet","location":"Milky Way","distance":4.247,"mass":6.39e+24,"radius":null,"discovered":"2010s"},"clues":{"facts":["It orbits in the habitable zone of a red dwarf.","A year there lasts only about 11 days.","It is the closest known exoplanet to Earth."]},"image":"assets/objects/proxima-centauri-b.jpg","imageCredit":"ESO/M. Kornmesser, CC BY 4.0 (Wikimedia Commons)"},{"id":"trappist-1e","name":"TRAPPIST-1e","attributes":{"type":"Exoplanet","location":"Milky Way","distance":40.66,"mass":4.133e+24,"radius":5861,"discovered":"2010s"},"clues":{"facts":["It is a rocky planet about the size of Earth.","It is one of seven planets around the same tiny red dwarf.","It is often seen as the most promising possibly habitable planet of its system."]},"image":"assets/objects/trappist-1e.jpg","imageCredit":"NASA/JPL-Caltech, Public domain (Wikimedia Commons)"},{"id":"kepler-22b","name":"Kepler-22b","attributes":{"type":"Exoplanet","location":"Milky Way","distance":640,"mass":null,"radius":13380,"discovered":"2010s"},"clues":{"facts":["In 2011 it became the first planet a space telescope found in its star's habitable zone.","It is about twice as wide as Earth and might be an ocean world.","It orbits a Sun-like star about 640 light-years away in Cygnus."]},"image":"assets/objects/kepler-22b.jpg","imageCredit":"NASA/Ames/JPL-Caltech, Public domain (Wikimedia Commons)"},{"id":"kepler-452b","name":"Kepler-452b","attributes":{"type":"Exoplanet","location":"Milky Way","distance":1800,"mass":null,"radius":10380,"discovered":"2010s"},"clues":{"facts":["It was nicknamed 'Earth's older cousin' and 'Earth 2.0'.","A year there lasts 385 days.","It orbits a Sun-like star about 1,800 light-years away."]},"image":"assets/objects/kepler-452b.jpg","imageCredit":"NASA Ames/JPL-Caltech/T. Pyle, Public domain (Wikimedia Commons)"},{"id":"kepler-186f","name":"Kepler-186f","attributes":{"type":"Exoplanet","location":"Milky Way","distance":580,"mass":null,"radius":7454,"discovered":"2010s"},"clues":{"facts":["In 2014 it was the first Earth-sized planet found in a habitable zone.","It orbits a red dwarf in Cygnus.","It is the outermost of five known planets in its system."]},"image":"assets/objects/kepler-186f.jpg","imageCredit":"NASA Ames/SETI Institute/JPL-Caltech, Public domain (Wikimedia Commons)"},{"id":"hd-209458-b","name":"HD 209458 b","aliases":["Osiris"],"attributes":{"type":"Exoplanet","location":"Milky Way","distance":157,"mass":1.31e+27,"radius":98660,"discovered":"1950–1999"},"clues":{"facts":["It was the first exoplanet seen passing in front of its star.","It was the first exoplanet found to have an atmosphere.","It trails a comet-like tail of escaping hydrogen."]},"image":"assets/objects/hd-209458-b.jpg","imageCredit":"Aldaron, a.k.a. Aldaron, CC BY-SA 3.0 (Wikimedia Commons)"},{"id":"hd-189733-b","name":"HD 189733 b","attributes":{"type":"Exoplanet","location":"Milky Way","distance":64.5,"mass":2.145e+27,"radius":81360,"discovered":"2000s"},"clues":{"facts":["It is a hot Jupiter that looks deep blue.","It may rain glass sideways in winds of thousands of km/h.","Its star appears near the Dumbbell Nebula in the sky, 64 light-years away."]},"image":"assets/objects/hd-189733-b.jpg","imageCredit":"SevenSpheres, CC BY 4.0 (Wikimedia Commons)"},{"id":"55-cancri-e","name":"55 Cancri e","aliases":["Janssen","55 Cnc e"],"attributes":{"type":"Exoplanet","location":"Milky Way","distance":41,"mass":4.772e+25,"radius":11950,"discovered":"2000s"},"clues":{"facts":["It is a super-Earth so close to its star that its year lasts under 18 hours.","It was once nicknamed the 'diamond planet'.","In 2024 JWST found hints of a thick atmosphere above its lava surface."]},"image":"assets/objects/55-cancri-e.jpg","imageCredit":"Illustration NASA, ESA, CSA, Ralf Crawford (STScI), Public domain (Wikimedia Commons)"},{"id":"k2-18b","name":"K2-18b","attributes":{"type":"Exoplanet","location":"Milky Way","distance":124,"mass":5.154e+25,"radius":16630,"discovered":"2010s"},"clues":{"facts":["It is a sub-Neptune in its red dwarf's habitable zone.","Water vapour was reported in its atmosphere in 2019.","Claims of a possible sign-of-life gas (DMS) there made headlines in 2025."]},"image":"assets/objects/k2-18b.jpg","imageCredit":"Illustration: NASA, ESA, CSA, Joseph Olmsted (STScI) Science: Nikku Madhusudhan (IoA), Public domain (Wikimedia Commons)"},{"id":"toi-700-d","name":"TOI-700 d","attributes":{"type":"Exoplanet","location":"Milky Way","distance":101.4,"mass":null,"radius":6836,"discovered":"2020s"},"clues":{"facts":["It is an Earth-sized planet in a red dwarf's habitable zone.","It was the first such planet found by NASA's TESS mission, announced in 2020.","Its star lies in the southern constellation Dorado."]},"image":"assets/objects/toi-700-d.jpg","imageCredit":"NASA's Goddard Space Flight Center, Public domain (Wikimedia Commons)"},{"id":"wasp-12b","name":"WASP-12b","attributes":{"type":"Exoplanet","location":"Milky Way","distance":1410,"mass":2.79e+27,"radius":135800,"discovered":"2000s"},"clues":{"facts":["It is so hot and close that its star is slowly eating it.","It is one of the darkest planets known, reflecting very little light.","Its orbit is shrinking, and it may be destroyed in a few million years."]},"image":"assets/objects/wasp-12b.jpg","imageCredit":"NASA, ESA, and G. Bacon (STScI), CC BY 4.0 (Wikimedia Commons)"},{"id":"milky-way","name":"Milky Way","aliases":["Milky Way Galaxy","The Galaxy"],"attributes":{"type":"Galaxy","location":"Local Group","distance":26670,"mass":2.287e+42,"radius":473000000000000000,"discovered":"Always visible"},"clues":{"facts":["It contains roughly 100 to 400 billion stars.","It is a barred spiral; the Sun takes about 230 million years to orbit its centre.","It is our home galaxy."]},"image":"assets/objects/milky-way.jpg","imageCredit":"ESO/Y. Beletsky, CC BY 4.0 (Wikimedia Commons)"},{"id":"andromeda-galaxy","name":"Andromeda Galaxy","aliases":["Andromeda","M31","Messier 31"],"attributes":{"type":"Galaxy","location":"Local Group","distance":2500000,"mass":2.983e+42,"radius":719000000000000000,"discovered":"Before 1600"},"clues":{"facts":["It is the most distant object most people can easily see with the naked eye.","It may merge with our own galaxy in a few billion years.","It is the largest galaxy in the Local Group."]},"image":"assets/objects/andromeda-galaxy.jpg","imageCredit":"Brody Wesner, CC0 (Wikimedia Commons)"},{"id":"triangulum-galaxy","name":"Triangulum Galaxy","aliases":["M33","Messier 33"],"attributes":{"type":"Galaxy","location":"Local Group","distance":2730000,"mass":9.942e+40,"radius":288600000000000000,"discovered":"1600s"},"clues":{"facts":["It is the third-largest galaxy in the Local Group.","Under very dark skies it may be the most distant thing visible to the naked eye.","It is a spiral galaxy close to the Andromeda Galaxy in the sky."]},"image":"assets/objects/triangulum-galaxy.jpg","imageCredit":"ESO, CC BY 4.0 (Wikimedia Commons)"},{"id":"large-magellanic-cloud","name":"Large Magellanic Cloud","aliases":["LMC"],"attributes":{"type":"Galaxy","location":"Local Group","distance":163000,"mass":2.744e+41,"radius":152300000000000000,"discovered":"Always visible"},"clues":{"facts":["It is a satellite galaxy of our own.","Supernova 1987A exploded inside it.","It is the bigger of two famous fuzzy patches in the far southern sky."]},"image":"assets/objects/large-magellanic-cloud.jpg","imageCredit":"NASA/Ames Research Center, Public domain (Wikimedia Commons)"},{"id":"small-magellanic-cloud","name":"Small Magellanic Cloud","aliases":["SMC"],"attributes":{"type":"Galaxy","location":"Local Group","distance":200000,"mass":1.293e+40,"radius":89400000000000000,"discovered":"Always visible"},"clues":{"facts":["It is a dwarf galaxy visible to the naked eye from the Southern Hemisphere.","Henrietta Leavitt used its pulsating stars to find a way to measure cosmic distances.","It is the lesser of two famous fuzzy patches in the far southern sky."]},"image":"assets/objects/small-magellanic-cloud.jpg","imageCredit":"ESA/Hubble and Digitized Sky Survey 2, CC BY 4.0 (Wikimedia Commons)"},{"id":"whirlpool-galaxy","name":"Whirlpool Galaxy","aliases":["M51","Messier 51","M51a"],"attributes":{"type":"Galaxy","location":"Beyond Local Group","distance":31000000,"mass":3.182e+41,"radius":359500000000000000,"discovered":"1700s"},"clues":{"facts":["It is tugging on a smaller companion galaxy, NGC 5195.","Lord Rosse first saw its spiral arms in 1845.","It is a classic face-on spiral near the handle of the Big Dipper."]},"image":"assets/objects/whirlpool-galaxy.jpg","imageCredit":"NASA and European Space Agency, Public domain (Wikimedia Commons)"},{"id":"sombrero-galaxy","name":"Sombrero Galaxy","aliases":["M104","Messier 104"],"attributes":{"type":"Galaxy","location":"Beyond Local Group","distance":31100000,"mass":1.591e+42,"radius":231800000000000000,"discovered":"1700s"},"clues":{"facts":["A thick dark dust lane cuts across its bright bulge.","It was discovered by Pierre Méchain in 1781.","It looks like a wide-brimmed Mexican hat."]},"image":"assets/objects/sombrero-galaxy.jpg","imageCredit":"ESA/Hubble & NASA, K. Noll, CC BY 4.0 (Wikimedia Commons)"},{"id":"pinwheel-galaxy","name":"Pinwheel Galaxy","aliases":["M101","Messier 101"],"attributes":{"type":"Galaxy","location":"Beyond Local Group","distance":20900000,"mass":1.988e+42,"radius":804200000000000000,"discovered":"1700s"},"clues":{"facts":["It is a large face-on spiral, wider than our own galaxy.","In 2023 a bright supernova, SN 2023ixf, appeared in it.","It lies in Ursa Major, near the handle of the Big Dipper."]},"image":"assets/objects/pinwheel-galaxy.jpg","imageCredit":"European Space Agency & NASA (K.D. Kuntz, F. Bresolin, J. Trauger, J. Mould, Y.-H. Chu; processing D. De Martin), CC BY 4.0 (Wikimedia Commons)"},{"id":"messier-87","name":"Messier 87","aliases":["M87","Virgo A"],"attributes":{"type":"Galaxy","location":"Beyond Local Group","distance":53500000,"mass":4.772e+42,"radius":624400000000000000,"discovered":"1700s"},"clues":{"facts":["It is a giant elliptical galaxy, one of the most massive nearby.","It shoots out a jet of plasma about 5,000 light-years long.","It hosts the first black hole ever photographed (2019)."]},"image":"assets/objects/messier-87.jpg","imageCredit":"en:NASA, en:STScI, en:WikiSky, Public domain (Wikimedia Commons)"},{"id":"centaurus-a","name":"Centaurus A","aliases":["NGC 5128"],"attributes":{"type":"Galaxy","location":"Beyond Local Group","distance":12000000,"mass":1.988e+42,"radius":458800000000000000,"discovered":"1800s"},"clues":{"facts":["It is one of the closest radio galaxies to Earth.","A dark band of dust crosses its bright round body.","It is thought to be the result of a merger between an elliptical and a spiral galaxy."]},"image":"assets/objects/centaurus-a.jpg","imageCredit":"ESO/WFI (Optical); MPIfR/ESO/APEX/A.Weiss et al. (Submillimetre); NASA/CXC/CfA/R.Kraft et al. (X-ray), CC BY 4.0 (Wikimedia Commons)"},{"id":"cigar-galaxy","name":"Cigar Galaxy","aliases":["M82","Messier 82"],"attributes":{"type":"Galaxy","location":"Beyond Local Group","distance":12000000,"mass":9.942e+40,"radius":175000000000000000,"discovered":"1700s"},"clues":{"facts":["It is a starburst galaxy, forming stars about 10 times faster than ours.","Seen edge-on, it looks long and thin.","A bright supernova, SN 2014J, appeared in it in 2014."]},"image":"assets/objects/cigar-galaxy.jpg","imageCredit":"NASA, ESA, and The Hubble Heritage Team (STScI/AURA), Public domain (Wikimedia Commons)"},{"id":"cartwheel-galaxy","name":"Cartwheel Galaxy","attributes":{"type":"Galaxy","location":"Beyond Local Group","distance":500000000,"mass":null,"radius":681200000000000000,"discovered":"1900–1949"},"clues":{"facts":["It formed when a smaller galaxy plunged through its centre.","Its bright outer ring is full of newborn stars.","JWST imaged it in 2022, showing a ring with spokes."]},"image":"assets/objects/cartwheel-galaxy.jpg","imageCredit":"ESA/Hubble & NASA, Public domain (Wikimedia Commons)"},{"id":"hoags-object","name":"Hoag's Object","aliases":["Hoag"],"attributes":{"type":"Galaxy","location":"Beyond Local Group","distance":600000000,"mass":null,"radius":473000000000000000,"discovered":"1950–1999"},"clues":{"facts":["It is a ring galaxy with a nearly perfect circle of blue stars.","Through the gap in its ring, another ring galaxy can be seen far behind.","It was found in 1950 and is named after its discoverer."]},"image":"assets/objects/hoags-object.jpg","imageCredit":"NASA and The Hubble Heritage Team (STScI/AURA); Acknowledgment: Ray A. Lucas (STScI/AURA), Public domain (Wikimedia Commons)"},{"id":"gn-z11","name":"GN-z11","attributes":{"type":"Galaxy","location":"Beyond Local Group","distance":13400000000,"mass":1.988e+39,"radius":6149000000000000,"discovered":"2010s"},"clues":{"facts":["For years it held the record for the most distant known galaxy.","Its light left it about 13.4 billion years ago.","Hubble found it in 2016, and JWST later studied it."]},"image":"assets/objects/gn-z11.jpg","imageCredit":"NASA, ESA, P. Oesch (Yale University), G. Brammer (STScI), P. van Dokkum (Yale University), and G. Illingworth (University of California, Santa Cruz), Public domain (Wikimedia Commons)"},{"id":"orion-nebula","name":"Orion Nebula","aliases":["M42","Messier 42"],"attributes":{"type":"Nebula","location":"Milky Way","distance":1344,"mass":3.977e+33,"radius":113500000000000,"discovered":"1600s"},"clues":{"facts":["It is the closest large star-forming region to Earth.","It is visible to the naked eye as a fuzzy 'star' in a famous hunter's sword.","It contains the Trapezium, a tight group of young hot stars."]},"image":"assets/objects/orion-nebula.jpg","imageCredit":"NASA, ESA, M. Robberto (Space Telescope Science Institute/ESA) and the Hubble Space Telescope Orion Treasury Project Team, Public domain (Wikimedia Commons)"},{"id":"crab-nebula","name":"Crab Nebula","aliases":["M1","Messier 1"],"attributes":{"type":"Nebula","location":"Milky Way","distance":6500,"mass":9.147e+30,"radius":52030000000000,"discovered":"1700s"},"clues":{"facts":["It is the remains of a star that was seen to explode in 1054.","A pulsar at its centre spins about 30 times a second.","It is the first entry in Charles Messier's catalogue."]},"image":"assets/objects/crab-nebula.jpg","imageCredit":"NASA, ESA, J. Hester and A. Loll (Arizona State University), Public domain (Wikimedia Commons)"},{"id":"eagle-nebula","name":"Eagle Nebula","aliases":["M16","Messier 16"],"attributes":{"type":"Nebula","location":"Milky Way","distance":5700,"mass":null,"radius":331100000000000,"discovered":"1700s"},"clues":{"facts":["It contains tall columns of gas where new stars are forming.","Hubble's 1995 'Pillars of Creation' image made it famous.","Its dark outline is said to look like a bird of prey."]},"image":"assets/objects/eagle-nebula.jpg","imageCredit":"ESO, CC BY 4.0 (Wikimedia Commons)"},{"id":"ring-nebula","name":"Ring Nebula","aliases":["M57","Messier 57"],"attributes":{"type":"Nebula","location":"Milky Way","distance":2570,"mass":null,"radius":6149000000000,"discovered":"1700s"},"clues":{"facts":["It is the glowing shell of gas thrown off by a dying Sun-like star.","It lies in the constellation Lyra, not far from Vega.","In small telescopes it looks like a glowing doughnut of gas."]},"image":"assets/objects/ring-nebula.jpg","imageCredit":"ESA/Webb, NASA, CSA, M. Barlow, N. Cox, R. Wesson, CC BY 4.0 (Wikimedia Commons)"},{"id":"helix-nebula","name":"Helix Nebula","aliases":["NGC 7293"],"attributes":{"type":"Nebula","location":"Milky Way","distance":655,"mass":null,"radius":13250000000000,"discovered":"1800s"},"clues":{"facts":["It is one of the closest planetary nebulae to Earth.","Its comet-shaped knots of gas are each larger than our Solar System.","Its look has earned it the nickname 'Eye of God'."]},"image":"assets/objects/helix-nebula.jpg","imageCredit":"NASA, ESA and the Hubble Helix Team, Public domain (Wikimedia Commons)"},{"id":"horsehead-nebula","name":"Horsehead Nebula","aliases":["Barnard 33"],"attributes":{"type":"Nebula","location":"Milky Way","distance":1375,"mass":null,"radius":16560000000000,"discovered":"1800s"},"clues":{"facts":["It is a dark cloud of dust seen against glowing red gas.","Williamina Fleming first spotted it on a photographic plate in 1888.","It sits just below Orion's Belt and looks like a chess knight."]},"image":"assets/objects/horsehead-nebula.jpg","imageCredit":"ESO, CC BY 4.0 (Wikimedia Commons)"},{"id":"carina-nebula","name":"Carina Nebula","aliases":["NGC 3372"],"attributes":{"type":"Nebula","location":"Milky Way","distance":8500,"mass":null,"radius":1088000000000000,"discovered":"1700s"},"clues":{"facts":["It is one of the largest bright nebulae in our sky.","It hosts one of the most massive and unstable star systems known.","Part of it appears in JWST's 2022 'Cosmic Cliffs' image."]},"image":"assets/objects/carina-nebula.jpg","imageCredit":"Harel Boren, CC BY-SA 4.0 (Wikimedia Commons)"},{"id":"lagoon-nebula","name":"Lagoon Nebula","aliases":["M8","Messier 8"],"attributes":{"type":"Nebula","location":"Milky Way","distance":4100,"mass":null,"radius":520300000000000,"discovered":"1600s"},"clues":{"facts":["It is a huge glowing cloud in Sagittarius, visible to the naked eye from dark sites.","A dark lane of dust runs through its middle.","It contains the Hourglass, a bright twisted cloud."]},"image":"assets/objects/lagoon-nebula.jpg","imageCredit":"ESO/VPHAS+ team, CC BY 4.0 (Wikimedia Commons)"},{"id":"cats-eye-nebula","name":"Cat's Eye Nebula","aliases":["NGC 6543"],"attributes":{"type":"Nebula","location":"Milky Way","distance":3300,"mass":null,"radius":1892000000000,"discovered":"1700s"},"clues":{"facts":["It is one of the most complex planetary nebulae known.","In 1864 it became the first planetary nebula whose spectrum was studied.","Hubble images show layered shells around a dying star in Draco."]},"image":"assets/objects/cats-eye-nebula.jpg","imageCredit":"ESA/Hubble & NASA, Z. Tsvetanov, CC BY 4.0 (Wikimedia Commons)"},{"id":"tarantula-nebula","name":"Tarantula Nebula","aliases":["30 Doradus"],"attributes":{"type":"Nebula","location":"Local Group","distance":160000,"mass":null,"radius":2838000000000000,"discovered":"1700s"},"clues":{"facts":["It is the most active star-forming region in the Local Group.","If it were as close as the Orion Nebula, it would cast shadows on Earth.","Its glowing filaments look like the legs of a spider."]},"image":"assets/objects/tarantula-nebula.jpg","imageCredit":"NASA, ESA, CSA, STScI, Webb ERO Production Team, Public domain (Wikimedia Commons)"},{"id":"pleiades","name":"Pleiades","aliases":["Seven Sisters","M45","Subaru"],"attributes":{"type":"Star cluster","location":"Milky Way","distance":444,"mass":1.591e+33,"radius":81360000000000,"discovered":"Always visible"},"clues":{"facts":["It is a young group of hot blue stars, about 100 million years old.","A Japanese car maker is named after it.","Most people can see about six of its stars with the naked eye, in Taurus."]},"image":"assets/objects/pleiades.jpg","imageCredit":"NASA, ESA, AURA/Caltech, Palomar Observatory, Public domain (Wikimedia Commons)"},{"id":"hyades","name":"Hyades","attributes":{"type":"Star cluster","location":"Milky Way","distance":153,"mass":7.954e+32,"radius":83250000000000,"discovered":"Always visible"},"clues":{"facts":["It is the nearest open star cluster to the Solar System.","Its brightest stars form a V shape in the sky.","It forms the face of the bull in Taurus, with Aldebaran in front of it."]},"image":"assets/objects/hyades.jpg","imageCredit":"NASA, ESA, and STScI, CC BY 4.0 (Wikimedia Commons)"},{"id":"beehive-cluster","name":"Beehive Cluster","aliases":["Praesepe","M44"],"attributes":{"type":"Star cluster","location":"Milky Way","distance":577,"mass":1.193e+33,"radius":108800000000000,"discovered":"Always visible"},"clues":{"facts":["It is an open cluster visible to the naked eye as a faint smudge.","Galileo was the first to see it as separate stars.","It lies in Cancer, between the Twins and the Lion."]},"image":"assets/objects/beehive-cluster.jpg","imageCredit":"Chuck Ayoub, CC0 (Wikimedia Commons)"},{"id":"omega-centauri","name":"Omega Centauri","aliases":["NGC 5139"],"attributes":{"type":"Star cluster","location":"Milky Way","distance":17090,"mass":7.954e+36,"radius":813600000000000,"discovered":"Before 1600"},"clues":{"facts":["It contains about 10 million stars.","It may be the core of a small galaxy swallowed by ours.","It is the largest and brightest globular cluster in our galaxy."]},"image":"assets/objects/omega-centauri.jpg","imageCredit":"Chuck Ayoub, CC0 (Wikimedia Commons)"},{"id":"hercules-cluster","name":"Hercules Cluster","aliases":["M13","Messier 13","Great Globular Cluster in Hercules"],"attributes":{"type":"Star cluster","location":"Milky Way","distance":22200,"mass":1.193e+36,"radius":681200000000000,"discovered":"1700s"},"clues":{"facts":["It is a globular cluster of several hundred thousand stars.","In 1974 the Arecibo message was beamed toward it.","It is the brightest globular cluster in the northern sky, found by Halley in 1714."]},"image":"assets/objects/hercules-cluster.jpg","imageCredit":"Chuck Ayoub, CC0 (Wikimedia Commons)"},{"id":"47-tucanae","name":"47 Tucanae","aliases":["NGC 104","47 Tuc"],"attributes":{"type":"Star cluster","location":"Milky Way","distance":14700,"mass":1.392e+36,"radius":567600000000000,"discovered":"1700s"},"clues":{"facts":["It is the second-brightest globular cluster in the sky.","It appears right next to the Small Magellanic Cloud in the sky.","Lacaille catalogued it in 1751, after it had been listed as a star."]},"image":"assets/objects/47-tucanae.jpg","imageCredit":"NASA, ESA, and the Hubble Heritage (STScI/AURA)-ESA/Hubble Collaboration, CC BY 4.0 (Wikimedia Commons)"},{"id":"sagittarius-a-star","name":"Sagittarius A*","aliases":["Sgr A*","Sagittarius A"],"attributes":{"type":"Black hole","location":"Milky Way","distance":26670,"mass":8.544e+36,"radius":12690000,"discovered":"1950–1999"},"clues":{"facts":["It is about 4 million times the mass of the Sun.","The Event Horizon Telescope released an image of it in 2022.","It sits at the centre of our galaxy."]},"image":"assets/objects/sagittarius-a-star.jpg","imageCredit":"EHT Collaboration, CC BY 4.0 (Wikimedia Commons)"},{"id":"m87-star","name":"M87*","aliases":["M87 black hole","Powehi"],"attributes":{"type":"Black hole","location":"Beyond Local Group","distance":53500000,"mass":1.293e+40,"radius":19200000000,"discovered":"1950–1999"},"clues":{"facts":["It is about 6.5 billion times the mass of the Sun.","In 2019 it became the first black hole ever photographed.","It sits at the heart of a giant elliptical galaxy in Virgo."]},"image":"assets/objects/m87-star.jpg","imageCredit":"Event Horizon Telescope, CC BY 4.0 (Wikimedia Commons)"},{"id":"cygnus-x-1","name":"Cygnus X-1","aliases":["Cyg X-1"],"attributes":{"type":"Black hole","location":"Milky Way","distance":7200,"mass":4.216e+31,"radius":62.61,"discovered":"1950–1999"},"clues":{"facts":["It is a stellar black hole pulling gas off a blue supergiant companion.","Stephen Hawking bet that it was not a black hole, and lost.","It was one of the first strong black hole candidates, found as an X-ray source in 1964."]},"image":"assets/objects/cygnus-x-1.jpg","imageCredit":"ESA, Hubble, Public domain (Wikimedia Commons)"},{"id":"gaia-bh1","name":"Gaia BH1","attributes":{"type":"Black hole","location":"Milky Way","distance":1560,"mass":1.913e+31,"radius":28.41,"discovered":"2020s"},"clues":{"facts":["It is the closest known black hole to Earth.","It is 'dormant': it is not feeding on its companion star.","It was found in 2022 from the wobble of a Sun-like star it pulls around."]},"image":"assets/objects/gaia-bh1.jpg","imageCredit":"PanSTARRS & Melina Thévenot, CC BY-SA 4.0 (Wikimedia Commons)"},{"id":"gaia-bh3","name":"Gaia BH3","attributes":{"type":"Black hole","location":"Milky Way","distance":1926,"mass":6.502e+31,"radius":96.57,"discovered":"2020s"},"clues":{"facts":["It is the most massive known stellar black hole in our galaxy.","It is about 33 times the mass of the Sun.","It was found by chance in 2024 while checking data from a European star-mapping satellite."]},"image":"assets/objects/gaia-bh3.jpg","imageCredit":"ESO/L. Calçada, CC BY 4.0 (Wikimedia Commons)"},{"id":"ton-618","name":"TON 618","aliases":["Ton 618"],"attributes":{"type":"Black hole","location":"Beyond Local Group","distance":10800000000,"mass":1.312e+41,"radius":194900000000,"discovered":"1950–1999"},"clues":{"facts":["It is one of the most massive black holes known, tens of billions of Suns.","It powers an extremely bright quasar.","It was first catalogued in 1970 as a faint bluish star."]},"image":"assets/objects/ton-618.jpg","imageCredit":"Sloan Digital Sky Survey, Apache Point Observatory, Astrophysical Research Consortium, CC BY 4.0 (Wikimedia Commons)"},{"id":"v404-cygni","name":"V404 Cygni","aliases":["V404 Cyg"],"attributes":{"type":"Black hole","location":"Milky Way","distance":7800,"mass":1.79e+31,"radius":26.58,"discovered":"1900–1949"},"clues":{"facts":["It is a black hole that flares up in outbursts every few decades.","Its 2015 outburst was one of the brightest X-ray events ever seen.","In 2019 its jets were seen wobbling like a spinning top."]},"image":"assets/objects/v404-cygni.jpg","imageCredit":"Andrew Beardmore (Univ. of Leicester) and NASA/Swift, Public domain (Wikimedia Commons)"}]