The earth rotates more slowly on its axis in March than in September.
145
In the last 7 years, humanity has discovered 43 potentially habitable planets.
14
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
The last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
10
41% of the moon is not visible from earth at any time.
103
The light hitting the earth right now is 30 thousand years old.
163