Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Venus is the only planet that rotates clockwise.
310
Some asteroids have other asteroids orbiting them.
131
Earth is the only planet in our solar system that's not named after a god or goddess.
17
It 'snows' metal on Venus.
13
Jupiter's magnetosphere is the largest single structure inside the Solar System. If you could see it with your eyes, it would appear larger than our full Moon.
8
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
The earth is .02 degrees hotter during a full moon.
157