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Medium-sized moons of Saturn shown alongside Earth's Moon.
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Original Windows to the Universe artwork by Randy Russell using images courtesy NASA.

Medium-sized Moons of Saturn

Saturn has moons. Many of those are tiny chunks of rock or ice only a few kilometers (miles) across. One of Saturn's moons, Titan, is much larger than the rest and is amongst the largest moons in our entire Solar System.

Midway in size between Titan and the many tiny moonlets are several medium-sized moons. The image on this page shows the mid-sized moons of Saturn. They are, in order from largest to smallest: Rhea, Iapetus, Dione, Tethys, Enceladus, Mimas, Hyperion, Phoebe, Janus, Prometheus, Epimetheus and Pandora. The picture also shows Earth's Moon for size comparison.

Last modified June 7, 2004 by Randy Russell.

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Titan

Titan is the largest moon of Saturn, and the second largest moon in the entire Solar System (Jupiter's moon Ganymede is the largest). Titan's diameter is 5,150 km (3,200 miles), which is comparable to...more

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Rhea

Rhea was discovered by G. Cassini in 1672. Rhea is the 5th farthest moon from Saturn, with a standoff distance of 527,040 km. It is one of the icy moons, similar to the Galilean satellites. Rhea is about...more

Dione

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Tethys

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Enceladus

Enceladus is the sixth largest moon of Saturn. It was discovered in 1789 by the British astronomer William Herschel (who also discovered the planet Uranus). Enceladus is a medium-sized moon made primarily...more

Hyperion

Hyperion was discovered by W. Bond in 1848. Hyperion is the 3rd farthest moon from Saturn, with a standoff distance of 1,481,000 km. Hyperion is 175 x 100 km (117 x 67 miles) in size. Its dimensions make...more

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Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part is sponsored in part through grants from federal agencies (NASA and NOAA), and partnerships with affiliated organizations, including the American Geophysical Union, the Howard Hughes Medical Institute, the Earth System Information Partnership, the American Meteorological Society, the National Center for Science Education, and TERC. The American Geophysical Union and the American Geosciences Institute are Windows to the Universe Founding Partners. NESTA welcomes new Institutional Affiliates in support of our ongoing programs, as well as collaborations on new projects. Contact NESTA for more information. NASA ESIP NCSE HHMI AGU AGI AMS NOAA