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
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
Jupiter's moon Ganymede, is larger than the planet Mercury!
149
If aliens located 60-65 million light years away from us, looked at earth through a really powerful telescope today, they would see dinosaurs!
18
The Earth gets heavier each day by tons, as meteoric dust settles on it.
118
The moon is actually moving away from Earth at a rate of 1.5 inches per year.
236