If Pluto is no longer planet cause nothing can live on it what about all the other planets??

Answer 1

Pluto also designated (134340) Pluto or 134340 Pluto is the second-largest known dwarf planet in the solar system and the tenth largest observed body directly orbiting the Sun. It orbits between 29 and 49 AU from the Sun, and was the first Kuiper Belt object to be discovered. Approximately one-fifth the mass of the Earth's Moon, Pluto is primarily composed of rock and ice. It has an eccentric orbit that is highly inclined with respect to the planets and takes it closer to the Sun than Neptune during a portion of its orbit.

Pluto and its largest satellite, Charon, could be considered a binary system because they are closer in size than any of the other known celestial pair combinations in the solar system, and because the barycenter of their orbits does not lie within either body. However, the International Astronomical Union (IAU) has yet to formalize a definition for binary dwarf planets, so Charon is currently regarded as a moon of Pluto. Two smaller moons, Nix and Hydra, were discovered in 2005. Pluto is smaller than several of the natural satellites or moons in our solar system.

From its discovery by Clyde Tombaugh in 1930, Pluto was considered the Solar System's ninth planet. In the late 20th and early 21st century, many similar objects were discovered in the outer solar system, most notably the trans-Neptunian object Eris which is slightly larger than Pluto. On August 24, 2006 the IAU defined the term "planet" for the first time. This definition excluded Pluto, which was then reclassified under the new category of dwarf planet along with Eris and Ceres. Pluto is also classified as the prototype of a family of trans-Neptunian objects. After the reclassification, Pluto was added to the list of minor planets and given the number 134340.

Answer 2

The debate came to a head in 2006 with an IAU(international astronomical union) resolution that created an official definition for the term "planet". According to this resolution, there are three main conditions for an object to be considered a 'planet':

1. The object must be in orbit around the Sun.
2. The object must be massive enough to be a sphere by its own gravitational force. More specifically, its own gravity should pull it into a shape of hydrostatic equilibrium.
3. It must have cleared the neighbourhood around its orbit.

Pluto fails to meet the third condition. The IAU further resolved that Pluto be classified in the simultaneously created dwarf planet category, and that it act as prototype for a yet-to-be-named category of trans-Neptunian objects, in which it would be separately, but concurrently, classified.

Answer 3

Olivia is correct. Pluto fails to meet the new IAU definition of planet because it has not cleared the neighborhood of its orbit. In fact, Pluto is just the largest of a number of objects, sometimes called "Plutinos", that orbit in a 3:2 resonance with Neptune.

Answer 4

All the other planets are still okay, for the time being. The techincal definition of "planet" in our solar system is a celestial body that:
(a) is in orbit around the Sun (it goes around the sun)
(b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (near spherical) shape (it's round because it's so big)
(c) has cleared the neighbourhood around its orbit (they have a lot of gravity so the area around them is open)

Pluto is not a planet because it has not cleared the neighbourhood, as it says in (c). As far as we know, Earth is the only planet that has life on it. Hope this helps!

Answer 5

Planet is a word and has a definition dependent on the circumstances surrounding it's use.
Recently a group of scientists chose to declare themselves able to define what is meant by the word planet.
It is perfectly correct for them to determine what definitions to use when the jargon they use is appropriate.
Only over time will we find whether common usage will change. Pluto has been the ninth planet since it was predicted to exist and someone was able to acquire evidence of its existence the first half of last century.
There are many examples of science or math having a particular definition for a word and for common usage to entail a significantly different meaning.
The historical definition has just as much of a chance of being the common usage meaning as the recently approved definition.

Answer 6

The reason it was reclassified as a dwarf planet is because it is much smaller than was once believed. We once thought it was bigger than Mars but now know it is really smaller than the Moon. It is too small to be lumped in with the big planets. It has nothing at all to do with the fact that nothing can live on it.

Answer 7

Its no longer a planet not because nothing lives on it (we don't know that for sure), but because it doesn't meet the criteria set out by the association of international astronomers.
A planet has to be a sphere due to its gravity, it has to orbit a sun, and have cleared the space around it of debris.

Answer 8

I agree that Pluto should be classified a planet, but that's not why it isn't. Some of the arguments are: "Pluto is made of ice", "it is too small", "it could be a comet that is close enough to orbit the Sun, but not close enough to burn up".

Answer 9

I thought that Pluto wasn't a planet because it has an eliptical orbit, much like a comet, though also because it was thought to be an escaped moon of Jupiter and because it was so small.

Answer 10

That's not why it's not a planet retard... do your research! It has something to do with its orbit.