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
Scientists have confirmed that Enceladus, one of Saturn’s moons, has a watery ocean.
6
One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
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An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
Summer on Uranus lasts for 21 years.
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