Summer on Uranus lasts for 21 years.
358
One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
277
41% of the moon is not visible from earth at any time.
103
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
The volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
Jupiter's moon Ganymede, is larger than the planet Mercury!
149