why planet Pluto became a star & not consider as a planet anymore?

Answer 1

Pluto is now a dwarf planet, not a star. The reason it was demoted is because it is not on the same orbital plane as the rest of the planets, and it does not have enough gravitational force to clear its orbital path. There are several other objects beyond the eight planets that are similar to Pluto in size and orbit, and it was either add them or demote Pluto and stick with eight. Also, Pluto is a double system, with its "moon" Charon, and the revolve around each other while they're revolving around the Sun.

Answer 2

Its been covered here, but Pluto is not a star. The IAU states the definition of a planet below.

http://en.wikipedia.org/wiki/2006_definition_of_planet

Basically if pluto was still considered a planet, then at least 4-5 other "objects" would have to be planets too, some go as high as saying 15 other objects would have to be included.

Answer 3

First off, Pluto did not become a star! A star has to be bigger and be able to generate its own light! But it's not considered a planet anymore because it's too small, probably.

Answer 4

Pluto is definitely not a star. Stars must emit light and be powered by thermonuclear fusion. Pluto is now called a dwarf planet.

Answer 5

PLuto is a dwarf planet or an asteroid because it is not big enough to meet the definition of a planet

Answer 6

It is really a silly academic argument, and the only one to benefit from it are the textbook publishers. Pluto has an irregular orbit, it is very small, and it shares its orbit with its comparatively large moon Charon. It turns out that there are other objects in our solar system that are of similar size and composition as Pluto, and some astronomers were concerned that we would have to include them as new planets as well. Some examples are Ceres in the asteroid belt and Xena in the Oort cloud. This fight isn't done, mark my words.

Answer 7

Pluto is NOT a star. It's FAR too small and doesn't emit light. It's not a planet either - it's too small, has a moon almost as big as it is, and it hasnt' cleared it's orbit.

Answer 8

I think it is b/c Pluto is so small that it is not considered a planet. I also think its not a star b/c scientists say its not.

Answer 9

For reasons that 2nd grad science book will explain it is not a star. It is not a planet because it does not control it's own area. I.E. not large enough to have a gravity force exerted on neighboring material. No moons of it's own.
B