Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
The earth rotates more slowly on its axis in March than in September.
145
Jupiter's magnetosphere is the largest single structure inside the Solar System. If you could see it with your eyes, it would appear larger than our full Moon.
8
If two pieces of metal touch in space, they become permanently stuck together.
808
Astronomer Percival Lowell believed that he was the first person to observe canals on Venus, but because of a faulty adjustment of the eyepiece on his telescope, he was in fact looking at the blood vessels in his own eye.
4
Jupiter is bigger than all the other planets combined.
254
The heart of an astronaut actually gets smaller when in outer space.
216