Physics Twitter -- if two basketball sized black holes collided with each other around the orbit of Jupiter, what effects would we feel here on Earth? Would it be bad?
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Other than the champagne corks popping at LIGO and VIRGO?
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idk about this — if the Sch radius is 70ish cm, that is more like 85 earth masses per basketball [r = (2GM/c²)]
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Per this video a minimum sized black hole is the size of a small town. youtube.com/watch?v=5uHwyz - I cant' find the video, but hypothetical small black holes radiate energy so fast they disappear. Big black holes radiate energy really slow.
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If the black holes were big enough to be black holes ( few x solar mass), then that would be like a star or other large object wandering into the solar system. That could capture earth or eject earth from orbit around the sun. Likewise, I can't quickly find the video on that.
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Not physics Twitter, but AFAIK black holes collision only generate gravity waves, just before the collision.
No explosion, nothing fancy. Makes sense, nothing gets out of a black hole.
Now, would these waves have any impact on us, apart from exciting LIGO ?
Dunno...
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But I guess the impact of said waves is proportional to the mass of said holes.
Yours seems quite light?
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My understanding is they'd evaporate near instantaneously (they're below some threshold size for stability), but the mass of each would be around 85 earth masses. Not enough to change earth orbit, but enough that we'd notice it. (Jupiter's mass, for ref, is around 300 earths)
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Doing some formula'ing. Looks like about 10^42J released if they collide, which is... a lot of joules. (Tsar Bomba was 10^17, if wikipedia serves)
I have absolutely no idea what that does to Earth, but it is almost certainly a bigger deal than the gravity, mea culpa!
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