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Space Facts
977 facts in Space. Click any fact to see its full page.
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🌍 Geography 599
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🌊 Ocean 373
💬 Language 245
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✨ General 68
✨ Dinosaur 10
A day on Venus is longer than a year on Venus — it rotates so slowly that it completes an orbit before one full rotation.
If the Sun were a hollow sphere, about 1.3 million Earths could fit inside it.
Earth is the only planet not named after a god in Roman or Greek mythology.
Roughly 4% of the universe is made of ordinary matter — the rest is dark matter and dark energy.
The Voyager 1 probe, launched in 1977, is the farthest human-made object from Earth.
Pluto is smaller than the United States in surface area.
The ISS travels at 17,500 mph, orbiting Earth about 16 times per day.
There may be a diamond planet — 55 Cancri e is thought to be largely composed of carbon in diamond form.
The universe is estimated to be 13.8 billion years old.
The Milky Way galaxy smells like rum and tastes like raspberries, according to astronomers who detected ethyl formate near the galactic center.
One day on Jupiter lasts only about 10 hours — it has the shortest day of any planet.
The Sun makes up 99.86% of the total mass of the solar system.
Space is completely silent — there is no medium to carry sound waves.
Jupiter's Great Red Spot is a storm that has been raging for at least 350 years.
There are more stars in the observable universe than grains of sand on all of Earth's beaches.
Saturn's moon Titan has lakes and rivers — but they're made of liquid methane, not water.
The largest volcano in the solar system, Olympus Mons on Mars, is three times the height of Everest.
Light from the Sun takes about 8 minutes and 20 seconds to reach Earth.
Neutron stars are so dense that a teaspoon of their material would weigh about a billion tons.
The footprints on the Moon will last for millions of years — there's no wind to erode them.
A day on Venus is longer than a year on Venus.
Most of the universe is empty space.
You exist during a brief moment in cosmic history.
Some galaxies are billions of light-years away.
The universe continues expanding.
Most stars in the universe are older than humanity.
The Sun will eventually burn out billions of years from now.
The Sun is about 4.6 billion years old.
The Milky Way galaxy is about 100,000 light-years wide.
Human civilization represents a tiny fraction of cosmic time.
Earth formed about 4.5 billion years ago.
The universe is about 13.8 billion years old.
You are seeing some stars as they existed millions of years ago.
Light from distant galaxies takes billions of years to reach Earth.
There are more stars in the universe than grains of sand on Earth.
Each galaxy contains billions or trillions of stars.
The observable universe contains an estimated 2 trillion galaxies.
The U.S. military tested detonating nuclear bombs in space during the Cold War.
Space itself is expanding everywhere at once.
The universe has no known center.
Most of the universe is made of unknown dark matter and dark energy.
If you fell into a black hole, time would appear to stop for outside observers.
Space is not completely empty and contains particles.
You can fit one million Earths inside the Sun.
The Moon is slowly moving away from Earth every year.
There are rocks on Earth older than Saturn’s rings.
Some black holes may contain the mass of billions of Suns.
The Moon has enough helium‑3 to potentially power Earth for thousands of years.
Astronauts can grow taller in space due to spinal expansion.
Some stars you see in the sky no longer exist.