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
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
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
MDIF, a New York based non-profit organisation, is planning to beam free Wi-Fi to the entire world from space.
18
A comet's tail always points away from the sun.
2
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
If NASA sent birds into space they would soon die; they need gravity to swallow.
146