Planet Nine Hypothesis

Discussions revolve around the hypothetical Planet Nine in our solar system, including its potential orbital interactions with Jupiter and other planets, moons, and debates on planet definitions like orbit clearing and comparisons to Pluto.

➡️ Stable 0.5x Science
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#7542
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Keywords

HN PLANET NEO en.m imgur.com www.nasa TIL MAY OTHER wikipedia.org planets planet orbit solar dwarf star size close zone orbits

Sample Comments

TravHatesMe • Oct 29, 2024 • View on HN

Wouldn't Jupiter's orbit create some interactions?

lomnakkus • Jul 19, 2017 • View on HN

Ah, missed the "in our solar system" bit :).

est • Nov 29, 2008 • View on HN

what about other planets & satellites in our solar system??

bmitc • Mar 16, 2023 • View on HN

I said other planets' moons. :)

toyg • Dec 18, 2018 • View on HN

Genuine question from an astronomically-challenged person: why would this not be a planet?

crimsonalucard • Apr 8, 2015 • View on HN

every planet, OTHER then this one.

verdverm • Aug 18, 2022 • View on HN

only if you limit yourself to a single planet?

Gravityloss • Mar 17, 2021 • View on HN

"it is likely a piece of a Pluto-like planet from another solar system"

Herring • Jan 10, 2010 • View on HN

I'm sorry, two planets in our solar system?

ExtraE • Sep 5, 2021 • View on HN

I assume they meant a portfolio of planets?