Astronauts cannot burp in space.
232
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
On Titan, Saturn's largest moon, the atmosphere is so thick and the gravity so low that humans could fly through it by flapping "wings" attached to their arms.
7
The Earth gets 100 tons heavier every day due to falling space dust.
673
Jupiter is bigger than all the other planets combined.
254
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
There are two golf balls sitting on the moon.
721