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A comment on What if Planet 9 is a Primordial Black Hole? (2019). Parent comment

Re:What if Planet 9 is a Primordial Black Hole? (2019) by tinco on Friday August 13, 2021 @07:21PM (#28176064)
Very cool, thanks! It's closer than I thought, yet just too far to see it unless it's causing things to happen around it. I suppose if it would crash (slowly :p) into the earth and you were at 67 kilometers you'd see some crazy things.
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Re:What if Planet 9 is a Primordial Black Hole? (2019) by TeMPOraL on Friday August 13, 2021 @07:42PM (#28176227)
Worth remember for comparison that the Kármán line is at 100 kilometers. ISS orbits at ~400 kilometers. So, if such a hole were to appear on the surface of the planet, even the crew of the ISS would have a very bad day.
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Re:What if Planet 9 is a Primordial Black Hole? (2019) by vladTheInhaler on Saturday August 14, 2021 @03:09AM (#28178709)
Well the ISS orbits at R_earth + 400 km. So it wouldn't be nearly as bad as that number makes it sound.
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