[meteorite-list] There Were Once 18 Planets...

From: Larry Lebofsky <lebofsky_at_meteoritecentral.com>
Date: Wed Sep 13 17:57:35 2006
Message-ID: <1158184652.45087eccb59da_at_hindmost.LPL.Arizona.EDU>

All:

10 Hygiea (cvorrect spelling, though sometimes seen as Hygeia). Nice asteroid
(on the "list" for dwarf planet), looked at it lots of times (C-class).

Larry

Quoting Ron Baalke <baalke_at_zagami.jpl.nasa.gov>:

>
> http://www.spaceweather.com/
>
> SpaceWeather.com
> September 12, 2006
>
> 18 PLANETS: Have you ever heard of the planet Hygea? It's
> listed in the 1850 Annual of Scientific Discovery along
> with 17 other planets:
>
> [Full Text Graphic]
> http://www.spaceweather.com/swpod2006/13sep06/Pollock1.jpg
> Courtesy Joe Pollock, Appalachian State University.
>
> In those days, large asteroids such as Hygea, Ceres and
> Vesta were widely deemed planets. They appeared so in
> textbooks and scientific journals. Adding asteroids to the
> other known planets, Mercury, Venus, Earth, Mars, Jupiter,
> Saturn, Uranus and Neptune, gave a grand total of 18. Imagine
> the mnemonic: "My Very Educated [insert ten adjectives here]
> Mother Just Served Us Noodles."
>
> The asteroids were eventually demoted. It was a long,
> drawn-out affair, marked by decades of disagreement and
> confusion. (Sound familiar?) By 1900, however, order was
> restored to the Solar System: the planet count was down to
> eight.
>
> And then came Pluto...
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Received on Wed 13 Sep 2006 05:57:32 PM PDT