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
If you went out into space, you would explode before you suffocated because there's no air pressure.
149
The earth rotates more slowly on its axis in March than in September.
145
A comet's tail always points away from the sun.
2
The light hitting the earth right now is 30 thousand years old.
163
Some asteroids have other asteroids orbiting them.
131
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
Venus is the only planet that rotates clockwise.
310