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Celebrate the 86th aniversary of the discovery of Pluto! Watch

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    Pluto, discovered by Clyde W. Tombaugh on 18th February 1930 was originally believed to be the ninth planet in the solar system. How wrong we were!

    However, Pluto is a wonderful thing to look at. So why don't we celebrate this anniversary (on Thursday) by posting all the facts and figures about Pluto (along with some things that we like about it).

    To Pluto!

    :moon:
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    In my eyes, Pluto will always be a planet.
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    (Original post by Mayhem™)
    In my eyes, Pluto will always be a planet.
    Any particular reason why?
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    (Original post by Kyx)
    Any particular reason why?
    It was a dwarf planet when I first heard of it, so that's how it'll always be
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    (Original post by Mayhem™)
    It was a dwarf planet when I first heard of it, so that's how it'll always be
    Dwarf planet is not a planet.

    More of a planetoid
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    (Original post by Kyx)
    Dwarf planet is not a planet.

    More of a planetoid
    don't argue with my 6 year old self
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    (Original post by Mayhem™)
    don't argue with my 6 year old self
    Oh Kay
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    We were not wrong. Pluto still IS a planet. There is absolutely no need to accept the controversial demotion of Pluto, done by just four percent of the IAU, most of whom are not planetary scientists but other types of astronomers. That decision was immediately opposed by hundreds of professional astronomers led by New Horizons principal investigator Alan Stern. Stern and like-minded scientists instead support the geophysical planet definition, according to which a planet is any non-self-luminous spheroidal body orbiting a star, free floating in space, or even orbiting another planet. If a celestial object is not a star itself and is large enough and massive enough to be squeezed into a round or nearly round shape by its own gravity, it is a planet according to this definition. Dwarf planets are simply a third subclass of planets in addition to terrestrials and jovians. That was the intention of the person who coined the term, Alan Stern.
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    (Original post by Kyx)
    Dwarf planet is not a planet.

    More of a planetoid
    No, Pluto is not a planetoid because the word planetoid is a synonym for asteroid, which Pluto is not. Asteroids are tiny, loosely held together rocks shaped only by their chemical bonds while Pluto is a complex world with geology and weather, large enough and massive enough to be rounded by its own gravity. That makes it a small planet.
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    We were not wrong. Pluto still IS a planet. There is absolutely no need to accept the controversial demotion of Pluto, done by just four percent of the IAU, most of whom are not planetary scientists but other types of astronomers. That decision was immediately opposed by hundreds of professional astronomers led by New Horizons principal investigator Alan Stern. Stern and like-minded scientists instead support the geophysical planet definition, according to which a planet is any non-self-luminous spheroidal body orbiting a star, free floating in space, or even orbiting another planet. If a celestial object is not a star itself and is large enough and massive enough to be squeezed into a round or nearly round shape by its own gravity, it is a planet according to this definition. Dwarf planets are simply a third subclass of planets in addition to terrestrials and jovians. That was the intention of the person who coined the term, Alan Stern.
 
 
 
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