Dwarf Planets

Dwarf planets are celestial bodies orbiting around the Sun that are not counted as planets because of their small size. Find questions about the different Dwarf Planets here.

2,164 Questions

How many plutoids are there in your solar system?

FOUR are known at present.

"Plutoids" is another term for Dwarf Planets like Pluto. (The Dwarf Planet Ceres is not a Plutoid because it's in the asteroid belt.)

There are actually a few confirmed Plutoids in our solar system. Also there are some likely objects yet to be officially named as Plutoids. Most of them are only recently discovered due to new technology. Most of the new ones have a "codename" rather than an actual name.

The confirmed Plutoid Dwarf Planets are:

- Eris

- Pluto

- Makemake

- Haumea

Some Possible Plutoids:

- Sedna

- Orcus

- Quaoar

- 2002 TX300

- 2002 AW197

- 2003 AZ84

- 28978 Ixion

- 20000 Varuna

- 2004 GV9

- 38628 Huya

- 1996 TL66

- 2003 MW12

- 2005 RN43

- 2005 RN43

- 2003 OP32

- 2001 UR163

- 2004 SB60

- 2005 RM43

- 2004 UX10

- 1999 DE9

Then again, there is also a list of planet-like objects in space which could be Dwarf Planets. But they need to be assessed further with more research before they can be classed as a Dwarf Planet or an Asteroid.

We are constantly making new discoveries.

See the related links below for the full list of confirmed and possible Dwarf Planets.

Why is Pluto called the dwarf planet?

Pluto is a dwarf planet because it isn't big enough to be a major planet. (Earth, Mars, Mercury, etc.) There are other dwarf planets in our solar system, too.

How many dwarf planets are there?

There are currently 5 recognised Dwarf Planets.

  • Ceres - is between Mars and Jupiter in the asteroid belt.
  • Pluto
  • Eris
  • Makemake
  • Haumea

For a list of dwarf planet candidates, see related link.

There are currently five known "dwarf planets", but it is certain that there are many more in the Kuiper Belt that have not yet been identified.

Any body in the Kuiper Belt with enough mass to attain "hydrostatic equilibrium" - meaning that it has enough mass that its gravity crushes it into a sphere - will be another "dwarf planet". There may be dozens or hundreds of them, but they are so small and far away that we haven't noticed them yet.

Wait about 6 more years, until the James Webb Space Telescope is launched. It ought to be able to pick out a few.

NASA's "New Horizons" spacecraft will reach the Kuiper Belt during July 2015 to study Pluto and its moons up close for the first time, and also other objects in the belt.

When and why was Pluto demoted from the list of planets and made a dwarf planet?

In the year 2006.

Pluto was demoted because it did not have an orbit of its own, but shared its orbit with other Kuiper belt objects (KBOs).

(The link below should help answer your question better)

How much does Pluto weigh?

If you compare it to Earth and Earth is 1 for mass, Pluto is 0.002.

1.3057×1022 kg

2.8770×1022 pounds

Where is the planet zork?

Although there are many rumors and movies about the planet zork, all of it is not true for it does not exist!

When is the next time halleys comet will be visible from earth?

Halley's comet occurs ever 75->76 years. It last was seen from Earth in 1986 so astronomers predict that it will be seen again in the year of 2061.

What are the different theories of the creation of the planet?


One of the most commonly-held theories is that the Earth and the other planets developed over millions of years out of the dust and gas surrounding the sun when it was a young star. The vast majority of scientists hold to this view, which is considered the only viable theory by the scientific community.

Probably the most commonly-held hypothesis aside from the evolutionary model is that the Earth was created by an all-powerful being who also created the entire universe. This view is often described as the Creationist hypothesis. Though there are some scientists who hold this view, they are often overlooked by scientists who believe in evolution, or are mocked for their ideas, whether or not those ideas have affected their scientific work. This view is held by many Christians, though there is disagreement over whether the Earth was created at the time that life started here (taking the Biblical book of Genesis literally, called the Young Earth Model) or whether the Earth was already here at the time that life began here (called the Old Earth Model). The Old Earth Model includes aspects of both of the most common ideas.

Other hypotheses are generally restricted to particular cultures, based on their belief systems.

Specific theories and their development

The French mathematician and physicist Laplace, over one hundred years ago suggested that the sun was formed from the condensation of a nebula, a gaseous body. As the gaseous, rotating sun contracted, gaseous rings would be thrown off just like drops of water from a flywheel. These droplets later formed planets.

The planetesimal theory followed put forward by Chamberlain and Moulton. A star might have come close to the sun as to cause tremendous gravitational pulls upon each other, causing tidal waves, as it were, and erupting material into space.

Is a planetoids the same as a dwarf planet?

Not quite. Any non-planet that orbits the sun is referred to as a planetoid, while a dwarf planet is a specific class of planetoid.

How warm does it get on Pluto?

Pluto is very cold. the warmest it gets is 55 Kelvin or around -218 degrees Celsius.

Why is Pluto considered a dwarf planet?

Because it is not a true planet, it's designation has been changed after much debate and a vote by the leading experts in the field of astronomy. There is some disagreement still over the requirements of planet-hood. For example, there is still a lot of debris floating around out there, much of it in the vicinity of planetary orbits. But the remaining debris is relatively tiny compared to the planets, and they cannot now gather enough material to ever be in contention for possession of a given orbit.

All major planets have cleared their paths of debris. Pluto spends the great majority of its time in what is called the Kuiper Belt, a huge field of rocky and icy bodies beyond Neptune, at least one of which is larger than Pluto. As a result, Pluto is considered not to have 'cleared its path'. It is one of many interesting Kuiper Objects.

A popular misconception is that Neptune is involved in Pluto's reclassification because Pluto's orbit is, for roughly 15 years per cycle, within Neptune's orbit, suggesting that Neptune is 'debris' in Pluto's path. This makes no sense, because one could conclude that Neptune has not cleared its path of debris (Pluto) and is therefore not a planet. And in comparison, Pluto would more easily be defined as debris of Neptune, rather than calling the huge Neptune debris of Pluto. The fact is that neither Pluto nor Neptune is 'debris' in the other's path. The orbits are not coplanar, and they have a special and exact harmonic relationship that prevents them from ever colliding. During exactly two orbits of Pluto, Neptune orbits exactly three times. There are other similar harmonic relationships in the solar system. This arrangement between Pluto and Neptune is stable, and only some spectacular disturbance by some force outside of the solar system could disrupt it.

Where is quaoar?

Quaoar or better (worse) known as 50000 Quaoar is a binary trans Neptunian object and a candidate for a dwarf planet.

It is approximately 6.493 353 Tm (43.405 AU) from the Sun.

It was discovered on June 4, 2002 by Chad Trujillo and Michael Brown.

What planet is still forming?

Answer Forming PlanetThere is no one answer for this broad of a question. If the question is asking about planets in our solar system, the answer is both none and all of them. The planets are constantly evolving and before our Sun becomes a red giant and consumes the first half of the solar system, it is quite possible that more planets may have developed out of the Asteroid Belt, the Kuiper Belt, or the Oort Cloud. If asking about outside our solar system, the answer could be put like this: there are billions of galaxies with hundreds of billions of stars, each of which could have at least one planet orbiting it, but could also have several. Accepting that one of every 1,000,000 stars has at least one planet and one in 1,000,000 of those have three or more, then the number will still be an exponential number so massive that it would perfectly reflect the ridiculousness of fathoming numbers in astronomy.

Is there such thing as a planet sedna?

Yes, there is a celestial object called Sedna (90377 Sedna), which is a dwarf planet candidate orbiting far beyond Neptune and Pluto. Its closest approach to the Sun is about 1.5 times the maximum for Pluto, with an extreme elliptical orbit varying from 76 AU to 975 AU.

As the farthest identified object orbiting the Sun, Sedna takes about 12,000 Earth years to complete one orbit. It will reach its next closest approach to the Sun in the year 2075. Only the dwarf planet Eris is current farther from the Sun.

Its size is estimated at approximately three-quarters the size of Pluto, or about 1,000 miles (1200-1600 km) in diameter.

(For size comparison with Earth, Moon and Pluto, please see the link below)

More on Sedna

Sedna rotates very slowly. It takes at least 20 days to complete a rotation, maybe as long as 50 days. The gravitational pull of a moon would be the best explanation for this slow rotation. Almost all other minor bodies in the solar system rotate in a matter of hours. Pluto has a six-day rotation because it has a satellite, Charon. But Sedna has no moon.

Why are some planets called Dwarf Planets?

It is because they share their orbit with other objects, forming part of the asteroid belt or the Kuiper belt.

Temperature of the moon in the sun?

The moon has no atmosphere (well, not enough to matter) and so it experiences extreme temperature changes since there's no atmosphere to smooth things out. Noontime temperatures on the moon can reach as high as 123 degrees Celsius; at night it can drop as low as -233 degrees Celsius (in the south polar basin, which is permanently in the shade).

What eat Southern Dwarf Sirens?

I dont know if it was a dwarf siren because it was rather large ,but the owner of the light house landing resort and marina in grand rivers,kentucky photographed a grey herin ingulf a siren that looks to me to be at least 4ft long,could u imagine being witness? swallowed it hole...sweet

Is Pluto a dwarf planet?

Yes, according to the current definitions, Pluto is considered a "dwarf planet" along with 4 other dwarf planets.

What planet do aliens live?

No evidence of any life on any other planet

besides the Earth has ever been observed.

What do planets and dwarf planets have in common?

Planets and Dwarf Planets are both round, unlike asteroids, which are potato shaped.

What is the AU of Mercury?

Mercury's Astronomical units is .39 rounded off or if you want to be semi precise it would be .3870320856