What is Pluto now classified now that it is not a planet?

Answer 1

-a dwarf planet
Why is Pluto no longer considered a planet?

Since its discovery in 1930, Pluto has been a bit of a puzzle:

* It's smaller than any other planet – even smaller than the Earth's moon.
* It's dense and rocky, like the terrestrial planets (Mercury, Venus, Earth and Mars). However, its nearest neighbors are the gaseous Jovian planets (Jupiter, Saturn, Uranus and Neptune). For this reason, many scientists believe that Pluto originated elsewhere in space and got caught in the Sun's gravity. Some astronomers once theorized that Pluto used to be one of Neptune's moons.
* Pluto's orbit is erratic. The planets in our solar system all orbit the Sun in a relatively flat plane. Pluto, however, orbits the sun at a 17-degree angle to this plane. In addition, its orbit is exceptionally elliptical and crosses Neptune's orbit.
* One of its moons, Charon, is about half Pluto's size. Some astronomers have recommended that the two objects be treated as a binary system rather than a planet and satellite.

These facts have contributed to the long-running debate over whether to consider Pluto a planet. On August 24, 2006, the International Astronomical Union (IAU), an organization of professional astronomers, passed two resolutions that collectively revoked Pluto's planetary status. The first of these resolutions is Resolution 5A, which defines the word "planet." Although many people take the definition of "planet" for granted, the field of astronomy had never clearly defined what is and is not a planet.

Here's how Resolution 5A defines a planet:

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 neighbourhood [sic] around its orbit [ref].

Pluto is relatively round and orbits the Sun, but it does not meet the criteria because its orbit crosses Neptune's orbit. Critics of the resolution argue that other planets in the solar system, including the Earth, have not cleared the neighborhood around their orbits. The Earth, for example, regularly encounters asteroids in and near its orbit.

Answer 2

No, it is a dwarf planet, together with five other objects in the solar system. Which also have moons. To be a planet: 1. Orbit around a star (and not another planet). 2. Be in hydrostatic equilibrium (which means the surface of the planet is spherical or egg shaped, depending on the rotation of the planet and not for example looking like a large potatoe, which is defining the minimum mass for a planet from an astronomers sight) 3. Have cleared the orbital neighborhood of other objects (which means, have enough gravity to dominate this region). All eight planets are each 90% of the mass in their orbital region, Pluto is not even 15%. Pluto got degraded, because it is part of a large group of objects, called Plutinos, which are orbiting around the sun with roughly the same orbit period as Pluto - suggesting that they formed by a collision in early history. Pluto has the first two attributes of a planet, but not the third, that is why it is a Dwarf Planet. If Pluto would only have had the first attribute, it would have been an asteroid today - even asteroids can have moons BTW (Ida & Dactyl for example).

Answer 3

Pluto (IPA: BrE /ˈpluːtəʊ/, AmE /ˈplutoʊ/), also designated (134340) Pluto (See Minor planet names), 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

Answer 4

The scientific definition of "planets" that lay beyond Pluto is dwarf planets.

Answer 5

Thats a crock lets remove pluto.well if it wernt 4 pluto we would not be here.that big lady is holding in place man.some where down the line some quack scientist wanted to blow-up the moon face it some scientist are not that bright
lets re write our books now lets re write histery too clombus is a lier he did not discover America the indians did

Answer 6

It's a Dwarf Planet, like Eris and Ceres. Basically just oversized asteroids.

Answer 7

Mickey Mouse's Dog

Answer 8

Dwarf planet (whatever that means)

Answer 9

scientist thinks it may be a asteroid of kiuper belt or a moon of neptune that`s been out of it`s orbhit

Answer 10

it is a dawf planet