Astronauts get taller when they are in space.
224
Some asteroids have other asteroids orbiting them.
131
41% of the moon is not visible from earth at any time.
103
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
Summer on Uranus lasts for 21 years.
358
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.
6
The light hitting the earth right now is 30 thousand years old.
163
If you went out into space, you would explode before you suffocated because there's no air pressure.
149