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 Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
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
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
Approximately 115 tons of ocean salt spray enters the earth's atmosphere each second.
100
Venus is the only planet that rotates clockwise.
310
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121