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Space Sun Microsystems Science

Astronomers Discover Alien World Hotter Than Most Stars (vanderbilt.edu) 59

Science_afficionado writes: An international team of astronomers has discovered a planet like Jupiter zipping around its host star every day and a half, boiling at temperatures hotter than most stars and sporting a giant, glowing gas tail like a comet. From a report via Vanderbilt University: "With a day-side temperature peaking at 4,600 Kelvin (more than 7,800 degrees Fahrenheit), the newly discovered exoplanet, designated KELT-9b, is hotter than most stars and only 1,200 Kelvin (about 2,000 degrees Fahrenheit) cooler than our own sun. In fact, the ultraviolet radiation from the star it orbits is so brutal that the planet may be literally evaporating away under the intense glare, producing a glowing gas tail. The super-heated planet has other unusual features as well. For instance, it's a gas giant 2.8 times more massive than Jupiter but only half as dense, because the extreme radiation from its host star has caused its atmosphere to puff up like a balloon. Because it is tidally locked to its star -- as the moon is to Earth -- the day side of the planet is perpetually bombarded by stellar radiation and, as a result, it is so hot that molecules such as water, carbon dioxide and methane can't form there." The findings have been published in the journal Nature.
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Astronomers Discover Alien World Hotter Than Most Stars

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  • Amazing. (Score:5, Funny)

    by Gravis Zero ( 934156 ) on Tuesday June 06, 2017 @04:40AM (#54557667)

    With a day-side temperature peaking at 4,600 Kelvin (more than 7,800 degrees Fahrenheit)

    I think they finally found the homeworld of AMD processors. ;)

    • Your joke is old and outdated.

      AMD Ryzens run much cooler compared to their Intel counterparts, unless you want to void your warranty and delid your Intel CPU:
      http://wccftech.com/intel-core... [wccftech.com]

      • It's just a joke. The only x86 chips I've used in the past decade have been AMD chips. I was disappointed when they added an equivalent of the IME and have begun seeking other avenues for processing.

      • by ACE209 ( 1067276 )

        Your joke is old and outdated.

        Not here. My AMD is the only thing keeping me warm in the winter. :)

    • With a day-side temperature peaking at 4,600 Kelvin (more than 7,800 degrees Fahrenheit)

      I think they finally found the homeworld of AMD processors. ;)

      And here I was thinking that this planet withdrew from the Paris Accord.

  • by Anonymous Coward

    If those numbers are correct and "density" refers to the mean density over the entire planet, then that would make this the largest planet ever discovered at 7.6 times the radius of Jupiter. As far as I can tell the record was HD 100546 b at 6.9 times the size of Jupiter. Odd that the neither the article nor the summary mentions breaking that record. In light of that, I have a suspicion that someone reported the numbers incorrectly and that it's only 1.8 times the mass of Jupiter. Maybe I missed it but I ca

  • by TheOuterLinux ( 4778741 ) on Tuesday June 06, 2017 @08:02AM (#54558397)
    Seriously. Look at the icons near the title.
  • I wonder if it was formed the same way. Something really big must have impacted that star prior to the start of the fusion reaction.
    • I wasn't aware that impact formation was a necessary or a sufficient condition for tidal locking to occur.

  • Seriously /. editor, what the f**k is that? Is "exoplanet" that hard to use? Even the cited link use the correct term.

  • "is hotter than most stars and only 1,200 Kelvin (about 2,000 degrees Fahrenheit) cooler than our own sun." Well, that all depends on where you take the Sun's temperature, or the temperature of any star. They're all hugely hotter near their core, because that's where the fusion is going on--as in 15 million degrees Celsius (or Kelvin, at that temp the diff between Celsius and Kelvin is negligible) at the Sun's core. (The Sun's corona is also much hotter.) I don't know whether the core of this planet is

Make it myself? But I'm a physical organic chemist!

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