Only 55% of Americans know that the sun is a star.
986
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 moon is actually moving away from Earth at a rate of 1.5 inches per year.
236
The Earth gets heavier each day by tons, as meteoric dust settles on it.
118