• Björn@swg-empire.de
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    53 minutes ago

    I remember looking at an astronomy book at school and seeing Pluto’s weird ass slanted orbit and thinking that it shouldn’t be counted amongst the others. Felt really vindicated when Jim Carrey’s kids in Me, Myself and Irene argued about Pluto not being a planet. The official definition was just cleanup.

  • palordrolap@fedia.io
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    7 hours ago

    Pluto is a dwarf planet. “Planet” is right there in the name, so yes, it’s literally a planet.

    Ceres is also a planet. You’ll be including that one too, right?

  • nexguy@lemmy.world
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    7 hours ago

    I imagine nasa would be perfectly fine with Pluto still categorized as a planet. It was just a handful of people at a IAU conference(many had left by the time the vote happened) that made the change.

    • Rhaedas@fedia.io
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      7 hours ago

      Historically it’s fine. Technically it’s not. The thing is, it’s still a type of planet, it’s not like it’s now called something completely different. It’s more specific to fall in line with the likely many, many neighbors that are out there.

      • nexguy@lemmy.world
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        5 hours ago

        I would completely agree with you except IAU specifically said Pluto is a dwarf planet and that, for some reason, a “dwarf planet” is NOT a sub category of planet. It’s its own thing and not a planet.

        It was a weird conference and a weird vote.

        Edit: “planet” IMHO is more of a traditional category like constellation. Some how a tiny rock like mercury is more like Jupiter than the tiny rock Pluto. It doesn’t make much scientific senseso it seems more traditional. It would be like removing the name for a constellation because one of the stars is really a bright nebula or something.

        • Klear@piefed.world
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          5 hours ago

          It was a weird conference and a weird vote.

          Nah, the other option was to add a bunch of planets, including Ceres right between Mars and Jupiter. If you wanted to keep things as close to what they were before, removing Pluto was the more conservative option.

          • nexguy@lemmy.world
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            4 hours ago

            There could be many options. My favorite is a reclassification. Terrestrial planets(first 4), gas planets (next 4) and drwarf planets (numerous). Though mercury could fit into the dwarf planet category which is fine with me. The current classification was made specifically to demote pluto with rules that particularly apply to it so that mercury would not fit into it. It was to keep the “planet” category special and to not have too many(keep it traditional). Seems a bit geocentric and less scientific.

            • girsaysdoom@sh.itjust.works
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              2 hours ago

              I totally agree. It felt like it was an arbitrary ruling to keep the number of memorable celestial bodies low.

              I actually like the idea of PMOs being defined as planets but it also sounds like there’s too much disagreement for any resolutions on this topic.

        • agamemnonymous@sh.itjust.works
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          5 hours ago

          The problem is that since Pluto was discovered, we’ve found many similar bodies. Astronomers suggest there could be hundreds.

          If you define “planet” so that it excludes Pluto, 8 objects in our solar system qualify as planets. Any definition that includes Pluto qualifies at least 13 planets with a high likelihood that that number will increase every few years.