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Asked by Sammy to Chris, Hayley, Jimi, Maddison, Omur on 14 Mar 2016. This question was also asked by ps_no1.
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Maddison Coke answered on 14 Mar 2016:
Someone found another space object beyond Pluto- it was larger then Pluto so he named it a planet. But is was so far away from the sun it caused there to be a big discussion with all the people who name planets as to what really defines a planet in our solar system. They decided that due to its size and location that it couldn’t really be defined as a planet so they decided it was a dwarf planet. The planet itself didn’t change only the title that us humans gave it.
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Omur Tastan answered on 14 Mar 2016:
Because, it is small. 🙂 I guess we named it as a planet first and by the times we came up with some main rules re being a planet, Pluto couldn’t tick some of those boxes. Hence they decided to call it a dwarf planet because it was small, mainly 🙂
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Jimi Wills answered on 15 Mar 2016:
There’s also some discussion around it’s orbit, which is very irregular compared to the other planets.
Comments
Mimuna04 commented on :
I think it is quite amazing how we are able to identify planets just by thinking about our solar system.
Sammy commented on :
Oh!
thank you very much
widow commented on :
but why did they downgrade it to a dwarlf planet
Deeps 2005 commented on :
I’v heard a rumor that once Pluto was struck by an asteriod but the end of the dinosaurs was a lot worse !