answersLogoWhite
Planetary Science
Dwarf Planet Pluto
Dwarf Planets

What is a dwarf planet?


Top Answer
User Avatar
Wiki User
Answered 2017-09-19 11:44:56

A dwarf planet, as defined by the International Astronomical Union (IAU), is a celestial body orbiting the Sun that is massive enough to be rounded by its own gravity but which has not cleared its neighbouring region of planetesimals and is not a satellite of a planet.

The term dwarf planet was adopted in 2006 by the International Astronomical Union, or IAU, to define the status of planets, including newly discovered bodies orbiting the Sun at vast distances past Pluto. Rather than have an open-ended number of planets, this classification set the number at 8, reclassifying Pluto as a dwarf planet. It shares this class with the asteroid Ceres and the Kuiper Belt objects Haumea, Makemake, and Eris. The planetoid Sedna is a current candidate for this classification, as are more than 10 other trans-Plutonian objects and the asteroids Vesta and Pallas.

In order to be classified as a planet, the object must meet three criteria:

  1. It must orbit the Sun, not another planet.
  2. It must have achieved "hydrostatic equilibrium", meaning that its gravity has crushed the object into a spherical shape.
  3. It must have "cleared the neighborhood" of its orbit, so that nothing else orbits the Sun near the planet.

The criteria were somewhat controversial, and are subject to revision by later conventions of the IAU. Objects that met the first two criteria but not the third were classified as "dwarf planets".

Interestingly enough, the planet Earth also fails to meet the third criterion, as there are a few small asteroids which occasionally approach the Earth in their own orbits around the Sun.

001
๐Ÿ™
1
๐Ÿคจ
0
๐Ÿ˜ฎ
1
๐Ÿ˜‚
0
User Avatar

Your Answer

Still Have Questions?

Related Questions

What is the other name of 134340?

The dwarf planet Pluto.The dwarf planet Pluto.The dwarf planet Pluto.The dwarf planet Pluto.


What is Pluto the dwarf planet an example of?

Pluto the dwarf planet is an example of of a dwarf planet.


Is Pulto a planet or a dwarf planet?

A dwarf planet it used to a be a planet


What planet is a dwarf?

Pluto is a dwarf planet.


What type of planet is dwarf planet?

dwarf is a dwarf planet because it is to small to be in the solar system.,


What planet is known as the dwarf planet?

Pluto is known as the dwarf planet.


Is Pluto still a planet or dwarf planet?

Its still a dwarf planet


Which planet is referred to as a dwarf planet?

Pluto is referred to as dwarf planet.


Why is mercury a dwarf- planet?

Mercury is not a dwarf planet. It is a planet.


Is Pluto the biggest dwarf planet?

No Pluto is not the biggest dwarf planet Eris is the biggest dwarf planet.


Is Ceres a gas dwarf planet?

Ceres is a dwarf planet. There is no such thing as a gas dwarf planet - Yet!


Where is dwarf planet Hi'iaka?

Hiʻiaka is the larger, outer moon of the dwarf planet Haumea.It is NOT a dwarf planet.


Is Quaoar an official dwarf planet or nearly certain dwarf planet?

Quaoar is an official dwarf planet.


Is Pluto a star or a dwarf planet?

dwarf planet (:


Is Jupiter a planet or a dwarf-planet?

No. Jupiter is not a dwarf planet. Pluto, Ceres, Eris, Makemake, Hauma are dwarf planets.


Which planet is hard to find and is a dwarf planet?

That planet, a dwarf, is called Pluto.


Which planet is now called a 'dwarf' planet?

Pluto used to be classified as a planet; now it is officially considered a "dwarf planet".


What does it mean to say that a dwarf planet neighborhood has not been cleared out?

A planet close to a Dwarf Planet is Destroy or now another Dwarf Planet to


What is a dwarf planet and explain?

a dwarf planet is a planet that is smaller than usual, and it is called a dwarf planet because it is smaller than usual


What type of planet is Planet Pluto?

a dwarf planetAcording to NASA Pluto is a dwarf planet.


Is Pluto a planet or a dwarf planet?

it is a dwarf planet since 2006. it is a very small planet.


Is Pluto a dwarf planet or a planet?

It was a planet until 2006, it is now designated a dwarf planet


What is the difference between a planet and a dwarf planet?

A planet is a planet that has a normal orbit. A dwarf planet is a planet that has an irregular orbit.


Is Makemake a dwarf planet?

Yes, Makemake is a dwarf planet.


Is charon a dwarf planet?

No, it is a satellite of the dwarf planet Pluto.


Still have questions?