Pluto - it is now categorised as a dwarf planet
The dwarf planet Pluto lost its classification as a planet in 2006.
In our solar system; Pluto. It is now accepted as a "dwarf-planet".
Pluto lost it's "planet" status and now is called a dwarf planet.
Pluto
Pluto recently lost its status as a planet and is now a dwarf planet.
I think you mean Pluto, and the answer is no, Pluto is not a planet. It used to be but it was discounted as there are other similar-sized objects in space which have not been classified as planets because they are too small. Therefore, Pluto was degraded to a dwarf planet.
Pluto
Pluto was ranked down to a dwarf planet in 2006
Many. In the early solar system, there were many more planets than there are now. Most hit joined into larger planets and a few were captured and became moons.
The planets formed in the solar system about 5 billion years ago, they weren't "added to it" later. The discovery of the planets is lost in the mists of prehistory, except for Uranus (1781) and Neptune (1846).
The Magic School Bus Lost in the Solar System happened in 1994.
The Magic School Bus Lost in the Solar System has 40 pages.