A comet's tail always points away from the sun.
2
Sound doesn't travel in space.
255
The sun puts out more power in 1 second than mankind has ever used within human existence.
14
Approximately 115 tons of ocean salt spray enters the earth's atmosphere each second.
100
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 weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175