The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
Some asteroids have other asteroids orbiting them.
131
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
41% of the moon is not visible from earth at any time.
103
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
The Earth gets 100 tons heavier every day due to falling space dust.
673
Saturn's moon, Mimas, not only looks like the Death Star, it also has a Pac Man heat signature.
15
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82