• SonarTaxLaw@lemmy.world
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    3 days ago

    That’s still very much the case. All planets are, by definition, in our solar system. Any planet-like bodies not in our solar system are called exo-planets.

    • oce 🐆@jlai.lu
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      3 days ago

      You make it sound like exoplanets are not planets, but they are, unless you have a recent source that contradicts my education.

      • smeenz@lemmy.nz
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        2 days ago

        Not really, no… it’s a comet or at best a rogue kuiper belt object. It’s smaller than earth’s moon, its orbit is wildly elliptical, and it hasnt cleared out its orbital path. Many reasons not to consider it a planet, and so it was dropped.

        If Pluto was to be called a planet, then Ceres would also need to be called one, and everyone seems happy with calling that an asteroid.