hoi
poor little Pluto
Scientists that study the solar system.
No, they are not. Pluto doesn't meet all of the requirements to be considered a planet.
No planet has "disappeared" (at least not from our solar system). You are probably referring to Pluto. Pluto used to be considered a planet, but scientists have discussed this topic and now it is just considered an asteroid.
Pluto. It is considered a dwarf planet but very small compared to others in our solar system
lol i dno .. i need help on dah
pluto is no longer a planet because some scientists believed that pluto no longer reched the requirments to be a planet, meaning pluto is to small to be a planet and is now considered a dwarf planet.
Not since 1846, no. Everything discovered in the solar system since then is considered to be at best a dwarf planet.
Its been proven. Wow. Who asks that question? Just kidding. The scientists have proven it!
Technically speaking... Neptune. It was pluto, but scientists considered it no longer a planet.
The IAU arrived at a new definition for "planet" which left Pluto out in the cold. It is now designated as a "Dwarf Planet". also it was called a planet when is was larger but now it has become smaller scientists no longer class it as a planet
To answer this question, technically, there is no planet 9th from the sun, because Pluto is no longer considered a planet.