If two pieces of metal touch in space, they become permanently stuck together.
808
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
It takes eight and a half minutes for light to get from the sun to earth.
159
The Earth gets heavier each day by tons, as meteoric dust settles on it.
118
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121