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
Summer on Uranus lasts for 21 years.
358
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
More than 20 million meteoroids enter Earth's atmosphere every day.
139
The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
If you were to cry in space, the tears would form a bubble in your eye until it's so big it moves to another spot on your face.
10
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121