yes is was not included as it is not a major planet it is a dwarf planet! Nice to help!!!
Because for years it was thought that there were 9 planets, which included Pluto. But, in recent years it has been discovered that there are other, smaller, dwalf or minor planets which lay beyond the orbit of Pluto. Some of these dwalf planets are as big or even possibly bigger than Pluto. So, a decision had to be reached to either downgrade Pluto to the status of a dwalf or minor planet or include all of these other objects (and nobody knows precisely how many there are) into the main system of planets. If they were all included allthe minor planets into the major system of planets they would all need to be named, so the decision was taken to downgrade Pluto to simplify matters. So now there are only 8 major planets and many more, mostly un-named and undiscovered minor or dwalf planets.
Scientists do not consider Pluto a major planet due to its size, orbit, and characteristics that differ from the other eight recognized planets in the solar system. Additionally, there are other dwarf planets, such as Eris, Haumea, Makemake, and Ceres, that are not classified as major planets.
It is not the dominant object in the neighbourhood of its orbit.
Eight if you don't count Pluto. That is - 8 major planets. But there are several minor planets though; Pluto (obviously) Ceres (in the asteroid belt) Charon (Pluto's twin planet) and several others that are farther out than Pluto. look them up online - Trans-plutonion planets or planetoids.
They are sometimes called "major planets" to distinguish them from the "minor planets" (the asteroids) and "dwarf planets" like Pluto.
Pluto is smaller than the eight major planets. It is the second-largest "dwarf planet" in the solar system (only Eris appears to be larger).
No, this is not true.The dwarf planet Pluto is smaller than all of the major planets in our solar system, including Mercury.
No scientists say that. Scientists know that Pluto is a dwarf planet, and not one of the 8 major planets of our solar system.
Since Pluto was down graded to a Dwarf planet in 2006, our solar system only has 8 major planets orbiting the Sun. However there are a few more Dwarf planets outside the orbit of Pluto that are being considered for Dwarf Planet status.
Pluto is farther from the sun than any of the 8 major planets. There are other dwarf planets farther from the sun than Pluto though.
From its discovery in 1930 until its degradation in 2006 Pluto was considered the solar system's ninth planet. Now it is considered a dwarf planet, and one of 5 official dwarf planets.
No, because Pluto is not considered a planet by the scientific community.