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Mimas

The Columbia Encyclopedia, 6th ed. | 2011 | Copyright

Mimas , in astronomy, one of the named moons, or natural satellites, of Saturn . Also known as Saturn I (or S1), Mimas is 244 mi (392 km) in diameter, orbits Saturn at a mean distance of 115,275 mi (185,520 km), and has equal orbital and rotational periods of 0.942 earth days. Mimas was discovered by the English astronomer Sir William Herschel in 1789. Its low density (1.17) indicates that it is composed mostly of water ice with only a small amount of rocky material. The surface is saturated with impact craters. The largest by far—called Herschel—has a diameter of more than 80 mi (130 km), almost a third the diameter of the entire satellite; the walls of this crater are about 3 mi (5 km) high, parts of the floor are about 6 mi (10 km) deep, and the central peak towers almost 4 mi (6 km) above the floor of the crater. Fractures can be seen on the opposite side of Mimas that may have resulted from the same impact. Mimas forms a satellite pair with Tethys ; that is, the two moons interact gravitationally.

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Mimas

A Dictionary of Astronomy | 1997 | Copyright

Mimas The seventh-closest satellite of Saturn, distance 185 600 km, orbital period 0.942 days; also known as Saturn I. Its axial rotation period is the same as its orbital period. It is 418 × 392 × 383 km in diameter, and was discovered in 1789 by F. W.Herschel. Most of its surface is densely covered with impact craters. One of these, named Herschel, is 130 km across, nearly one-third of the satellite's diameter, and has a large, high central peak. The impact that caused this crater must have nearly split the satellite apart.

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Mimas

A Dictionary of Earth Sciences | 1999 | | Copyright

Mimas (Saturn I) One of the major satellites of Saturn, with a radius of 198.8 km; mass 0.375 × 10²⁰ kg; mean density 1140 kg/m³; visual albedo 0.5. It was discovered in 1789 by Sir William Herschel.

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AILSA ALLABY and MICHAEL ALLABY. "Mimas." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 28 May. 2012 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "Mimas." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 28, 2012). http://www.encyclopedia.com/doc/1O13-Mimas.html

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Mimas

Oxford Dictionary of Rhymes | 2007 | Copyright

Mimas •Lammas • Cadmus • Las Palmas •chiasmus, Erasmus •Nostradamus •famous, ignoramus, Seamus, shamus •Polyphemus, Remus •grimace • Michaelmas •Christmas, isthmus •litmus •animus, equanimous, magnanimous, pusillanimous, unanimous •anonymous, eponymous, Hieronymus, pseudonymous, synonymous •Septimus •Mimas, primus, thymus, timeous •Thomas •enormous, ginormous •brumous, hummus, humous, humus, spumous, strumous •blasphemous •bigamous, polygamous, trigamous •endogamous, monogamous •calamus, hypothalamus, thalamus •venomous •autonomous, bonhomous, heteronomous •Pyramus •dichotomous, hippopotamus, trichotomous •Thermos

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