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[-] nialv7@lemmy.world 149 points 1 month ago
[-] Zerush@lemmy.ml 102 points 1 month ago

Correct, it's called planet when it orbits arround the Sun AND has cleaned it's orbit from asteroids, not the case of Pluto, whose orbit is still full of other objects, some even bigger than Pluto itself.

If it orbits an Planet instead of the Sun, it's a Moon, even if it is bigger than some other planets.

[-] Klear@quokk.au 25 points 1 month ago* (last edited 1 month ago)

"All right, Ganymede. You can be a planet, but first you have to clean up your orbit. Start with Jupiter."

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[-] nexguy@lemmy.world 19 points 1 month ago* (last edited 1 month ago)

Jupiter has a permanent cloud of asteroids that follow it and neptune crosses the orbit of pluto so neither of those have cleared their orbits so of course they made exceptions so that their contrived definition fits.

[-] yetAnotherUser@discuss.tchncs.de 41 points 1 month ago* (last edited 1 month ago)

Do you mean the asteroids at the Lagrangian points? Every single planet has asteroids there because math/physics dictates those points to be stable. Jupiter has the most at its points because it's the largest planet.

Same with Neptune cleaning its orbit: It has collided with every single thing in its orbit EXCEPT those that synced their orbits to Neptune. An object that is gravitationally dominated by a single planet should not be a planet under any definition.

Sources because I had to read into your claims and I'm no astrophysicist:

https://en.wikipedia.org/wiki/Lagrange_point

https://en.wikipedia.org/wiki/Resonant_trans-Neptunian_object

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[-] Yondoza@sh.itjust.works 22 points 1 month ago* (last edited 1 month ago)

Jupiter's Trojan asteroids sit at Lagrange points. Material found there is not counted in the 'clearing the orbit' criteria. They are in stable orbits caused by the mass of the planet in question, not in lieu of a massive enough body.

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[-] FuglyDuck@lemmy.world 12 points 1 month ago

Pluto is a dwarf planet, which is still a planet.

Also, they absolutely should have just made an exception for Pluto so science teachers everywhere could have used that as a fun teaching point.

[-] Small_Quasar@lemmy.world 40 points 1 month ago

Considering it's in a double tidally locked orbit with its own moon Charon and the point that both rotate around is outside Pluto's volume I would argue that the Pluto/Charon system is actually a dwarf-binary-planet.

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[-] GraniteM@lemmy.world 15 points 1 month ago* (last edited 1 month ago)

Also they shouldn't have called the category of "things that aren't planets despite being in some ways planet-like" "dwarf planet," they should have called them "planetoids." Star Trek had been referring to small planet-like objects as planetoids for decades, so the work in the popular consciousness had already been done. Dwarf planet not being a planet makes it sound like they're saying dwarf people don't count as people, and I don't care for that at all.

[-] atomicbocks@sh.itjust.works 13 points 1 month ago

Precedent for an exception would go to Ceres not Pluto.

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[-] HeyThisIsntTheYMCA@lemmy.world 9 points 1 month ago

when it orbits arround the Sun AND has cleaned it’s orbit from asteroid

Jupiter, largest of all dwarf planets, shares its orbit with some i don't know million asteroids.

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[-] wizzor@sopuli.xyz 28 points 1 month ago
[-] tdawg@lemmy.world 27 points 1 month ago

Wasn't it more bc it doesn't clear it's surroundings?

[-] accideath@feddit.org 13 points 1 month ago* (last edited 1 month ago)

And it has an orbit at a different angle than the 8 Planets and at it’s narrowest the ellipse of Plutos orbit is actually closer to the Sun than ~~Uranus~~ Neptune.

Edit: That moment when you‘re so done, you fuck up the order of our planets…

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[-] itsmistermoon@piefed.social 9 points 1 month ago

That's what I tell my wife but she won't listen

Come on guys, laugh

[-] prettybunnys@piefed.social 12 points 1 month ago

We’re laughing with your wife.

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[-] skisnow@lemmy.ca 100 points 1 month ago

Weird how many people seem to think it’s like a competition or something. It’s a descriptive label.

The whole Pluto thing taught us a lot about the psychology of letting go of something taught at a young age. People getting proper frothing at how they shoulda just let Pluto keep it, just to save themselves the extremely minor cognitive dissonance.

[-] piccolo@sh.itjust.works 48 points 1 month ago* (last edited 1 month ago)

When people get upset about pluto, I'll just tell them if pluto is planet, so is Ceres. Which then results in mindless staring because they never even heard about Ceres...

[-] mnemonicmonkeys@sh.itjust.works 10 points 1 month ago

And Cedna. And Eris. And Makemake. And Haumea. And...

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[-] Kushan@lemmy.world 20 points 1 month ago

Have you seen the lengths people go to in order to not have to change their world view even a smidge? To not have to correct themselves about anything at all? I'll give you a hint, literally every right wing party in the world doing well is because weak people can't change a damn thing about themselves.

[-] toynbee@lemmy.world 9 points 1 month ago

"World view" is very fitting here.

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[-] Zamboni_Driver@lemmy.ca 19 points 1 month ago

I really doubt more than .001% actually care if it's called a planet or not, it's just a meme to pretend that you care. Like pineapple on pizza.

No one actually cares if you put pineapple on pizza. No one actually cares about Pluto being a planet. But there are many people who see themselves as some sort of white knight defenders of the truth against haters that don't actually even exist.

[-] HeyThisIsntTheYMCA@lemmy.world 9 points 1 month ago

I care if you put pineapple on pizza. Please put it on yours. Please. That means less on mine. Not that i dislike it, i just lack the parts to digest it properly.

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[-] JackbyDev@programming.dev 43 points 1 month ago* (last edited 1 month ago)

People fighting for Pluto that it should be a planet instead of a dwarf planet

Ceres: 🥺

Context: Ceres is now considered a dwarf planet, and used to be considered just an asteroid, but when it was first discovered it was considered a planet. That was in 1801. There is no objective criteria for what a planet is and isn't. Like a lot of things in nature, things just exist, and as humans we categorize them. Ceres is round like a planet like Pluto. I'm not saying it should be considered a planet, I think dwarf planet fits them both nicely. As late as the 1950s Ceres was still sometimes considered a planet by some people.

I have a sort spot for it. I love it.


Edit: Because two people have misunderstood me now I'm going to say it more explicitly. I'm fully aware there is a scientific definition for dwarf planets. I'm not saying there isn't. I'm just saying compared to something else like prime numbers there isn't an obviously correct way to categorize them and the definition has changed over time. By stating the current definition of planets and/or dwarf planets you're missing my point. Those definitions change. See here for the history.

[-] HeyThisIsntTheYMCA@lemmy.world 21 points 1 month ago

I'm fighting for jupiter to also be a dwarf planet because it has not cleared its orbit of a few million asteroids.

[-] Gormadt 11 points 1 month ago

You do have a point

[-] rbos@lemmy.ca 10 points 1 month ago

All those asteroids are cqptured in Jupiter's Trojan points, no?

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[-] halvar@lemy.lol 42 points 1 month ago

well guess which Moon is also pretty close in size to Mercury

[-] humorlessrepost@lemmy.world 11 points 1 month ago

What is yer mum’s bare arse, Trebek!

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[-] Rcklsabndn@sh.itjust.works 37 points 1 month ago

Gas giants aren't planets: they're just clouds, man.

[-] benny@reddthat.com 12 points 1 month ago

Space clouds.

[-] azertyfun@sh.itjust.works 11 points 1 month ago

The sun is just a particularly angry cloud.

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[-] ianhclark510 36 points 1 month ago

Git Gud Ganymede, break out of Jupiter’s orbit

[-] Wilco@lemmy.zip 30 points 1 month ago

Well ... what planet does Mercury orbit? Oh ... yea, then its not a moon.

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[-] Matombo@feddit.org 23 points 1 month ago
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[-] DagwoodIII@piefed.social 23 points 1 month ago

New York City born and raised.

I distinctly remember a third grade class when the teacher told us that the population nation of Sweden was smaller than the population of New York City.

Nobody does indignation like a 9 year old.

[-] deranger@sh.itjust.works 13 points 1 month ago

If you’re only counting New York City proper this is true, but the New York City metro area vastly out populates the entire nation of Sweden. (20M vs 10M)

[-] DagwoodIII@piefed.social 12 points 1 month ago

iirc it was NYC 8 mllion and Sweden 7.5 million. No idea what her source was.

[-] AngryCommieKender@lemmy.world 18 points 1 month ago

Mercury used to be bigger than it currently is. The only thing that's survived the wrath of The Sun is its core.

[-] Klear@quokk.au 11 points 1 month ago

Mercury is hard core.

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[-] Blackmist@feddit.uk 10 points 1 month ago

Don't take Mercury for granted.

This is how we lost Pluto to the "well ackchually" gang.

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this post was submitted on 07 Jan 2026
939 points (100.0% liked)

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