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
The typical spec of dust that you see floating in the air is half way in size between the Earth and a subatomic particle.
131
The Earth gets 100 tons heavier every day due to falling space dust.
673
There are 5 to 10 times more stars in the known Universe than there are grains of sand on all the world's beaches, but a single grain of sand has more atoms than there are stars in the known Universe.
20
Saturn's moon, Mimas, not only looks like the Death Star, it also has a Pac Man heat signature.
15
More than 20 million meteoroids enter Earth's atmosphere every day.
139
A comet's tail always points away from the sun.
2
41% of the moon is not visible from earth at any time.
103