Jupiter's moon Ganymede, is larger than the planet Mercury!
149
The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
13
Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
Only 55% of Americans know that the sun is a star.
986
The Earth gets 100 tons heavier every day due to falling space dust.
673
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
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
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121