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http://en.wikipedia.org/wiki/Eris_%28dwarf_planet%29
http://en.wikipedia.org/wiki/Pluto

you must be asking about "136199 eris", but it is not a planet. it is about five percent bigger than "134340 pluto", but neither are planets. the solar system has eight planets. they are mercury, venus, earth, mars, jupiter, saturn, uranus, and neptune.

"136199 eris" and "134340 pluto" do orbit the sun, are ball-shaped, do not have an isolated orbit (a bunch of other similar bodies have similar orbits.), and are not a satellites so they are not a planets.

on 24 august 2006, the international astronomical union decided that pluto should not be categorized as a planet. i have been waiting for this since i was about ten when i learned that pluto didn't fit the pattern set by the major bodies in the solar system so it was an anomaly. it just felt "out of place". now that astronomers have found hundreds of other bodies with similar orbits, classifying "134340 pluto" as a planet is even more irrational. i feel somewhat satisfied, but i don't know how long this will drag on tho. many planetary astronomers are satisfied that the definition is rigorous enuf. i can accept that the definition is flawed, but i can not accept that "134340 pluto" is a planet.

this was the right thing to do, believe me. this does not change anything about pluto or the solar system. this just corrects the mistake of classifying pluto as a planet initially.

many astronomers consider pluto and charon to be a binary system, but two small bodies orbit that system. they are called nix and hydra.

incidentally, "134340 pluto" was never a moon of neptune. neptune did capture triton. this is why triton has a retrograde orbit.

2006-11-11 01:23:28 · answer #1 · answered by warm soapy water 5 · 2 0

Specific deviations in the movements of the planets Uranus and Neptune have recently been detected, which NASA says is convincing evidence to prove the existence of an as yet unknown solar body of at least 4 - 8 times the mass of Earth. This planet appears to have a very large orbit which brings it close to the Earth every 3000 - 3600 years. And should start to become visible to us on Earth somewhere about 2012 - 2036.
The planet is just beyond 7,000,000,000 from The Sun and NASA have yet to give it a name, or confirm it's size and velocity. This planet has been taken seriously by astronomers since 1978, and they call it "Planet X".
In 1983 something was spotted by IRAS ( Infrared Astronomical Satellite ), unusual and unexplained perturbations were found in the orbit of Neptune in the infrared spectrum, which cannot be explained by Pluto alone because it is not big enough. But several astronomers went over this in the late 1980's, but they were all unable to confirm anything.

2006-11-11 10:25:29 · answer #2 · answered by moghusai 4 · 0 1

There Isn't a planet added to our solr system! In contrast, a planet have been taken out of our solar system

2006-11-11 09:18:23 · answer #3 · answered by Ahmed M 2 · 0 0

Planet X unofficially called Planet Xena :)

2006-11-14 01:12:22 · answer #4 · answered by Siva 2 · 0 0

There hasn't been a planet added, pluto has been taken away. They have also started a new category of minor planets though.

2006-11-11 05:33:20 · answer #5 · answered by Thesmileyman 6 · 0 0

We've not had one added, Pluto has been taken out though because some smart geek thought it didn't qualify as a planet.

2006-11-11 04:48:46 · answer #6 · answered by Anonymous · 0 1

Chiron

2006-11-11 19:45:56 · answer #7 · answered by Sam 3 · 0 0

I remember readin this from a newspaper,
the name's UB 2003

2006-11-11 05:40:48 · answer #8 · answered by Kiru 2 · 0 0

planet X

2006-11-11 06:55:15 · answer #9 · answered by danachua 1 · 0 1

Rover

2006-11-11 04:50:49 · answer #10 · answered by pop 4 · 0 1

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