factjuice / space

Facts about Space

1,044 topics in this category

Planets, stars, missions, and the very large void. 1,044 topics. Squeeze any one of them for a fresh fact.

3C 273 51 Pegasi Accretion Disk Achernar Active Galactic Nucleus Ahuna Mons Akari Space Telescope Akatsuki Alan Bean Alan Shepard Alan Shepard Mission Albedo Effect on Planets Albireo Aldebaran Aldhibain Aldrin Cycler Alexei Leonov Alexei Yeliseyev Algenib Algieba Alioth Aljanah Alkaid Alkarab Alkes Almach Alnath Alnilam Alnitak Alpha Centauri Alpha Centauri B Alphecca Alpheratz Alrescha Altair Altjira Anatoly Berezovoy Anatoly Filipchenko Andrian Nikolayev Andriyan Nikolayev Andromeda Constellation the Andromeda Galaxy André Kuipers Antares Antennae Galaxies Antimatter Production Apollo 1 the Apollo 11 mission Apollo 11 Moon Landing Apollo 13 Apollo 15 Apollo 17 Apollo 8 Apollo 8 Earthrise Photo Apollo Lunar Landing the Apollo Program Apophis Apophis Asteroid Aquarius Constellation Aquila Constellation Ara Constellation Arcturus Ariane 5 Ariane 5 Launch History Ariel's Cryovolcanism Ariel's Fault Scarps Aries Constellation Armstrong and Aldrin Moon Landing Arp 220 Arp 273 Arp 286 Arp 299 the Artemis Program Asimov's Laws of Robotics ASKAP the Asteroid Belt Asteroid Belt Origin Asteroid Bennu Astrobiology Astrobiology and Extremophiles Astronaut Training Astronauts Astrosat Atom For Peace Galaxy Auriga Constellation the Aurora (Northern/Southern Lights)Baby Boom Galaxy Baikonur Cosmodrome Barnard's Galaxy Barnard's Star Baryon Acoustic Oscillations Baryonic Matter Becklin-Neugebauer Object Bennu Bennu Asteroid Sample Return BepiColombo Betelgeuse Betelgeuse Star the Big Bang Bill Anders Binary Black Hole Mergers Binary Stars Black Eye Galaxy Black Hole at Center of Milky Way Black Hole Cygnus X-1 Black Hole Evaporation Black Hole Information Paradox Black Hole M87 Black Hole Mass Measurement Black Hole Mergers Black Hole Thermodynamics Black Holes Blazars Blitzar Phenomenon Blue Origin Blue Origin New Shepard Blue Supergiant Bode's Galaxies Bootstrap Paradox Borasisi Boris Chertok Boris Volynov Boris Yegorov Boötes Constellation Breakthrough Starshot Brown Dwarf Brown Dwarf Stars Buzz Aldrin Callisto Callisto's Impact Basins Callisto's Surface Age Callisto's Valhalla Basin Camelopardalis Constellation Cancer Constellation Canes Venatici Constellation Canis Major Constellation Canis Minor Constellation Canopus Capricornus Constellation Cargo Dragon Carina Nebula Carl Sagan and the Planets Carl Sagan's Cosmos Documentary Caroline Herschel in Astronomy Cartwheel Galaxy Cassini Cassini Mission Cassini-Huygens Mission Cassini-Huygens Mission to Saturn Cassiopeia Constellation Castor Centaurus A Galaxy Centaurus Constellation Cepheus Constellation Ceres Ceres Dwarf Planet Cetus Constellation Chandra Observatory Chandrasekhar Limit Chang'e-3 Chang'e-4 Chang'e-5 Chaos Charles Duke Charon Charon, Moon of Pluto Chelyabinsk Meteor Chicxulub Crater Chris Hadfield Christer Fuglesang Cigar Galaxy Circumstellar Disks Columba Constellation Columbus Coma Berenices Constellation Comet Galaxy Comet Hale-Bopp Comet Halley Comets Constellations Corona Borealis Constellation CoRoT Space Telescope Corvus Constellation Cosmic Background Radiation Cosmic Background Radiation Discovery Cosmic Eye Galaxy Cosmic Inflation Cosmic Inflation Theory the Cosmic Microwave Background Cosmic Microwave Background Radiation Cosmic Ray Research Cosmic Rays Cosmic Shear Cosmic String Theory Cosmic Voids Cosmonaut Yuri Gagarin Cosmonauts the Crab Nebula Crab Pulsar Crater Constellation Crew Dragon Crewed Interplanetary Travel Crux Constellation Cthulhu Macula Cupola Curiosity the Curiosity Rover Curiosity Rover Mars Mission Cygnus A Cygnus Constellation Dark Energy Dark Energy Discovery Dark Energy Surveys Dark Matter Dark Matter and Dark Energy Dark Matter Experiments Dark Matter Halo David Scott Deep Space Network Deimos Deke Slayton Delta Cephei Deneb Destiny Diamond Planet Diamond Rain on Neptune Discovery of Neptune Donn Eisele Draco Constellation Drake Equation Dumbbell Nebula Dwarf planet definition Dysnomia Dyson Sphere the Eagle Nebula Earth Earth's Magnetosphere Ed Mitchell Ed White Einstein's Cross Einstein-Rosen Bridge EmDrive Thruster Enceladus Enceladus Geysers Enceladus's Geysers Enceladus's Ice Fountains Enceladus's Water Chemistry Encke Comet Epsilon Aurigae Epsilon Eridani Eridanus Constellation Eris Eris's 2005 discovery Eris's methane surface Eros ESA Huygens Landing Eugene Cernan Europa (Jupiter's moon)Europa Clipper Europa Moon Europa's Ice Shell Europa's Possible Biosphere Europa's Radiation Environment Europa: Moon of Jupiter the European Space Agency EUVE Event Horizon Event Horizon Telescope Event Horizon Telescope Image of a Black Hole Event Horizons Evgeny Khrunov Exoplanet Atmosphere Exoplanet Discovery Techniques Exoplanet GJ 1214b Exoplanet K2-18b Exoplanet Kepler-452b Exoplanets Expansion of the Universe Extraterrestrial Intelligence Signal Extraterrestrial Microbe Extreme Ultraviolet Variability Experiment Extremophiles in Space Faint Young Sun Paradox Falcon 9 Farthest Galaxies Discovered FAST Fast Radio Bursts Fermi Gamma-ray Space Telescope Fireworks Galaxy Fomalhaut Fomalhaut b Fomalhaut b Exoplanet Fomalhaut Planetary System Fornax Constellation Fountains of Enceladus Frank Borman Gaia Space Observatory Gaia Space Telescope Galactic Collision Galactic Disk Warp Galactic Habitable Zone Galactic Halo Structure Galaxies Galaxy Superclusters Galilean Moons Galileo Galileo Galilei Astronomy Galileo Galilei's Jupiter Observations Galileo Galilei's Observations Galileo Mission The Galileo Probe Galileo Spacecraft Gamma-Ray Bursts Ganymede Ganymede's Grooved Terrain Ganymede's Magnetosphere Ganymede's Subsurface Ocean Gaspra Gemini 12 Gemini 7 Gemini 8 Gemini Constellation Gemini Observatory Geminids Meteor Shower Gennady Padalka Georgy Beregovoy Georgy Dobrovolsky Georgy Grechko Geostationary Orbit Gherman Titov Giant Impact Hypothesis Gliese 273 Gliese 667 Goddard Space Flight Center Goldilocks Zone Gonggong Gonggong's coloration Gordo Cooper Gravitational Lens Gravitational Microlensing Gravitational Waves Gravitational Waves Detection Gravity Assist Gravity Assist Maneuver Gravity Waves Great Attractor Great Red Spot Great Red Spot of Jupiter Gus Grissom Habitability Index Habitable Zone Habitable Zone Exoplanets Hadar Halley's Comet Halton Arp's Atlas Hanny's Voorwerp Harrison Schmitt Haulani Crater Haumea Haumea's discovery narrative Haumea's rapid rotation Hayabusa2 Mission HD 209458 Heliopause Heliosphere Boundary Heliospheric Current Sheet Helium Flash Helix Nebula Herbig-Haro Objects Hercules A Hercules Constellation Herschel Space Telescope Hiaka Hiisi Hipparcos Hoag's Object Hobby-Eberly Telescope Holmberg 15A Horologium Constellation Horsehead Nebula Hot Jupiters Hubble Deep Field the Hubble Space Telescope Hubble Tuning Fork Hubble Ultra Deep Field Huya Huygens Probe Hyades Star Cluster Hydra Hydra Constellation Hydrogen Alpha Hypervelocity Stars Iapetus's Equatorial Ridge IC 1101 Ice Giant Composition Ida Infrared Space Observatory the Ingenuity Helicopter InSight INTEGRAL Space Observatory Intercosmos program Intergalactic Medium International Dark-Sky Association the International Space Station International Space Station Construction Interplanetary Magnetic Field Interstellar Medium Interstellar Molecular Cloud Interstellar Object 'Oumuamua Io (Jupiter's moon)Io Volcanism Io's Lava Lakes Io's Plasma Torus Io's Sulfur Volcanoes Ion Engine ISS (International Space Station)ISS American Segment ISS Assembly Sequence ISS Canadian Segment ISS European Segment ISS Experiments ISS Japanese Segment ISS Node Modules ISS Permanent Occupation ISS Resupply Logistics ISS Russian Segment ISS Truss Assembly Itokawa IUE Ixion Ixion's orbital resonance IXPE James Irwin the James Webb Space Telescope Jim Lovell Jodrell Bank Observatory John Glenn John Glenn Mission John Young Jovian Magnetosphere Juno Juno Jupiter Mission Juno Mission Juno Spacecraft Jupiter Jupiter's Auroras Jupiter's Great Red Spot Jupiter's Magnetosphere Kapteyn Star Kardashev Scale Kashiherios Katherine Johnson - NASA Mathematician Kennedy Space Center Kepler Exoplanet Discoveries Kepler Exoplanet Mission the Kepler Mission Kepler Spacecraft Discoveries Kepler Telescope Missions Kepler-16b Kepler-452 Kepler-452b Kessler Syndrome Kibo Kilonova Kilonova Explosion Kitt Peak National Observatory Konstantin Feoktistov Konstantin Tsiolkovsky the Kuiper Belt Kuiper Belt composition Kuiper Belt Objects Kuiper Cliff Kármán Line L2 Lagrange Point La Silla Observatory Laika Lambertian Reflectance Laniakea Supercluster Large Magellanic Cloud Lensing Time Delay Lensonian Structure Leo Constellation Leo Triplet Leonardo Libra Constellation Lick Observatory Light Year Light Years LISA Gravitational Wave Observatory LISA Mission LISA Pathfinder Mission Lithium Problem Lobachevsky Space LOFAR Lovell Telescope Lowell Observatory Lucy Luminosity Class Luna 2 Luna 3 Mission Luna program Lunar Crater Plato Lunar Eclipses Lunar Effects on Earth Lunar Libration Lunar Magma Ocean Lunar Mare Lunar Mare Basalt Lunar Maria Lunar Module Eagle Lunar Reconnaissance Orbiter Lunar Regolith Lunar Silicate Volcanism Lunar South Pole Lunar South Pole Atlas Lunar Synchronous Orbit Lunar Volcanism Lunar Water Ice Lupus Constellation Luyten 726-8 Lynx Arc Lyra Constellation M87 Magellan Telescopes the Magellanic Clouds Magnetohydrodynamic Turbulence Magnetosphere Makemake Makemake's methane ice Makemake's thermal properties Mariner 10 Markarian 231 Mars Mars Curiosity Rover Mars Dust Storms Mars Habitat Design Mars Helicopter Ingenuity Mars Odyssey Mars Opportunity Rover Mars Opposition Mars Rover Perseverance Mars Rovers Mars Sample Return Mission Mars's Olympus Mons Mars's Polar Caps Mars's Valles Marineris Martian Ice Caps Massive Black Hole Formation Mathilde Mauna Kea Observatory MAVEN Mayall's Object McDonald Observatory MeerKAT Mercury (the planet)Mercury Surface Temperatures Mercury's Heavily Cratered Surface Mercury's Solar Wind Mercury-Atlas 7 Mercury-Atlas 9 Mercury-Redstone 3 MESSENGER Mission to Mercury Messier 106 Messier 109 Messier 110 Messier 31 Messier 83 Messier 87 Black Hole Messier 88 Messier 95 Messier 96 Messier Objects Meteor Showers on Earth Meteorites Meteors Mice Galaxies Michael Collins Microlensing the Milky Way Milky Way Bar Structure Milky Way Barred Spiral Milky Way Galaxy Mimas's Herschel Crater Mir Mir Construction Timeline Mir Core Module Mir Extended Operations Mir Kvant 1 Mir Kvant 2 Mir Priroda Mir Resupply Missions Mir Spektr Mira Miranda's Canyon System Miranda's Extreme Topography Mission Control Center Moscow Mizar Mono Lake Alien Life Monoceros Constellation the Moon Mount Sharp Mars Mount Wilson Observatory Mrk 501 Mstislav Keldysh the Multiverse Namaka NASA NASA DART Mission NASA Juno Mission Nauka Nebular Hypothesis Needle Galaxy Neil Armstrong Neil Armstrong Apollo 11 Neil Armstrong Biography Neptune Neptune's Dark Spots Neptune's Great Dark Spot Neptune's Wind Patterns Neutrino Detection Neutron Star Neutron Star Collision Neutron Star Collisions Neutron Star Crust Neutron Star Formation Neutron Star Merger Neutron Stars New Horizons New Horizons Mission New Horizons Pluto New Horizons Pluto flyby NGC 1068 NGC 1277 NGC 253 NGC 4151 Nix Non-Solar Nebula Noosphere Norgay Montes NuSTAR Oberon's Ancient Terrain Oberon's Cratering Record Oberth Effect Observable Universe Size Occator Crater OJ 287 Oleg Kononenko Oleg Leonov Oleg Makarov Omega Centauri the Oort Cloud Ophiuchus Supercluster Ophiuchus Supernova Remnant Opportunity Orbital Resonance Orcus Orcus's orbital characteristics Origin of Gold in the Universe Orion Orion Arm the Orion Constellation the Orion Nebula OSIRIS-REx OSIRIS-REx Asteroid Mission OSIRIS-REx Mission Oxygen Isotope Ratio Pale Blue Dot Pale Blue Dot Photo Pallas Parker Solar Probe Parsecs Pavel Belyayev Pavel Popovich Pegasus Constellation Peggy Whitson Perseus Constellation Perseverance the Perseverance Rover Pete Conrad Phantom Galaxy Philae Phobos (Mars's moon)Phobos's Orbit Decay Phobos's Surface Composition the Pillars of Creation Pinwheel Galaxy Pioneer 10 Pioneer 10 and 11 Pioneer 11 Pioneer Anomaly Pioneer Plaque Pioneering Venus Program Pioneers of X-ray Astronomy Pisces Constellation PKS 2349-014 Planck Planck Heinz Nusser Effect Planck Length in Cosmology Planck Space Telescope Planetary Magnetosphere Planetary Nebula Planetary Ring Dynamics Planetary Transit Method Planetary Transits Pleiades Star Cluster Plutino classification Pluto Pluto's 2006 demotion Pluto's Demotion to Dwarf Planet Pluto's nitrogen ice plains Polaris (the North Star)Pollux Praamzius Prichal Procyon Procyon B Proton rocket family Protoplanetary Disc Evolution Protoplanetary Disk Proxima Centauri Proxima Centauri b Psyche Pulsar Pulsar PSR B1913+16 Pulsar PSR B1919+21 Pulsar Timing Arrays Pulsars Pyotr Klimuk Quaoar Quasar Quasars Quest R-7 rocket Radio Bursts from Deep Space Radio Galaxies Rakesh Sharma Rassvet Red Dwarf Star Red Dwarf Stars Red Giant Stars Red Supergiant Antares Redshift Redshift and Blueshift Regulus Rhadamanthus Rhea's Possible Rings Rigel Ring Nebula Ring Systems of Saturn Ringenator Ringworld Rogue Planets Roman Space Telescope Ronald Evans ROSAT Roscosmos Rosetta and Philae Mission Rosetta Comet Mission Ross 154 Ross 248 Ryugu Ryugu Asteroid Sagan Series (Carl Sagan)Sagan Standard Sagan Stardust Theory Sagittarius A*Sagittarius Constellation Sagittarius Dwarf Galaxy Salacia Sally Ride Salyut 1 Salyut 2 Salyut 3 Salyut 4 Salyut 5 Salyut 6 Salyut 7 Salyut Docking System Salyut First Generation Salyut program Salyut Second Generation Salyut Space Stations Samantha Cristoforetti Saros Cycle Satellite Drag Coefficient Saturn Saturn V Saturn's Cassini Division Saturn's E Ring Saturn's Hexagonal Vortex Saturn's Ring Particles Saturn's Rings Saturn's Rings Structure Scattered Disk objects Schwarzschild Radius Scorpius Constellation Scott Carpenter Sculptor Constellation Scutum Constellation Sedna Sedna's extreme aphelion Sergei Avdeyev Sergei Korolev Serpens Constellation Sextans Constellation SGR A*Shapley Supercluster Shaula Shenzhou 15 Shenzhou 5 Singularities Sirius Sirius B Sirius Star System Skylab Skylab Airlock Module Skylab Apollo Telescope Mount Skylab Docking Adapter Skylab Parasol Skylab Program Skylab Repair Missions Skylab Workshop Small Magellanic Cloud Sojourner Solar Corona Solar Cycle Solar Dynamo Theory Solar Eclipses Solar Flare Solar Flare of September 1859 Solar Flares Solar Sail Technology Solar Storms Solar Wind the Sombrero Galaxy Southern African Large Telescope Soviet astronaut training methods Soviet cosmonaut selection process Soviet dog space program Soviet EVA suit engineering Soviet extravehicular activity techniques Soviet orbital rendezvous procedures Soviet Orbital Station Soviet satellite program Soviet spacecraft docking systems Soviet spaceflight medicine Soyuz 1 mission Soyuz 11 mission Soyuz 3 mission Soyuz 4 mission Soyuz 5 mission Soyuz MS Soyuz MS-11 Soyuz program Soyuz rocket family Soyuz TM-32 Soyuz-TMA Space Debris Space Debris Management Space Debris Mitigation Space Elevator Space Elevator Concept Space Fountain Space Launch System the Space Shuttle Space Shuttle Atlantis Space Shuttle Challenger Space Shuttle Columbia Space Shuttle Discovery Space Station Freedom Space Tourism Space Weathering SpaceX SpaceX Dragon SpaceX Falcon 9 SpaceX Falcon Heavy SpaceX Falcon Heavy Launch SpaceX Starship Spaghettification Spica Spindle Galaxy Spirit Spirit and Opportunity Rovers Spirit Rover Sputnik 1 Sputnik Planitia Sputnik program Stellar Nucleosynthesis Stellar Parallax Stephan's Quintet Stephen Hawking Contributions to Astrophysics Styx the Sun Sunflower Galaxy Sunrise Arc Super Earth Exoplanet Supergiant Stars Supermassive Black Hole Supermassive Black Holes Supernova 1987A Supernovae Sutherland Observatory Suzaku Svetlana Savitskaya Swift Gamma-Ray Burst Mission Tabby's Star Tachyon Theory Tadpole Galaxy Tardigrade Space Survival Tardigrades in Space Tau Ceti Tau Ceti System Tau Herculid Meteor Shower Taurus Constellation Taurus Dark Cloud TESS Theia Impact Hypothesis Thermonuclear Supernova Thorium Moon Exploration Thuban Star Tiangong 1 Tiangong 2 Tiangong 3 Tiangong Crewed Missions Tiangong Program Tianzhou 1 Titan Titan (Saturn's moon)Titan Sand Dunes Titan's Methane Cycle Titan's Nitrogen Atmosphere Titan's Organic Molecules Titania's Fault Networks Titania's Impact History Titius-Bode Law Tombaugh Region Tranquility Trans-Neptunian Object Trans-Neptunian Scattering the TRAPPIST-1 System Triangulum Constellation the Triangulum Galaxy Triton's Cantaloupe Terrain Triton's Cryovolcanoes Triton's Retrograde Orbit Tunguska Event 1908 Type II Supernova Typhon Ultra-Diffuse Galaxies Umbriel's Crater Density Umbriel's Surface Features Unity Universal Rotation Curve Uranus Uranus's Axial Tilt Uranus's Faint Rings Uranus's Rotation Ursa Major Ursa Major Constellation Ursa Minor Valentin Lebedev Valentina Tereshkova Valentina Tereshkova Mission Valery Ryumin Valles Marineris Valles Marineris on Mars Van Allen Belt Vanth Varda Varda's reflectivity Varuna Vega Veil Nebula Venera 13 Venus Venus Atmosphere Venus Atmospheric Pressure Venus Express Mission Venus Transit Venus Transit 2012 Venus's Cloud Patterns Venus's Retrograde Spin Venus's Sulfuric Clouds Venusian Atmospheric Anomalies Venusian Geological Formations Vera C. Rubin Observatory Vera Rubin Astrophysicist Vernal Equinox Vesta Viking 1 Viking 2 Viking Mars Missions Viktor Patsayev Virgin Galactic SpaceShipTwo Virgo Constellation Virgo Supercluster Vitaly Sevastyanov Vladimir Dzhanibekov Vladimir Komarov Vladimir Lyakhov Vladimir Shatalov Vladislav Volkov VLT (Very Large Telescope)Voskhod 1 mission Voskhod 2 mission Voskhod program Vostok 1 mission Vostok 6 mission Vostok program Voyager 1 Voyager 1 Golden Record Voyager 2 Voyager 2 Interstellar Mission Voyager Golden Record Voyager Interstellar Mission Wally Schirra Wally Schirra Missions Walt Cunningham Weywot Whale Galaxy Whirlpool Galaxy White Dwarf White Dwarf Mass Limit White Dwarf Stars WISE Wolf 359 Wolf-Lundmark-Melotte Galaxy Wolf-Rayet Stars Wow! Signal X-Ray Binary Systems Xiangliu XRISM Yang Liwei Yerkes Observatory Yuri Gagarin Yuri Gagarin Mission Yuri Malenchenko Yuri Romanenko Zarya Zeta Aurigae Zhurong the Zodiac Zond program Zvezda