Jan. 28, 2009 -- Astronomers have found a planet with a galactic case of hot flashes. In just six hours, this planet four times the size of Jupiter heats up by more than 1,200 degrees, according to a study published in Thursday's issue of the journal Nature. "It's the first observation of changing weather" on a planet outside our solar system, said study author Gregory Laughlin, an astronomy professor at the University of California at Santa Cruz. He used NASA's Spitzer Space Telescope to study the planet. Change is a mild way to put it for the lifeless world, called HD80606b, where the word "mild" would never enter a weather forecast. Normally, the planet is a toasty 980 degrees or so. But in the few hours it whips around its sun the planet gets zapped with mega-heat, pushing the thermometer closer to 2,240 degrees. During its brief close pass to its sun, the planet is 10 times nearer its star than Mercury is to our sun. When it comes closest to its star, it becomes one giant "brewing storm" complete with shock waves, Laughlin said. The radiation bombarding the planet is 800 times stronger than when it is farthest away. Related Content: Get the Latest in Science and Tech News From Discovery How Stuff Works: Spitzer Space Telescope Earth Got Off to Hot Start Then just as quickly, the planet slingshots away and radiates the heat to the cool vacuum of space. It glows cherry red and the temperature plummets, Laughlin said. "Utterly bizarre," he said. "It is thoroughly completely uninhabitable. In a galaxy of uninhabitable planets, this one stands out as being completely inhospitable to life." The planet circles its star -- the larger of two stars in a binary system -- in a comet-like orbit in just 111 days. The star is visible from Earth near the Big Dipper. On Feb. 14, HD80606b will travel between the Earth and its star. There's a 15 percent chance that amateur astronomers using small telescopes could see it swing by, obscuring a tiny part of the star, Laughlin said. "This is indeed an oddball planet, where the temperature range of the season changes from hellish to super-hellish," said Carnegie Institution astronomer Alan Boss. "This place makes Venus look like a nice place to live and that is saying something." Related Links: Get More NewsSpiders, Scorpions Among World's Oldest CreaturesMany creepy crawlies have been on Earth much longer than previously believed.Blood-Sucking Vampire Bats Sing DuetsWhite-winged vampire bats "harmonize" with separated roost mates.Oldest Hebrew Writing Possibly FoundAncient inscriptions on a 3,000-year-old pottery shard could make history.Rare, Prehistoric-Age Reptile Found in N.Z.A tuatara has been spotted on the New Zealand mainland for the first time in 200 years.Iceman Has No Living RelativesOetzi, the 5,300 year-old frozen mummy, left no living genetic legacy.SLIDE SHOW: Landscapes of TerrorWhat makes a place feel scary? There are scientific explanations.It's Official: People Are Warming the PolesHumans are conclusively to blame for polar warming, say scientists.Eight-Armed Animal Preceded DinosaursWhat may be one of Earth's first animals was no bigger than a coaster and had eight arms.Phoenicians Live on in People's GenesOne in 17 Mediterranean men may be descended from ancient Phoenicians.Pesticides, Fertilizers Linked to Frog DeclineA pesticide is found to promote parasites among amphibians.Hubble Telescope Taking Photos AgainThe Hubble Space Telescope is once again snapping stunning photos of the universe.Andean Mummy Hairs Show Hallucinogen UseScientists find direct evidence of hallucinogenic drug use among ancient Andeans.Opals on Mars Reveal Planet's Long Wet PastOpals found on Mars suggest the planet has been wet for much longer. |
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