Sound doesn't travel in space.
255
It 'snows' metal on Venus.
13
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
The light hitting the earth right now is 30 thousand years old.
163
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160