Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
A lightning bolt generates temperatures five times hotter than those found at the sun's surface!
127
A 100-pound person on Earth would weigh 38 pounds on Mars.
102
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
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
13
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175