Pluto is smaller than Russia.
9
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
It 'snows' metal on Venus.
13
Astronauts get taller when they are in space.
224
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
The volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178
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
Astronomer Percival Lowell believed that he was the first person to observe canals on Venus, but because of a faulty adjustment of the eyepiece on his telescope, he was in fact looking at the blood vessels in his own eye.
4