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.
Get the space platforms ready lads were going to the shattered planet.
Get your biter eggs on board. We gonna make promethium science.
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
Back in my day is was called Planet X. Sad
Well without Pluto it would be planet 9 not 10
X is so much more than just the Roman numeral.
Musk ruined the mystique of that letter
I thought Planet X was a hypothetical inner planet?
Nah, it’s the same thing. Just renamed to planet nine now.
Pluto will always be the ninth planet in my book.
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.
Do you put butterflies on your toast?
Free protein!
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.
Potentially stupid question: Granted that we have such good vision for planets an incomprehensible distance away from us, why wouldn’t we be able to detect, with certainty, if this planet is actually present in our system? I’m guessing it would take longer to orbit around the sun, than Pluto’s 247 years, but it’d still be detectable because of the distance away from us
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.
