[meteorite-list] Pluto's Fate to be Decided by 'Scientific andSimp
E.P. Grondine
epgrondine at yahoo.com
Wed Aug 16 10:37:31 EDT 2006
Hi all -
Combining two threads,
What if there turn out to be massive numbers of
objects fitting the new definition?
Why doesn't the naming committee just issue a
statemtent demanding a deep space observatory probe
before they consider changing the definition of
planet?
I suppose if they isued a statement like that it would
end the fun of coming up with new "planet" names and
memonics.
I am going to shut up now.
good hunting,
Ed
--- Larry Lebofsky <lebofsky at lpl.arizona.edu> wrote:
> Hi Ed:
>
> I have to go back and look at the article, but
> "massive" I think means like a
> gas giant, not Earth-sized, but I could be wrong. If
> there were an "Eath at 60
> or 70 AU, I am not sure it would have a lot of
> influence on Uranus, Neptune,
> or Pluto.
>
> Larry
>
> Quoting "E.P. Grondine" <epgrondine at yahoo.com>:
>
> > Hi Larry, all -
> >
> > Yeah, there could be massive bodies out there, but
> > there aren't. That's what Myles' study shows.
> >
> > What's sending the comets our way are our solar
> > system's passings through the plane of our galaxy,
> the
> > Milky Way. That's exactly what is shown in the
> > extinction record, and it confirms the
> gravitational
> > model work done by both British and Italian teams.
> >
> > When will NASA get over the not invented here
> syndrome
> > and stop wasting our money looking for Nemesis?
> Why
> > don't we spend it on sending some probes out to
> the
> > Kuiper belt and Oort cloud, where it might do some
> > good? Anybody here care to blue sky some designs?
>
> >
> > good hunting,
> > Ed
> >
> > --- Larry Lebofsky <lebofsky at lpl.arizona.edu>
> wrote:
> >
> > > Hi all:
> > >
> > > Depending on albedo, there could easily be
> > > Earth-sized bodies beyond the
> > > Kuiper Belt (do not remember the exact numbers
> off
> > > the top of my head but
> > > could find out). As far as perturbations are
> > > concerned, we are likely to be
> > > getting comets from the Oort cloud (that is how
> it
> > > was predicted) and these
> > > could knocked out of the cloud by passing stars
> the
> > > cloud goes out to nearly
> > > 1/2 an AU, so there are stars that do get faily
> > > close to that distance.
> > >
> > > Larry
> > >
> > > Quoting "E.P. Grondine" <epgrondine at yahoo.com>:
> > >
> > > > Hi Ron -
> > > >
> > > > When do we get back the tens of millions of
> > > dollars
> > > > spent looking for Nemesis? The NEO search
> teams
> > > could
> > > > really use it. There's those 64 fragments of
> SW3
> > > > coming back around in 2022. Additionally
> there's
> > > a
> > > > pack of nuts all gearing up to holler about
> 2012,
> > > very
> > > > close to SW3's 2011 return.
> > > >
> > > > If I can get the money back, can I keep a
> > > percentage?
> > > >
> > > > good hunting,
> > > > Ed
> > > >
> > > >
> > > >
> > > > --- Ron Baalke <baalke at zagami.jpl.nasa.gov>
> wrote:
> > > >
> > > > > >
> > > > > > Bigger than Pluto? At greater AUs'out?
> > > > > >
> > > > > > This could explain the comets that come
> out of
> > > the
> > > > > blue appear once and
> > > > > > never return.
> > > > > >
> > > > > > Did not astronomers think that it was
> > > interstellar
> > > > > perturbations that
> > > > > > "jarred" the K-belt?
> > > > > >
> > > > > > A large "planet(s)" out there would have
> much
> > > more
> > > > > effect than stars
> > > > > > light years away.
> > > > > >
> > > > >
> > > > > We would have seen evidence of a large
> planet by
> > > > > now, which we've haven't.
> > > > > Analysis by Myles Standish at JPL indicates
> that
> > > a
> > > > > large planet out
> > > > > beyond Neptune does not exist. Some
> astronomers
> > > > > have been searching
> > > > > for a Planet X based on what appeared to be
> > > > > irregularities
> > > > > in the orbits of Uranus and Neptune.
> However,
> > > when
> > > > > the extremely accurate
> > > > > measurements of the mass of Neptune made by
> the
> > > > > Voyager 2 flyby in 1989
> > > > > are inserted in the equations, these
> > > irregularities
> > > > > vanish. Prior to the
> > > > > Voyager 2 flyby, the mass number used for
> > > Neptune
> > > > > was off by five-tenths
> > > > > of 1 percent. When the new value for
> Neptune's
> > > > > mass is factored into the
> > > > > equations, the orbits of the outer planets
> are
> > > shown
> > > > > to be moving as exp
> > > > > ected, going all the way back to the early
> > > 1800's.
> > > > > The results of Standish's
> > > > > analysis are published in the May 1993 issue
> of
> > > The
> > > > > Astronomical Journal
> > > > >
> > > > > Ron Baalke
> > > > >
> ______________________________________________
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> > >
> >
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> > > > >
> > > >
> > > >
> > > >
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> > >
> > >
> > > --
> > > Dr. Larry A. Lebofsky
> > > Senior Research Scientist
> > > Co-editor, Meteorite "If
> you
> > > give a man a fish,
> > > Lunar and Planetary Laboratory you
> > > feed him for a day.
> > > 1541 East University If
> you
> > > teach a man to fish,
> > > University of Arizona you
> > > feed him for a lifetime."
> > > Tucson, AZ 85721-0063
>
> > > ~Chinese Proverb
> > > Phone: 520-621-6947
> > > FAX: 520-621-8364
> > > e-mail: lebofsky at lpl.arizona.edu
> > >
> >
> >
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>
> --
> Dr. Larry A. Lebofsky
> Senior Research Scientist
> Co-editor, Meteorite "If you
> give a man a fish,
> Lunar and Planetary Laboratory you
> feed him for a day.
> 1541 East University If you
> teach a man to fish,
> University of Arizona you
> feed him for a lifetime."
> Tucson, AZ 85721-0063
> ~Chinese Proverb
> Phone: 520-621-6947
> FAX: 520-621-8364
> e-mail: lebofsky at lpl.arizona.edu
>
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