A comet's tail always points away from the sun.
2
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
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 rotates more slowly on its axis in March than in September.
145
It 'snows' metal on Venus.
13
The typical spec of dust that you see floating in the air is half way in size between the Earth and a subatomic particle.
131
The light hitting the earth right now is 30 thousand years old.
163