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
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
The earth rotates more slowly on its axis in March than in September.
145
One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
277
There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124
The Earth gets 100 tons heavier every day due to falling space dust.
673
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