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[-] danc4498@lemmy.world 26 points 4 months ago

Back in my day the only planets we knew of were the ones in our solar system.

[-] JasonDJ@lemmy.zip 20 points 4 months ago

And there were nine of them!

[-] SonarTaxLaw@lemmy.world 1 points 4 months 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 13 points 4 months ago

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

[-] Dohnuthut@lemmy.world 6 points 4 months ago

Did you hear about Pluto? That's messed up, right?

[-] Hadriscus@lemm.ee 5 points 4 months ago

the human named Jerry has something to announce...!

[-] smeenz@lemmy.nz 3 points 4 months 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.

[-] AhismaMiasma@lemm.ee 2 points 4 months ago

Thumbs nose

You know that's right.

this post was submitted on 28 Jun 2024
1707 points (98.2% liked)

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