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 Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
Astronauts cannot burp in space.
232
The earth rotates more slowly on its axis in March than in September.
145
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
An international team of astronomers has spotted the farthest known gravitational lens and, as Albert Einstein predicted, it is a galaxy that deflects and intensifies the light of a much further object.
9
Pluto is smaller than Russia.
9