Hi 🙂 Good question. Pluto is now known as a ‘dwarf planet’ … Dwarf planets are different from asteroids because they’re a lot bigger than other asteroids closer to the sun. However, there are other dwarf planets, further out than Pluto … it took us longer to find them because they’re further out so we needed to build bigger telescopes to see them.
Not my field either, but not to say I’m not interested. I think a scientific mind is always interested in details and different phenomena – we always want to know how, why, and how not, and why not. We may not always understand fully, but keep on asking ….. 🙂