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Back in my day the only planets we knew of were the ones in our solar system.
And there were nine of them!
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.
You make it sound like exoplanets are not planets, but they are, unless you have a recent source that contradicts my education.
Sure, how about this https://www.dictionary.com/e/exoplanets-and-planets-the-truth-is-out-there/
Did you hear about Pluto? That's messed up, right?
the human named Jerry has something to announce...!
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.
Thumbs nose
You know that's right.