Why exactly was Pluto demoted?

Question

Pluto was demoted and some asteroid became a planet? What exactly happened?

Answer 1

the international astronomical union defined three terms "planet", "dwarf planet", and "small solar system body". this does not change anything about the solar system or pluto. it just corrects the mistake of classifying pluto as a planet initially.

i have known since i was about twelve that pluto does not have the physical and orbital characteristics that fit the pattern set by the major bodies in the solar system, and later, after the discovery of hundreds of other similar bodies with similar orbits, i knew this was inevitable. this was the right thing to do, believe me.

because pluto orbits the sun, is round, orbits the sun with a bunch of other similar bodies with similar orbits, and is not a satellite it is a dwarf planet.

(1) A planet is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has cleared the neighborhood around its orbit.

(2) A dwarf planet is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, (c) has not cleared the neighborhood around its orbit, and (d) is not a satellite.

(3) All other objects orbiting the Sun shall be referred to collectively as "Small Solar System Bodies".

Answer 2

Pluto is mainly ice. It's orbiting pattern is more fitting of a comet, because it doesn't remain in it's specific spot to be a planet (i.e. Earth is ALWAYS the 3rd planet away, Mars the 4th, etc.). Pluto's orbit pattern brings it in front of Neptune periodically. This orbiting behavior is exactly what a comet does. However, due to Pluto's size, it's the first comet found to contain it's own perfect atmosphere, and that doesn't shed itself off at a rate visible to the human eye (the tail you see when a comet is flying through the sky). That characteristic is exactly what an asteroid has. So really, there isn't a classification for Pluto yet. The asteroid that became a planet is supposed to be two times the size of Pluto, completely rocky, and orbits in a normal pattern (as long as the people at NASA did their math right).

Answer 3

Pluto is especially ice. that's orbiting development is greater setting up of a comet, because of the fact it would not proceed to be in that's particular spot to be a planet (i.e. Earth is often the third planet away, Mars the 4th, etc.). Pluto's orbit development brings it in front of Neptune periodically. This orbiting habit is precisely what a comet does. in spite of if, because of Pluto's length, that's the 1st comet stumbled directly to comprise that's own appropriate ecosystem, and that would not shed itself off at a value seen to the human eye (the tail you notice while a comet is flying interior the path of the sky). That function is precisely what an asteroid has. So extremely, there is not any longer a variety for Pluto yet. The asteroid that grew to grow to be a planet is meant to be 2 situations the dimensions of Pluto, thoroughly rocky, and orbits in a classic development (as long because of the fact the human beings at NASA did their math good).

Answer 4

Pluto criticized the Muslims

Answer 5

Well, it apparently happens that the astronomers and such decided that Pluto was more of a "white dwarf" planet than anything else. They changed the name to some number instead..

Answer 6

Pluto was always questionable as a planet. It isn't completely round, it's too small, and its orbit is off, Those Khyber[sp?] objects are not only bigger, but at the proper orbit to be considered 'real' planets.

Answer 7

Because Pluto, the dog was a disgrace to mankind

Answer 8

I thought it was demoted from being the last planet in our solar system. Apparently there is a new "last planet." What it is called? I don't know!

Answer 9

Oh...the rocket scientists over there probably needed something to spice up the world of outer space by f*cking everything up >.>

Seriously...they get billions of dollars to spend...and to what? To change the status of a rock in the middle of the atmosphere and outdate all the school's textbooks. Thanks a lot, space geniuses!

Answer 10

They say its not a planet but, an astroid