One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
277
A 100-pound person on Earth would weigh 38 pounds on Mars.
102
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
The light hitting the earth right now is 30 thousand years old.
163
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 density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
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
The volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178