Extrasolar Gas Giants
See also: Hot JupiterBecause of the limited techniques currently available to detect extrasolar planets, many of those found to date have been of a size associated, in our solar system, with gas giants. Because these large planets are inferred to share more in common with Jupiter than with the other gas giant planets, some have claimed that "jovian planet" is a more accurate term for them. Many of the extrasolar planets are much closer to their parent stars and hence much hotter than gas giants in the solar system, making it possible that some of those planets are a type not observed in our solar system. Considering the relative abundances of the elements in the universe (approximately 98% hydrogen and helium) it would be surprising to find a predominantly rocky planet more massive than Jupiter. On the other hand, previous models of planetary system formation suggested that gas giants would be inhibited from forming as close to their stars as have many of the new planets that have been observed.
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Famous quotes containing the words gas and/or giants:
“Man moves in all modes, by legs of horses, by wings of winds, by steam, by gas of balloon, by electricity, and stands on tiptoe threatening to hunt the eagle in his own element.”
—Ralph Waldo Emerson (1803–1882)
“But can see better there, and laughing there
Pity the giants wallowing on the plain.
...
Pygmies expand in cold impossible air,
Cry fie on the giantshine, poor glory which
Pounds breast-bone punily, screeches, and has
Reached no Alps: or, knows no Alps to reach.”
—Gwendolyn Brooks (b. 1917)