Sound doesn't travel in space.
255
The volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178
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
Saturn's moon, Mimas, not only looks like the Death Star, it also has a Pac Man heat signature.
15
Approximately 115 tons of ocean salt spray enters the earth's atmosphere each second.
100
The heart of an astronaut actually gets smaller when in outer space.
216
More than 20 million meteoroids enter Earth's atmosphere every day.
139