why planet pluto lost its status ?

Answer 1

http://www.iau.org/fileadmin/content/pdfs/Resolution_GA26-5-6.pdf

pluto is not a planet, but pluto orbits the sun, is round, does not have an isolated orbit (a bunch of other similar bodies have similar orbits.), and is not a satellite so it is a dwarf planet. this does not change anything about the solar system or pluto. it just corrects the mistake of classifying pluto as a planet initially.

this same thing has happened before. beginning in 1800, astronomers found a few bodies orbiting between the orbits of mars and jupiter, and they finally stopped calling them planets after the fourth discovery. 150 years from now, no one will think of "134340 pluto" as a planet. very few will even know we classified it as a planet. "1 ceres" and "136199 eris" are other dwarf planets.

i have been waiting for this since i was about twelve. i feel somewhat satisfied. i knew that pluto didn't fit the pattern set by the major bodies in the solar system so it was an anomaly. it just felt illogical and "out of place". this was the right thing to do, believe me. i don't understand why so many are having such a problem with this.

i don't know how long this will drag on tho. many planetary scientists are not satisfied that the definition is rigorous enough.

http://en.wikipedia.org/wiki/Dwarf_planet
http://en.wikipedia.org/wiki/1_Ceres
http://en.wikipedia.org/wiki/Pluto
http://en.wikipedia.org/wiki/Eris_%28dwarf_planet%29

Answer 2

Pluto, the last planet to join the heavenly pantheon, became the first to leave it. The status of Pluto had been under discussion for some time, but with the discovery of 2003 UB313, nicknamed Xena, the question became acute, for it seemingly had as much right as Pluto to be called a planet.

On August 24, 2006, the International Astronomical Union surprised the world by voting in a new definition of planet, one that would exclude Pluto and bring the total number down to eight. (There had previously been been strong speculation that the redefinition would bring the total up to 12 instead of down.)

Pluto was instead classified as a dwarf planet, along with Ceres and the aforementioned Xena. The main difference between a dwarf planet and the real thing is that the dwarf variety has not cleared the area of its orbital path.

This redefinition met with a wave of protests from those who wanted to see the ninth planet grandfathered in, including but not limited to supporters of the late Clyde Tombaugh, who discovered Pluto in 1930. His widow, however, said he would have been accepting of the IAU's decision since "he was a scientist" and understood that astronomers had to take into account newly discovered objects in the Kuiper Belt (where Pluto is located).

But opponents of Pluto's demotion remain unconsoled and have generated a thriving industry in T-shirts, mugs and other memorabilia. Among the many slogans of this movement was one which played on the mnemonic for the names of the erstwhile nine:

Answer 3

According to the new definition, a full-fledged planet is an object that orbits the sun and is large enough to have become round due to the force of its own gravity. In addition, a planet has to dominate the neighborhood around its orbit.

Pluto has been demoted because it does not dominate its neighborhood. Charon, its large "moon," is only about half the size of Pluto, while all the true planets are far larger than their moons.

In addition, bodies that dominate their neighborhoods, "sweep up" asteroids, comets, and other debris, clearing a path along their orbits. By contrast, Pluto's orbit is somewhat untidy


secondly,Pluto's orbit is very different from that of other planets' orbit.it is highly influenced or even i can say its affected by the gravitational effect of it neighbor -Neptune.this causes Pluto's orbit to overlap with that of Neptune's,a planet should not overlap the orbit of it neighbor or any others..

Answer 4

Primarily is a redefinition of what actually is a planet. Pluto has an irregular orbit that actually is at times closer to the sun than Neptune (extremely rare and true for only a few years & until recently so). This makes it more like a comet in behavior.

The composition of Pluto is more like a comet than a planet (ice and dust).

There are several moons in our system(Europa, Gannymede, Io and Titan, for example) that dwarf Pluto manifold. They behave and were materialized in many ways more like planets.

Xena, beyond Pluto, has been substantiated as a "more planetary body", and other outer bodies, are giving rise to the theory that Pluto is merely a large comet (with a larger moon of mass - Charon!).

Solar Systematic Mass balance would count Pluto as a dandelion seed in Scotland; a snowflake in the grand mass of a nearly twin star system.

Most masses of size in our system emit energy of their own. Pluto shall hopefully remain but a sentiment of icy sediment...nothing spherical, hardly the size of New Foundland; the stuff of fantasy and fondness.

Simply not measuring up.

Answer 5

The IAU members gathered at the 2006 General Assembly agreed that a "planet" is defined as 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 neighbourhood around its orbit.

This means that the Solar System consists of eight "planets" Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. A new distinct class of objects called "dwarf planets" was also decided. It was agreed that "planets" and "dwarf planets" are two distinct classes of objects. The first members of the "dwarf planet" category are Ceres, Pluto and 2003 UB313 (temporary name). More "dwarf planets" are expected to be announced by the IAU in the coming months and years. 

Aloha

Answer 6

Pluto did not meet the rules of the I.A.U. because "It doesn't clear the neighbourhood around it's orbit" so it was demoted to the status of minor planet along with Xena and Sedna.

Answer 7

because human recently created a law that tells that in order for a piece of rock to be considered as a planet, it must first comply to the equatorial measure requirement and that it must follow the rule of "do not go else where while revolving around the sun" and because pluto don't follow the laws, the humans granted him the "Demotion for Planetary Status."

Answer 8

this came from my brain:

i read somewhere that to be classified as a planet; it has to be a sphere like shape, it has to orbit the sun in a circle like shape and it has to be a certain size big.

although it has a moon it's still not a planet

Answer 9

Due to it's size, smaller than Earth's Moon, and it's tilted orbit, Pluto is a dwarf planet.

Answer 10

Because the fact show that it is not a planet anymore.

By the way tell you some jokes:

-Doctor! I have a serious problem, I can never remember what i just said.
-When did you first notice this problem?
-What problem?

One more joke:

A guy calls his vet and says "What should I do with my cat?Vet says "What do you mean? Guy says "I had a leak in my lawnmowers gas tank and the cat drank the gas. Then the cat began to run around and around the yard, climbed a tree. then fell out of the tree stiff. Vet says "Is the cat dead? Guy replies "nope he ran out of gas.

Last of all just want to tell you that whatever you do, just don't give up. Also you must love and care for the people around you. In that way they will also show you the love that you show to them. Just be yourself and happy everyday. Wish you all the best and good luck!!