cross-posted from: https://lemmy.ca/post/48332762

A new analysis of decades’ worth of observations has revealed that Uranus does indeed emit more heat than it receives from the rays of the Sun.

  • MJKee9@lemmy.world
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    2 days ago

    All i thought of when i saw this pic: great! another upgrade for “two pair”…

  • jaybone@lemmy.zip
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    3 days ago

    So what causes this? The article doesn’t really say. Even though other gas giants do this too. What’s the theory on this?

    • toynbee@lemmy.world
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      2 days ago

      The innuendo was kind of fun for a few comments, but thank you for finally asking the question that was the reason I opened this thread.

    • Sundray@lemmus.orgOP
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      2 days ago

      They don’t seem to have a working theory yet, they just noticed the historical temps are higher than expected. Exited to see what more research reveals!

    • gandalf_der_12te@discuss.tchncs.de
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      2 days ago

      i assume nuclear decay processes in its interior

      i.e. uranium decays into lead and that process releases some heat continuously for a very long time

      it also happens on earth, though i don’t have any exact number for it. AFAIK, it’s what keeps the earth’s interior warm. otherwise it would have cooled down a lot more since the earth formed a few billion years ago.

      • jaybone@lemmy.zip
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        2 days ago

        That all makes sense.

        But if the inner planets do this too, then why is it such a mystery? Sounds like every planet does this then.

    • thebestaquaman@lemmy.world
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      3 days ago

      I’m not at all sure about this, but isn’t there decent reason to believe that the gas giants have solid cores? I mean, earth generates plenty of heat in its core (largely from nuclear decay I believe), I don’t see why the same thing couldn’t be going on in Uranus?

      • ryannathans@aussie.zone
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        2 days ago

        My thoughts well summarised haha they are gas planets with significant mass. In astrophysics class I am sure they said gases heat up under gravity and stable fusion is obtained if enough heat/gravity/mass. They should still heat in the absence of fusion. I haven’t read the research but I assume that’s accounted for. So is the remaining heat chemical or nuclear? Maybe they have some heavy radioactive elements pumping out heat too? Or stored primordial heat being slowly released?

        • gandalf_der_12te@discuss.tchncs.de
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          2 days ago

          it’s not chemical, that much i can tell you. there was a study done in 1800 iirc where they contemplated what gives the sun its enormous power and they figured out that if the sun was a solid ball of coal burning slowly, it wouldn’t last longer than 200 years iirc, at the enormous rate of power it emits. it’s a nuclear process

          these nuclear processes can be very long-running. uranium takes billions of years to decay. it’s probable that a lot of planets have uranium in their interior and that heats up the planet from the inside.

    • Sundray@lemmus.orgOP
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      2 days ago

      I’ve had good luck with fiber + probiotic = happy bottom. (But check with your doctor.)

  • Destide@feddit.uk
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    3 days ago

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