Neil Armstrong, the first man to step foot on the moon, carried with him a piece of cloth and wood from the original 1903 Wright Flyer.
12
Summer on Uranus lasts for 21 years.
358
Jupiter is bigger than all the other planets combined.
254
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