Earth is the only planet in our solar system that's not named after a god or goddess.
17
Sound doesn't travel in space.
255
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
Jupiter's magnetosphere is the largest single structure inside the Solar System. If you could see it with your eyes, it would appear larger than our full Moon.
8
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
If two pieces of metal touch in space, they become permanently stuck together.
808
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6