Astronomers now doubt there is an undiscovered 9th planet in our solar system | Hacker News

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		Astronomers now doubt there is an undiscovered 9th planet in our solar system (phys.org)
		6 points by spchampion2 on May 27, 2020 \| hide \| past \| favorite \| 1 comment

Cactus2018 on May 27, 2020 [–]

On the other hand, 'If Planet Nine Is a Tiny Black Hole, This Is How to Find It' https://news.ycombinator.com/item?id=23132488

> The black hole in this scenario is neither infinitely massive nor infinitely small... 10 times more massive than Earth and five cm across.

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