More than 20 million meteoroids enter Earth's atmosphere every day.
139
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
An international team of astronomers has spotted the farthest known gravitational lens and, as Albert Einstein predicted, it is a galaxy that deflects and intensifies the light of a much further object.
9
In the last 7 years, humanity has discovered 43 potentially habitable planets.
14
The earth rotates more slowly on its axis in March than in September.
145
Astronauts cannot burp in space.
232
41% of the moon is not visible from earth at any time.
103
Astronauts get taller when they are in space.
224