In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
The heart of an astronaut actually gets smaller when in outer space.
216
The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
13
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
The last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
10
The sun is 330,330 times larger than the earth!
190
It 'snows' metal on Venus.
13
Scientists have confirmed that Enceladus, one of Saturn’s moons, has a watery ocean.
6