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Amalthea
Amalthea The third-closest satellite of Jupiter, distance 181 400 km, orbital period 0.498 days; also known as Jupiter V. Its axial rotation period is the same as its orbital period. Amalthea was discovered in 1892 by E. E.Barnard. It is noticeably elongated, measuring 250 × 146 × 128 km. Its surface is heavily scarred by impact craters, the largest 90 km wide. The surface has a very low albedo, 0.09, and is distinctly reddish, possibly because of sulphur from Io's volcanoes. Spacecraft measurements yield a mean density of 0.86 g/cm3, indicating a porous structure rich in water ice.
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"Amalthea." A Dictionary of Astronomy. 1997. Encyclopedia.com. 11 Feb. 2012 <http://www.encyclopedia.com>. "Amalthea." A Dictionary of Astronomy. 1997. Encyclopedia.com. (February 11, 2012). http://www.encyclopedia.com/doc/1O80-Amalthea.html "Amalthea." A Dictionary of Astronomy. 1997. Retrieved February 11, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O80-Amalthea.html |
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Amalthea
Amalthea (Jupiter V) The jovian satellite with the closest orbit to Jupiter. Its surface colour is reddish, apparently because of sulphur emitted from Io. Its diameter is 189 km (262 × 146 × 134 km), the irregular shape suggesting a rigid body. Its mass is 7.17 × 1018 kg; mean distance from Jupiter 181 000 km. It radiates more heat than it receives from the Sun.
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AILSA ALLABY and MICHAEL ALLABY. "Amalthea." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 11 Feb. 2012 <http://www.encyclopedia.com>. AILSA ALLABY and MICHAEL ALLABY. "Amalthea." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (February 11, 2012). http://www.encyclopedia.com/doc/1O13-Amalthea.html AILSA ALLABY and MICHAEL ALLABY. "Amalthea." A Dictionary of Earth Sciences. 1999. Retrieved February 11, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-Amalthea.html |
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Amalthea
Amalthea in Greek mythology, the she-goat who suckled the infant Zeus when he was hidden to protect him from his father Cronus; Amalthea's horn is another name for the cornucopia or horn of plenty.
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ELIZABETH KNOWLES. "Amalthea." The Oxford Dictionary of Phrase and Fable. 2006. Encyclopedia.com. 11 Feb. 2012 <http://www.encyclopedia.com>. ELIZABETH KNOWLES. "Amalthea." The Oxford Dictionary of Phrase and Fable. 2006. Encyclopedia.com. (February 11, 2012). http://www.encyclopedia.com/doc/1O214-Amalthea.html ELIZABETH KNOWLES. "Amalthea." The Oxford Dictionary of Phrase and Fable. 2006. Retrieved February 11, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O214-Amalthea.html |
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Amalthea
Amalthea , in astronomy, one of the 39 known moons, or natural satellites, of Jupiter . |
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"Amalthea." The Columbia Encyclopedia, 6th ed.. 2008. Encyclopedia.com. 11 Feb. 2012 <http://www.encyclopedia.com>. "Amalthea." The Columbia Encyclopedia, 6th ed.. 2008. Encyclopedia.com. (February 11, 2012). http://www.encyclopedia.com/doc/1E1-Amalthea.html "Amalthea." The Columbia Encyclopedia, 6th ed.. 2008. Retrieved February 11, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-Amalthea.html |
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