Dwarf Planets

In order for a celestrail body or an astromical body to be labeled as a dwarf planet it has to have a orbit around a star, has sufficient mass for it's self-gravity to overcome rigid body forces so that it has a nearly round shape, has not cleared the neighborhood around its orbit and it is not a satellite.

The dwarf planets discovered until now, are: Pluto (It takes 248 Earth days for 1 Pluto year and 6 Earth days for 1 Pluto day), Sedna (It takes 10.500 Earth years for 1 Sedna year and 10.27 Earth hours for 1 Sedna day), Eris (It takes 55 Earth years for 1 Eris year and 8 Earth days for 1 Eris day), Quaoar (It takes 285 Earth years for 1 Quaoar year but the duration of a day on Quaoar is unknown), Ceres (It takes 4.6 Earth years for 1 Ceres year and 1679.819 Earth days for 1 Ceres day)

History of Dwarf Planets:

- The Dwarf Planets got there name by a group of astronomers named the IAU. There were tons of small planets with odd revolution cycles. Instead of adding tons of more planets to the solar system, they made a new group named dwarf planets and Pluto fit into the definition of a dwarf planet. The place were the Dwarf Planets remain in space is behind Neptunes orbit. It is called the Kuiper Belt, named after the astronmer Gerard Kuiper. The Kuiper Belt is a place where remaining building bodies of our solar system are locadet.
- The five common dwarf planets are Pluto, Cires, Eris, Make Make, Haumea.
- Mike Brown estimates that there are more than 200 dwarf planets in the space close to our star.

Moons of Dwarf Planets:

- Pluto's moons are Charon, Nix, and Hydra. Charon was dicovered in 1978. Nix and Hydra where discovred in 2005 at the same time.
- Quaoar- Quaoar has no moons discovered yet.
- Eris- Eris has one moon discovered named Dysnomia.
- Sedna- Sedna has no moons discovered yet.
- Ceres- Ceres also has no moons discovered yet.

Measurement and Size:

-The Kuiper Belt is 4.5 billion km from the sun and it is located behind Neptune orbit whit the smallest diameter of 303 kilometers (185 miles) and the largest one of 2,400 kilometers(1,500 miles). The largest dwarf planet is about five times smaller then the Earth and the smallest one is about fiftey eight times smaller than the Earth.
- Pluto is about 5 billion km from the sun whit a diameter of 2274 km.
- Sedna's diameter is about ¾ the size of Pluto resulting in a diameter of 1,800 km. Sedna is 130 billion kilometers (84 billion miles) away from the San which is 900 times greater that the Earth's solar distance.
- Quaoar has 1250 km in diameter and is his volume is equal whit the volume of 50,000 asteroids. Quaoar is at 4 billion km away from the sun.
- Eris is placed at a average distance of 6.3 billion miles away from the sun and it has the same diameter like Pluto.

Names origin:
- Charon in greek mythology, was the boat man who carried souls of the dead to the underworld. The underworld was a kingdom ruled by the god, Pluto.
- Sedna is the name of a sea goddess. Sedna the Sea Goddess.
- Eris is the Greek Goddess of discord and strife. Eris is evil. Her hobbie is to make trouble. She has an Golden Apple (apple of discord) that is so birght and shiny that everyone wants it. When she throws it among friends, their friendships come to an end and when she throws it among enemies war breaks out. She did this once during the wedding of Peleus and Thetis, this brought the Trojon war.
- The name Quaoar is from Greek Mythology. At the beginning there was chaos, then came Quaoar. He was sad because the emtyness in existince and began to dance, whirl and twirl all around while he sang the song of creation.
- Dysnomia is (the moon of Eris) the mythological daughter of Eris. Dysnomia is the demon spirit of lawlessness.
- Nix is the goddess of Night and the daughter of mischief.
- Hydra is a dog monster with nine indistructible serpent haeds and deadly poisonous blood.

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