The typical spec of dust that you see floating in the air is half way in size between the Earth and a subatomic particle.
131
Sound doesn't travel in space.
255
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 last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
10
Jupiter's moon Ganymede, is larger than the planet Mercury!
149
If you went out into space, you would explode before you suffocated because there's no air pressure.
149
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
The volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178