> because people felt that they would have to add more planets and they didn’t want to do that
The first exoplanet was detected in 1995, so it seems very unlikely this was the case. We have thousands of detected planets now and are beginning to understand them more than ever.
It is a common categorization problem with any natural phenomena.
Correct, it's called sorites paradox. At the same time when you figure out that Pluto isn't one large object with smaller moons around it, but instead a few larger objects orbiting an external barycenter it stops making sense to treat it like the other planets.
The first exoplanet was detected in 1995, so it seems very unlikely this was the case. We have thousands of detected planets now and are beginning to understand them more than ever.
It is a common categorization problem with any natural phenomena.
Correct, it's called sorites paradox. At the same time when you figure out that Pluto isn't one large object with smaller moons around it, but instead a few larger objects orbiting an external barycenter it stops making sense to treat it like the other planets.