or just a ‘poof’?

  • RegalPotoo@lemmy.world
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    4 months ago

    For a start, the planet wouldn’t actually collide with the sun on one piece - once the planet crosses the Roche limit it will break apart

    • deegeese
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      4 months ago

      Sorry, but that’s wrong.

      Roche limit applies in a circular orbit, tidal effects are irrelevant in a head on collision.

        • deegeese
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          4 months ago

          Eccentric orbit is still an orbit with tidal forces.

          A dead in crash will stretch the sphere, but without angular momentum, it’s just a raindrop.

    • A_A@lemmy.world
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      4 months ago

      if it “ran straight”, it wouldn’t have tangential speed, only radial.

      • RegalPotoo@lemmy.world
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        4 months ago

        Yeah, but single large mass hitting in one place vs stuff spread out vs planet forming a ring and deorbiting over months/years would affect the outcome

        Practically, I’d think there wouldn’t be a huge effect beyond some CMEs - the mass of the earth is a rounding error compared to the sun - but I’m not a cosmologist