A comet's tail always points away from the sun.
2
From the nitrogen in our DNA, to the calcium in our teeth, the iron in our blood, to the carbon in our apple pies - all were made in the interiors of collapsing stars; we're all made of stardust.
22
One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
277
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
If two pieces of metal touch in space, they become permanently stuck together.
808
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
According to a study by the National Science Foundation, only half of Americans believe in evolution, and one in 4 don't know that the Earth orbits the Sun.
14