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Encke's Comet |
Also found in: Wikipedia, Hutchinson | 0.15 sec. |
Encke's CometFaint comet having the shortest orbital period (about 3.3 years) of any known, first observed in 1786. It was the second comet (after Halley's Comet) to have its period determined (1819), by Johann Franz Encke (1791–1865). Encke also found that the comet's period decreases by about 2¹⁄₂ hours in each revolution and showed that this effect could not be explained by the planets' gravitational influence. Its period continues to decrease, though more slowly, and appears to be related to the effects of outgassing. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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