Browse
All Facts
11,491 facts. Click any fact to see its full page.
All 11,491
📜 History 1,991
🔬 Science 1,964
🐾 Animals 1,525
🚀 Space 977
🧠 Psychology 893
🌿 Nature 759
💻 Technology 735
🌍 Geography 599
🎭 Culture 581
🫀 Human Body 572
🌊 Ocean 373
💬 Language 245
🍕 Food 199
✨ General 68
✨ Dinosaur 10
Europa Clipper, launching in 2024, will study Jupiter's icy moon for signs of habitability.
The Deep Impact mission fired a copper impactor into Comet Tempel 1 in 2005 to study its interior.
Mars has two tiny moons — Phobos and Deimos — so small that gravity on Phobos is 1/1000th of Earth's.
The Rosetta spacecraft tracked Comet 67P for 2 years, witnessing outgassing, jets, and seasonal changes.
The first planet discovered orbiting another star in the habitable zone is Kepler-452b — 1,400 light-years away.
Spacecraft navigating between planets use gravity assists — slingshotting around planets to gain speed.
The WISE telescope discovered thousands of previously unknown asteroids, comets, and brown dwarf stars.
China's Tianhe space station became operational in 2021 — the first time a country operated its own space station alone.
The gravitational wave event GW150914 in 2015 was the first direct detection — caused by two black holes merging.
Stargazing at night is literally looking back in time — you see stars as they were years, centuries, or millennia ago.
The first reusable spacecraft was NASA's Space Shuttle — it flew 135 missions over 30 years.
The Lunar Reconnaissance Orbiter has mapped the Moon to a resolution of 0.5 meters.
The Genesis mission collected solar wind particles and returned them to Earth in 2004.
Mars's Olympus Mons is so wide that if you stood at its center, the edges would be beyond the horizon.
The first animal to orbit Earth was a Soviet dog named Laika in 1957 — she did not survive.
The Saturn V rocket that took humans to the Moon remains the most powerful rocket ever flown.
The total number of humans who have been to space is approximately 650.
The Juno spacecraft orbits Jupiter's poles — no spacecraft had previously done this.
The Apollo 13 mission was crippled by an oxygen tank explosion — the crew survived by using the lunar module as a lifeboat.
China became only the third country to independently send humans to space in 2003.
Sputnik 1, the first satellite, had a lifespan of only 3 months before burning up in the atmosphere.
The Mir space station hosted astronauts continuously for nearly 10 years.
NASA's DART mission intentionally crashed into an asteroid in 2022 — successfully altering its orbit.
The Arecibo message, sent in 1974, was a binary-coded message toward a star cluster 25,000 light-years away.
The Huygens probe landed on Saturn's moon Titan in 2005 — the most distant landing ever achieved.
The Chandrayaan-1 mission discovered water ice on the Moon in 2008.
The first spacewalk lasted 12 minutes — Alexei Leonov nearly couldn't re-enter due to his spacesuit inflating.
Deep Space 1 tested an ion drive in space in 1998 — the technology now propels spacecraft to the outer solar system.
The Opportunity Mars rover was designed to last 90 days — it operated for 15 years.
The Pioneer 10 spacecraft, launched in 1972, was the first to travel through the asteroid belt.
Perseverance rover collected rock samples for potential return to Earth — the first extraterrestrial sample return from Mars.
The first Mars helicopter, Ingenuity, was planned for 5 test flights — it has completed over 70.
The MESSENGER spacecraft orbited Mercury for 4 years before crashing into the surface in 2015.
The Moon's surface temperature swings from −173°C at night to 127°C during the day.
Astronauts on the ISS experience 16 sunrises and sunsets per day.
The first space station was Soviet Salyut 1 — launched in 1971, it was occupied for 23 days.
The Viking landers in 1976 were the first spacecraft to successfully operate on Mars's surface.
Mars has seasons because its axis is tilted 25° — similar to Earth's 23.5° tilt.
The Parker Solar Probe has come closer to the Sun than any spacecraft — within 6.1 million km.
The Kepler Space Telescope found that 22% of sun-like stars have an Earth-size planet in the habitable zone.
SpaceX's Starship is the most powerful rocket ever built — capable of lifting 100–150 tons to low Earth orbit.
The New Horizons flyby of Pluto revealed mountains of water ice 3,500 meters tall.
China's Yutu-2 rover is the first to explore the Moon's far side — it's been operating since 2019.
The Soviet Venera probes survived on Venus's surface for up to 127 minutes before being destroyed by heat.
The James Webb Space Telescope cost $10 billion and took 30 years to build.
The Cassini spacecraft orbited Saturn for 13 years before being deliberately crashed into the planet in 2017.
The Mars Curiosity rover has driven over 28 km on Mars since landing in 2012.
The Hubble Space Telescope has made over 1.5 million observations since its 1990 launch.
The Apollo program employed 400,000 engineers, scientists, and technicians at its peak.
The concept of 'dignity' as an inherent human right is a relatively recent philosophical and legal development.