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
A car traveling 100 mph would take more than 29 million years to reach the nearest star (to our solar system)
88
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
It takes eight and a half minutes for light to get from the sun to earth.
159
41% of the moon is not visible from earth at any time.
103