An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
A comet's tail always points away from the sun.
2
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
The light hitting the earth right now is 30 thousand years old.
163
There's a mysterious dwarf planet between Mars and Jupiter called 'Ceres' which has never been visited by spacecraft or photographed in detail, however, Earth-bound telescopes reveal a large bright shining spot on the surface of this planet, the origin and nature of which are unknown.
5
41% of the moon is not visible from earth at any time.
103
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