The heart of an astronaut actually gets smaller when in outer space.
216
The light hitting the earth right now is 30 thousand years old.
163
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Some asteroids have other asteroids orbiting them.
131
The volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178
If two pieces of metal touch in space, they become permanently stuck together.
808
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
Scientists have confirmed that Enceladus, one of Saturn’s moons, has a watery ocean.
6