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    nakatsu's Avatar
    nakatsu Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Jun 16, 2008, 03:14 AM
    Additional planet
    How pluto consider as planet?

    What are the additional two planet that was discovered?
    Curlyben's Avatar
    Curlyben Posts: 18,514, Reputation: 1860
    BossMan
    		  
    #2

    Jun 16, 2008, 03:16 AM
    Pluto has recently been reclassified as a Dwarf Planet/Plutoid.
    What 2 "planets" are you referring to?
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
    Uber Member
    		  
    #3

    Jun 16, 2008, 03:23 AM
    There are only 8 discovered planets orbiting around the Sun.

    As of the time of writing, we have discovered 296 planets orbiting other stars.
    WVHiflyer's Avatar
    WVHiflyer Posts: 384, Reputation: 34
    Full Member
    		  
    #4

    Jun 21, 2008, 01:20 PM
    You might be referring to the objects found in the Kuiper Belt that rival and maybe surpass Pluto in size. I don't think they have been given official names yet (one discoverer wanted to call one of them Xena).
    Credendovidis's Avatar
    Credendovidis Posts: 1,593, Reputation: 66
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    #5

    Jun 21, 2008, 07:32 PM
    Pluto has been re-classified as a dwarf planet.
    Than there is what is called planetX, another dwarf planet far outside the orbit of Pluto.
    Also there is another dwarf planet called Xena, even further out.
    A dwarf planet is more an asteroid that was big enough to become a sphere.

    ·
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
    Expert
    		  
    #6

    Jun 23, 2008, 05:30 AM
    The International Astronomical Union has recently settled on the name "plutoid" to describe dwarf planets like Pluto which orbit beyond Neptune. With this new definition there are now two recognized plutoids: Pluto and Eris. Up until recently Eris was known as a trans-Neptunian object, so in a way it has been "promoted" to be in the same class as Pluto. So that means the solar system now has 8 recognized planets and 2 plutoids. Perhaps that is what the OP meant by two planets being discovered? It's not clear at this point what the IAU will call large objects that orbit inside the orbit of Neptune, such as Ceres.

    See: Pluto Now Called a Plutoid - Yahoo! News
    lalla1995's Avatar
    lalla1995 Posts: 36, Reputation: -1
    Junior Member
    		  
    #7

    Jun 23, 2008, 06:41 AM
    I only know one planet that was discovered, it is named UB313.
    Curlyben's Avatar
    Curlyben Posts: 18,514, Reputation: 1860
    BossMan
    		  
    #8

    Jun 23, 2008, 06:42 AM
    Quote Originally Posted by lalla1995
    I only know one planet that was discovered, it is named UB313.
    UB313 ISN'T a planet at all, but simply another dwarf.
    Eris (dwarf planet) - Wikipedia, the free encyclopedia
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
    Expert
    		  
    #9

    Jun 23, 2008, 06:48 AM
    Quote Originally Posted by Curlyben
    UB313 ISN'T a planet at all, but simply another dwarf.
    Eris (dwarf planet) - Wikipedia, the free encyclopedia
    Seems that Wikipedia article is out of date - now that Eris is known as a plutoid.
    Curlyben's Avatar
    Curlyben Posts: 18,514, Reputation: 1860
    BossMan
    		  
    #10

    Jun 23, 2008, 06:50 AM
    Time to get editing then ;)
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