The heart of an astronaut actually gets smaller when in outer space.
216
It 'snows' metal on Venus.
13
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
The population of the Earth has more than doubled since 1950.
151
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
There is a mass reservoir of water floating in space that is 100,000 times bigger than our sun and holds 140 trillion times more water than all of our oceans.
11
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