This hypothesized ninth planet (not you, sorry Pluto) might explain the unusual commonalities of extreme trans-Neptunian objects (ETNOs) 100s of AU from the sun. These ETNOs (such as dwarf planets and sednoids) have remarkably aligned orbits, suggest the existence of an undiscovered celestial body, dubbed Planet Nine, influencing them gravitationally.
Back in my day is was called Planet X. Sad
Musk ruined the mystique of that letter
I know right. Why do they always have to rename stuff. Isn’t there enough new stuff to name?
I thought Planet X was a hypothetical inner planet?
Nah, it’s the same thing. Just renamed to planet nine now.
Well without Pluto it would be planet 9 not 10
X is so much more than just the Roman numeral.
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Not a stupid question.
Beyond the too far to reflect light aspect, the evidence we do have is gravitational effects to other bodies we can see and track. So there is evidence that something is out there. It’s just a matter of what and exactly where.
The problem is the potential planet is so far that it would barely reflect any light. We have inferred from computer models that for known planet and object orbits in our neck of the woods, there needs to be a planet there to create those orbits.
We just can’t see it because it’s so far out there, it’s really really dark, and it doesn’t pass in front of a star to see the dimming effect that would let us know it’s there. If we knew where to exactly point telescopes, it’s possible with enough study we could say it’s really there.
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Also confer this very topical article
Paywall
Pluto will always be the ninth planet in my book.
It can’t be the ninth planet. It literally can’t. It’s either not a planet, or its the tenth planet.
Everyone forgetting about my boy, Ceres.
Exactly! Fair enough if you want to define a planet as “anything big enough to be rounded by self-gravity, but too small to undergo fusion in its core.” But there is no definition of a planet, (or at least one without an arbitrary rule like "planets have to be X km in diameter,) that allows Pluto to be a planet without Ceres also being a planet.
Pluto for life.
Yeah, I have a lot of outdated books too.
Edit: I guess people don’t enjoy book puns?
Even if it’s a dwarf planet, it’s still a planet. It’s right there in the name: dwarf planet.
This article should be about “Planet 18” since Wikipedia recognizes 17 planets already.
It’s closer to planet 1.4 million if you include the rest of the dwarf parts and minor planets under the same logic. It gets a little hard to remember all the names at that point though.
Challenge accepted!
Do you put butterflies on your toast?
Free protein!
Okay Jerry
Pluto is hypothetically a planet.
Oh yeah, well you’re hypothetically correct.
I prefer to think of Pluto as the king of the dwarf planets and namesake of the Plutoids, rather than as a weird lesser planet not appreciably bigger than its moon.
I see Pluto and Charon as Irish twins. Or at least 2 under 2. I somehow always imagine two siblings spinning around each other. Maybe Pluto is showing a 🫶 to his little sister.
Get the space platforms ready lads were going to the shattered planet.
Get your biter eggs on board. We gonna make promethium science.
There’s the even more hypothetical and highly theoretical Planet Eleven. It’s so obscure there aren’t even rumors about it.
Probably one of the greatest cinematic masterpieces.
You’ve never seen Kraven the Hunter and it shows.
Sorry I’m not into art house
You hear what they did to Pluto? That’s messed up
Come on son!
pineapple
My go-to conversation started with the ladies
If you wanna get really tin-foiled about it, Planet X and a dead star beyond the belt
Nibiru who come around every few thousand years so the ( i think reptilian ) that live on it can harvest our gold ans human for slavery
It’s a nice rabbit hole to follow
I cant believe they are turning Neptunian objects extremely trans
That’s why the government is trying to cencor Planet Nine’s Existence!
FREE #PLANET_NINE
