WTH? 11 planets? 38 replies

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emonkies

I'm too cool to Post

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17th July 2003

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#1 10 years ago

Just saw this and was scratching my head Mnemonic for 11 planets sure beats "Roy G. Biv," "Homes" - Machinist - Salon.com

Maryn Smith, a 10-year-old fourth-grader at Riverview Elementary School in Great Falls, Mont., knows that there are 11 planets in the solar system.

In order of increasing distance from the sun, they are, of course, Mercury, Venus, Earth, Mars, Ceres, Jupiter, Saturn, Uranus, Neptune, Pluto and Eris.

I have never heard of Ceres being listed as a planet.

Didnt Pluto get demoted from planet status?

And wasnt Eris listed as just a planetoid even smaller than Pluto?




masked_marsoe VIP Member

Heaven's gonna burn your eyes

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16th April 2005

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#2 10 years ago

Ceres, Eris and Pluto were put in the "dwarf planet" category. I assume the National Geographic article which the above was done for will explain their reasoning for including "dwarf planets" with planets.

wikipediaThis classification states that bodies that are large enough to have cleared the neighbourhood of their orbit are defined as planets, while those that are not massive enough to have acquired a round shape are defined as small solar system bodies. Dwarf planets come in between and have been called by some astronomers as "something that looks like a planet, but is not a planet".



Karst

I chose an eternity of this

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6th January 2005

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#3 10 years ago

Well, the definition is arbitrary anyway. It's not like there's some fundamental difference between, say, Mercury and a big asteroid like Ceres.




arcadeplayer987

Revenge was here.

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25th April 2007

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#4 10 years ago

What is with that link??




LIGHTNING [NL]

FH2 Developer

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30th May 2003

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#5 10 years ago

It would be more correct to say there are 11 identified planets (of which 8 are regular planets (4 solid and 4 gas) and 3 are dwarf planets). It's expected that there are many more dwarf planets in the outer edges of out solar system.




BruceDawg

Slightly cooler than a n00b

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1st March 2008

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#6 10 years ago

The Oort cloud is probably filled with dwarf planets about the size of pluto... besides, as long as astronomers have a set definition for things, it becomes arbitrary.




Guest

I didn't make it!

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#7 10 years ago

unless cres is the asteroid belt, I never heard of it I think I heard something about Eris once




Rich19

Italicised no more

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14th August 2004

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#8 10 years ago
nanobot_swarm;4241975unless cres is the asteroid belt, I never heard of it I think I heard something about Eris once

Ceres was one of the largest asteroids, until it was reclassified a dwarf planet along with Pluto.

Ceres (dwarf planet) - Wikipedia, the free encyclopedia




emonkies

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17th July 2003

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#9 10 years ago

I know about Ceres, I just didnt know it was now considered a planet.

And I remember the big hoopla a year or two ago about Pluto getting demoted.

And I know about Eris but it was being referred to as a planetoid at the time because it was even smaller than Pluto which last I knew was still being called a planetoid.

EDIT: Apparently Pluto and Eris are now "dwarf planets" as Lightning I think mentioned.




Psychokenesis

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16th October 2003

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#10 10 years ago

how could you exclude pluto and then include ceres and Eris.. that makes as much sense.