or just a ‘poof’?

  • Oooo, good question. What if it were traveling, relatively, at a fair percentage of C? Say 80 or 90%? What if it went not straight through the center, but say 30% off of center? Would any mass make a complete pass through, at that velocity? It’d be about 23% more dense from relativity, but countless YouTube videos about gun ammunition has taught me that velocity is the biggest factor in armor penetration. Would it blow a huge plume of plasma out there other side?

    Dude, you just made this no doubt question far, far more interesting!

    • NeoNachtwaechter@lemmy.world
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      3 months ago

      Oooo, good question. What if it were traveling, relatively, at a fair percentage of C? Say 80 or 90%?

      How many objects (not counting the “Heart of Gold”) do you know that are traveling at such speeds?

    • cevn@lemmy.world
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      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
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        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
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        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
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          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
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            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.