In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
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
Sound doesn't travel in space.
255
The sun puts out more power in 1 second than mankind has ever used within human existence.
14