The volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178
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
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124
The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
Astronauts get taller when they are in space.
224
A neutron star (what remains after a Super Nova) is so dense that a portion of it the size of a sugar cube would weigh as much as all of humanity, or more than all the cars in the United States.
5
If you went out into space, you would explode before you suffocated because there's no air pressure.
149