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
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
The volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178
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
The last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
10
It takes eight and a half minutes for light to get from the sun to earth.
159
There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124
The heart of an astronaut actually gets smaller when in outer space.
216