Sorry to pile on, and I don't think you deserved the downvotes, but I'd like to ... | Hacker News

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		emiliobumachar on Jan 2, 2020 \| parent \| context \| favorite \| on: Alone in a Crowded Milky Way Sorry to pile on, and I don't think you deserved the downvotes, but I'd like to point out there may be an undiscovered planet in the solar system. https://en.m.wikipedia.org/wiki/Planet_Nine

hnuser123456 on Jan 2, 2020 [–]

There may also/instead be an undiscovered primordial black hole in the solar system.

https://www.sciencemag.org/news/2019/09/planet-nine-may-actu...

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