Astronauts cannot burp in space.
232
Summer on Uranus lasts for 21 years.
358
Venus is the only planet that rotates clockwise.
310
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
Approximately 115 tons of ocean salt spray enters the earth's atmosphere each second.
100
Sound doesn't travel in space.
255
A comet's tail always points away from the sun.
2
41% of the moon is not visible from earth at any time.
103