A comet's tail always points away from the sun.
2
In the last 7 years, humanity has discovered 43 potentially habitable planets.
14
Astronauts get taller when they are in space.
224
The population of the Earth has more than doubled since 1950.
151
Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
Approximately 115 tons of ocean salt spray enters the earth's atmosphere each second.
100
If you were to cry in space, the tears would form a bubble in your eye until it's so big it moves to another spot on your face.
10
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15