Who says Pluto is not a planet anymore??? after all this years..?

Answer 1

it was a majority decision by astronomers belonging to the astronomical union which was strongly influenced by the discovery of other similar objects in the outer region of the solar system called the kuiper belt some of which were even larger than pluto

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

Some astronomers have long argued that Pluto's small size, less than one-fifth the diameter of Earth, and a weird tilted orbit that takes it inside Neptune every couple hundred years make Pluto more like a Kuiper Belt body than a full-fledged planet. On August 24, 2006, the International Astronomical Union passed a new definition of planet that excludes Pluto and puts it in a new category of "dwarf planet."

Answer 4

The majority of astronomers in the world, that's who. When it was discovered in 1930, the size was estimated to be larger than Mars but smaller than Earth. But it was only estimated because no telescope available could actually see it as anything but an unresolved dot, like a star. Since then there has been an occultation, where Pluto passes in front of a star, and by timing how long takes to pass in front of that star we can calculate its size accurately, plus the Hubble telescope has been able to just barely see its size directly. It is smaller than the Moon. And other equally small objects are being discovered at an increasing rate so that we now know Pluto is just one of many asteroids orbiting in a second belt beyond the orbit of Neptune.

The same thing happened to Ceres. It was in books as a planet from 1801 to about 1850 or so, but with the realization of its small size and the discovery of other small bodies between Mars and Jupiter, the new word asteroid was coined to apply to such things.

Answer 5

They just decided to change the definition of planet so Pluto doesn't fit. I think they did it because there are a lot of rocks getting discovered lately, and if we call Pluto a planet, we have to call all of them a planet.

It is much easier to say we have eight real planets and a bunch of dwarf planets than to have the number of planets be a constant questions mark--new dwarf planets will continue to be discovered, and once they are, it will take time for them to be confirmed and recognized. With the eight-planet definition, we can tell kids in school there are eight planets and a bunch of dwarf planets like Pluto, instead of complicating the question and leaving the answer open to contant updates for new discoveries.

Answer 6

after discovering several new objects like pluto some of which are bigger than pluto scientist think that it does not got end so they redefine the definition of a planet the new condition they bind is that it's orbit should not come in path of other planet and it should be round or near to round in shape the later is fulfil by pluto but not by some other objects like Xena but pluto fails in first condition as its orbit come inside that of neptune and as neptune is bigger in size so pluto get lost thats all.
I think this is the most genuine answer?

Answer 7

Scientists do but why are we still talking about this. It's really getting old. Pluto is now a dwarf planet and we just have to deal with it.

Answer 8

Any space body that has its own moon must be defined as a planet! Therefore since Pluto has its own moon it is a planet!

Answer 9

The fools are saying this. Didn't you see that there are astrology systems in India which are considering Pluto as a one feature in it. It is a part of Indian astrology. It has been learnt from 100s of years and now the fools are saying that the Pluto is not a Planet. They are rugge dummies for the Dark Magician.

Answer 10

The Astronomers