There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
A neutron star (what remains after a Super Nova) is so dense that a portion of it the size of a sugar cube would weigh as much as all of humanity, or more than all the cars in the United States.
5
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
277
If you were to cry in space, the tears would form a bubble in your eye until it's so big it moves to another spot on your face.
10
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6