In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
Jupiter's magnetosphere is the largest single structure inside the Solar System. If you could see it with your eyes, it would appear larger than our full Moon.
8
The heart of an astronaut actually gets smaller when in outer space.
216
One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
277
The earth is .02 degrees hotter during a full moon.
157
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
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