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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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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I think 10^42 joules is going to wreck the entire solar system and probably the Orb cloud and maybe even a few nearby solar systems. That's massive.