It takes eight and a half minutes for light to get from the sun to earth.
159
The population of the Earth has more than doubled since 1950.
151
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
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
Some asteroids have other asteroids orbiting them.
131
The earth rotates more slowly on its axis in March than in September.
145
If you went out into space, you would explode before you suffocated because there's no air pressure.
149