Mars had an oxygen-rich atmosphere around 4 billion years ago
13
The moon is actually moving away from Earth at a rate of 1.5 inches per year.
236
Earth is the only planet in our solar system that's not named after a god or goddess.
17
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
Pluto is smaller than Russia.
9
Not only are there rogue planets floating through space completely alone, not orbiting any stars, but it’s possible that these pitch-black lonely planets support life.
14
One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
277
Venus is the only planet that rotates clockwise.
310