A comet's tail always points away from the sun.
2
There are two golf balls sitting on the moon.
721
An international team of astronomers has spotted the farthest known gravitational lens and, as Albert Einstein predicted, it is a galaxy that deflects and intensifies the light of a much further object.
9
The population of the Earth has more than doubled since 1950.
151
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.
4
The Earth gets 100 tons heavier every day due to falling space dust.
673
The heart of an astronaut actually gets smaller when in outer space.
216