HD 209458b: Is it a comet or a planet?

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http://www.itwire.com – How about a planet that acts like a comet! The Hubble Space Telescope has found planet HD 209458b. NASA says it is a gas giant that is so close to its star—about 4 million miles away—that its atmosphere is escaping into space so fast that the created winds look like a sweeping tail of a comet.   (IT news)