What does Eris the dwarf planet look like?
the planet Eris looks like Pluto, an icy rock and dust.
Plato is not a planet but a philosopher. If you mean Pluto: it is no longer considered a planet, but a "dwarf planet"; something like a large planetoid. A planetoid larger than Pluto has already been discovered - look up information about Eris. It seems reasonable to expect that more such "dwarf planets" will be found in the future.
Pluto is not like a gas giant it is small in size so it is like aterrestrial planet, rather like mercury but Pluto is far away and thus much cooler. Please look up why the dwarf planets have been categorized and it will show you Pluto's failings in comparison to the other planets Pluto fails to meet the criteria set by the new board of planet selectors (IAU) and is thus now categorized as a…
The planet "Pluto" was recently reclassified as a dwarf planet because astronomers believed that it was too small to be classified as a "regulation" planet. The original images of Pluto made it look like a full size planet, but later observations revealed that it was about a tenth of the size that we first thought and that it had an orbit that can only be described as "wacky".
That would depend on what you consider a "planet". Currently, the International Astronomical Union has classified eight bodies in our solar system as planets and five more as "dwarf planets" including Pluto and the asteroid Ceres. There's 13 right there. There are almost certainly other "Trans-Neptunian Objects" such as Pluto and Eris that are farther out from the Sun and probably Pluto-sized or larger. We'll find them when we go out and look for them.
Astronomers had been looking for a "tenth planet" beyond Pluto, and they found one. But it wasn't as big as expected, and the discovery of this "tenth planet" led astronomers to look for other similar objects even further away. With the rapid and ongoing development of more and more powerful telescopes, it became clear that there could be a very large number of moderately-sized but VERY distant objects in the Solar System. In 2006, the…