Q:

Who discovered the first four moons of Saturn?

A:

Quick Answer

The first four of Saturn's moons were discovered by Christiaan Huygens and Giovanni Domenico Cassini between 1655 and 1684. As of 2014, Saturn has 53 confirmed moons and nine provisional moons.

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Full Answer

Huygens discovered only Titan, the first moon discovered, in 1655. Cassini discovered the next four moons, finding Iapetus in 1671, Rhea in 1672 and both Dione and Tethys in 1684. William Herschel discovered two moons, Mimas and Enceladus, in 1789.

Additional astronomers brought the total of discovered moons to 18 by the time NASA launched the Cassini-Huygens mission in 1997, responsible for discovering many of the remaining moons. Saturn's largest moon is Titan.

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