Sat·urn (s ăt ərn)
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n.1. Roman Mythology The god of agriculture. 2. The sixth planet from the sun and the second largest in the solar system, having a sidereal period of revolution about the sun of 29.5 years at a mean distance of about 1.43 billion kilometers (891 million miles), a mean diameter of approximately 121,000 kilometers (75,000 miles), and a mass 96 times that of Earth.
[Middle English Saturnus, from Old English, from Latin Sāturnus, of Etruscan origin.] (click for a larger image) Saturnphotographed by the Hubble Space Telescope in 1998 |