There are two golf balls sitting on the moon.
721
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
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
The earth rotates more slowly on its axis in March than in September.
145
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
13
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
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