Scientists have confirmed that Enceladus, one of Saturn’s moons, has a watery ocean.
6
Summer on Uranus lasts for 21 years.
358
If you went out into space, you would explode before you suffocated because there's no air pressure.
149
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
If two pieces of metal touch in space, they become permanently stuck together.
808
The heart of an astronaut actually gets smaller when in outer space.
216
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219