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A comment on The Orbit of Planet Nine. Parent comment

Re:The Orbit of Planet Nine by solidangle on Sunday August 29, 2021 @05:07PM (#28350482)
It could be, but it would be the size of a tennis ball. See https://news.ycombinator.com/item?id=28167058
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Re:The Orbit of Planet Nine by pitaj on Sunday August 29, 2021 @07:33PM (#28351471)
According to my calculations it would take more than 10^53 years to decay.
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Re:The Orbit of Planet Nine by scatters on Monday August 30, 2021 @12:26AM (#28352811)
It won't even start to decay until space expands enough that it's warmer than the cosmological background, not that that's more than a rounding error to your calculation.
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