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 100-pound person on Earth would weigh 38 pounds on Mars.
102
Scientists have confirmed that Enceladus, one of Saturn’s moons, has a watery ocean.
6
The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
The population of the Earth has more than doubled since 1950.
151
Venus is the only planet that rotates clockwise.
310
Jupiter's moon Ganymede, is larger than the planet Mercury!
149