All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
More than 20 million meteoroids enter Earth's atmosphere every day.
139
A comet's tail always points away from the sun.
2
The light hitting the earth right now is 30 thousand years old.
163
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
The earth is .02 degrees hotter during a full moon.
157
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
Some asteroids have other asteroids orbiting them.
131