A comet's tail always points away from the sun.
2
If NASA sent birds into space they would soon die; they need gravity to swallow.
146
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Saturn's moon, Mimas, not only looks like the Death Star, it also has a Pac Man heat signature.
15
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
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
In 1859, the largest known geomagnetic storm struck the Caribbean, causing an aurora and telegraphs could even operate without a power source.
25