In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
Buzz Aldrin’s mother’s maiden name was Moon.
9
The last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
10
Venus is the only planet that rotates clockwise.
310
There are 5 to 10 times more stars in the known Universe than there are grains of sand on all the world's beaches, but a single grain of sand has more atoms than there are stars in the known Universe.
20
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
Mars had an oxygen-rich atmosphere around 4 billion years ago
13