The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
13
If you were to cry in space, the tears would form a bubble in your eye until it's so big it moves to another spot on your face.
10
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
There are more nerve cells in the human brain than there are stars in the Milky Way.
349