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
The earth rotates more slowly on its axis in March than in September.
145
41% of the moon is not visible from earth at any time.
103
Scientists have confirmed that Enceladus, one of Saturn’s moons, has a watery ocean.
6
The heart of an astronaut actually gets smaller when in outer space.
216
The population of the Earth has more than doubled since 1950.
151