Sound doesn't travel in space.
255
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
MDIF, a New York based non-profit organisation, is planning to beam free Wi-Fi to the entire world from space.
18
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
From the nitrogen in our DNA, to the calcium in our teeth, the iron in our blood, to the carbon in our apple pies - all were made in the interiors of collapsing stars; we're all made of stardust.
22
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
277