If you went out into space, you would explode before you suffocated because there's no air pressure.
149
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Today's top fuel dragsters take off with more force than the space shuttle.
120
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
A comet's tail always points away from the sun.
2
The earth rotates more slowly on its axis in March than in September.
145
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175