Sound doesn't travel in space.
255
More than 20 million meteoroids enter Earth's atmosphere every day.
139
Jupiter has radio storms so strong that they can be picked up and heard by an AM radio.
16
If you went out into space, you would explode before you suffocated because there's no air pressure.
149
The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
147
The Earth gets 100 tons heavier every day due to falling space dust.
673
On Titan, Saturn's largest moon, the atmosphere is so thick and the gravity so low that humans could fly through it by flapping "wings" attached to their arms.
7