There was no 'demotion' to dwarf planet status - it was a promotion from non-planet-that-we-pretend-is-a-planet-in-school-textbooks to a new category that formally made it sort of a planet, but not quite.
In the matter of pluto I once listened to a podcast that explained everything that happened in the convention and how it was divided between the people that wanted pluto to stay a planet, in their majority american, and the ones that though it should have another status, I think they first called a commitee that said that all round objects that exceded some meditions would become planets and that was full of contradictions, and it would evolve to 12 planets and probably in the future to more, then they decided to overthrow that decision and came with a new definition, the new definition is still very ambiguos but It defined what we know today as the planets. I maybe got something wrong but I tried my best to remember.
Oh yeah, they made the right decision. If Pluto is a planet, then Eris has to be as well. And there are probably a bunch more Kuiper Belt objects that would meet the criteria as well.
But to say that it was "never" a planet? That's just silly. You can't rewrite history.
https://en.wikipedia.org/wiki/Pluto
"Pluto was discovered in 1930 by Clyde W. Tombaugh, making it the first known object in the Kuiper belt. It was immediately hailed as the ninth planet."
In any case Pluto isn't the first planet to be demoted. The first four asteroids to be discovered (Ceres, Pallas, Juno and Vesta) were all considered planets in the 19th century.
Blu-Ray is not a DVD format. It’s a very different type of disc entirely. A better phrasing would be "home video format", which would also eliminate the clunky duplication of the term DVD.
Lovely year!
But to say that it was "never" a planet? That's just silly. You can't rewrite history.
https://en.wikipedia.org/wiki/Pluto
"Pluto was discovered in 1930 by Clyde W. Tombaugh, making it the first known object in the Kuiper belt. It was immediately hailed as the ninth planet."
In any case Pluto isn't the first planet to be demoted. The first four asteroids to be discovered (Ceres, Pallas, Juno and Vesta) were all considered planets in the 19th century.