Summer on Uranus lasts for 21 years.
358
There are two golf balls sitting on the moon.
721
The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
13
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
In the last 7 years, humanity has discovered 43 potentially habitable planets.
14
Sound doesn't travel in space.
255
Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160