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
Approximately 115 tons of ocean salt spray enters the earth's atmosphere each second.
100
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
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
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
Jupiter is bigger than all the other planets combined.
254
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82