A comet's tail always points away from the sun.
2
The moon is actually moving away from Earth at a rate of 1.5 inches per year.
236
The typical spec of dust that you see floating in the air is half way in size between the Earth and a subatomic particle.
131
Jupiter is bigger than all the other planets combined.
254
If you went out into space, you would explode before you suffocated because there's no air pressure.
149
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Only 55% of Americans know that the sun is a star.
986
An international team of astronomers has spotted the farthest known gravitational lens and, as Albert Einstein predicted, it is a galaxy that deflects and intensifies the light of a much further object.
9