Astronomer Percival Lowell believed that he was the first person to observe canals on Venus, but because of a faulty adjustment of the eyepiece on his telescope, he was in fact looking at the blood vessels in his own eye.
4
Jupiter's moon Ganymede, is larger than the planet Mercury!
149
There is a mass reservoir of water floating in space that is 100,000 times bigger than our sun and holds 140 trillion times more water than all of our oceans.
11
If two pieces of metal touch in space, they become permanently stuck together.
808
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
Earth is the only planet in our solar system that's not named after a god or goddess.
17
Some asteroids have other asteroids orbiting them.
131