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
Summer on Uranus lasts for 21 years.
358
If two pieces of metal touch in space, they become permanently stuck together.
808
The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
The sun is 330,330 times larger than the earth!
190
Some asteroids have other asteroids orbiting them.
131
The earth is .02 degrees hotter during a full moon.
157
Lightning strikes about 6,000 times per minute on this planet!
158