Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
The sun is 330,330 times larger than the earth!
190
The Earth gets heavier each day by tons, as meteoric dust settles on it.
118
On Titan, Saturn's largest moon, the atmosphere is so thick and the gravity so low that humans could fly through it by flapping "wings" attached to their arms.
7
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
It takes eight and a half minutes for light to get from the sun to earth.
159
Neil Armstrong, the first man to step foot on the moon, carried with him a piece of cloth and wood from the original 1903 Wright Flyer.
12