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
Summer on Uranus lasts for 21 years.
358
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46