or just a ‘poof’?

  • cevn@lemmy.world
    link
    fedilink
    arrow-up
    0
    ·
    3 months ago

    Fascinating. Lets say at 90% the planet spends 1 second inside the sun. Doesn’t seem like enough to melt the whole thing so it just keeps going, just a lot smaller. The core of the sun tried its best to push it back but gets pierced and the fusion reaction stops. Star killer??

    • peopleproblems@lemmy.world
      link
      fedilink
      arrow-up
      0
      ·
      3 months ago

      Another comparison here. If a human was just made of ballistics gel, weight for weight, meaning no vital organs or anything, a 10g round would hit a target it 1/9000 the side of.

      Earth, hitting the sun would be like something 1/800000 this size of.

      Oh shit my lunesta kicked in. Someone better double check my numbers

    • peopleproblems@lemmy.world
      link
      fedilink
      arrow-up
      0
      ·
      3 months ago

      No. You are also forgetting the density of the sun increases with depth. For instance, if it’s heading for the core - the solar core is about 155g/cm^3. Where as earth is 5.5g/cm3.

      Essentially, going 0.9C is going to impact the sun, and we can say the incoming earth object is going to classically hit with 4.9*10^24 J.

      At this size and and energy, we compare it to the rest energy of the entire sun (this isn’t how we would actually do it) but the sun has a total resting mass energy equivalence of like 1.8x10^41 J.

      The energy of the earth like object impacting the sun is 0.000000000000000027%.

      The sun effectively doesn’t even know it happened.

      • cevn@lemmy.world
        link
        fedilink
        arrow-up
        0
        ·
        3 months ago

        I knew my crap science would get the real scientists in the comments, good point about the density. It would just sort of harmlessly splat.

        • peopleproblems@lemmy.world
          link
          fedilink
          arrow-up
          0
          ·
          3 months ago

          Now hold on, I did my math wrong. It was far too late at night. I used C=300000 not 3*10^8.

          That gives us an impact energy, classically, of 5.37*10^41 J.

          So that is about 3 times the kinetic energy than the engery at rest of Sol.

          Sol is not at rest, further, we have non- insignificant factors at play here.

          Sol is orbiting Sagittarius A* at 250km/s. Additionally, we have the general relativistic relationship between Sol and our massive projectile.

          I’m going to work on modeling this, it got far more interesting.