Mars had an oxygen-rich atmosphere around 4 billion years ago
13
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
The heart of an astronaut actually gets smaller when in outer space.
216
Astronauts cannot burp in space.
232
Summer on Uranus lasts for 21 years.
358
Buzz Aldrin’s mother’s maiden name was Moon.
9
There is a mass reservoir of water floating in space that is 100,000 times bigger than our sun and holds 140 trillion times more water than all of our oceans.
11
Scientists have confirmed that Enceladus, one of Saturn’s moons, has a watery ocean.
6