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 volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178
The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
13
One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
277
Jupiter is bigger than all the other planets combined.
254
Astronauts cannot burp in space.
232
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
It 'snows' metal on Venus.
13