Uranus has the coldest planetary atmosphere in the solar system.

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Saturn’s moon Titan may harbor a very salty ocean.

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The dark side of the moon is actually turquoise.

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The Sun is the most perfectly round natural object in the universe.

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More than two thousand years ago, the Babylonians were able to calculate that there were 38 possible eclipses or syzygys within a period of 223 months: that is, about 18 years. This period of 223 months is called a Saros cycle by modern astronomers, and a sequence of eclipses separated by a Saros cycle constitutes a Saros series.

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