Re: BREAKING NEWS: The Galaxy's newest satellite

Joseph Lazio <jlazio@xxxxxxxxxxxxxxxxx> wrote in message news:<llbr8wvyix.fsf@xxxxxxxxxxxxxxxxx>...
> Jim Greenfield wrote:
> > Jonathan Silverlight <jsilverlight@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
> > wrote in message news:<bi4WbdMYiHTCFwae@xxxxxxxxxxxxxxxxxxx>...
> >
> >> In message <llll83a8e8.fsf@xxxxxxxxxxxxxxxxx>, Joseph Lazio
> >> <jlazio@xxxxxxxxxxxxxxxxx> writes
>
> >>>> Astronomers spot the faintest galaxy ever seen--orbiting the
> >>>> Milky Way.
>
> >>> Here's the abstract from the discovery paper,
> >>> <URL:http://xxx.lanl.gov/abs/astro-ph/0503552>:
>
> >> I get a rough figure of +18, spread over a field
> >> about 1/4 degree across. I have no idea why my post triggered an
> >> argument about the Big Bang!
>
> > Sorry :-( Just me pointing out once again, glaring contradictions
> > in BBT and observation.
>
> Actually, this observation actually supports some cold dark matter
> models. There's been an on-going discrepancy between what various
> models for structure formation predict and what is observed: Various
> computer simulations of galaxy formation predict that a large galaxy
> like the Milky Way should have many more satellite galaxies than are
> observed. This discovery helps reduce, but only slightly, the
> discrepancy.

Perhaps I am inadvertantly a "supporter" of 'dark matter', if, as I
suggest, photons lose their kinetic energy by gravitational
retardation of their motion after emission, or through interaction
with other entities. This opens the possibility (make that
probability) that the same (infinite) amount of mass / energy has
ALWAYS been, and that galaxies form, evolve, and decay eternally.
Thus galaxies of all ages exist in a roughly homogenous universe, and
it looks like their life expectancy is about 10 - 12 Ga, IFf current
aging criteria are correct.

For the education of BF: The MW revolves about 1/200m years. If it is
10Ga, now you see how only 50 revs have occurred. I find it highly
unlikely that it has achieved its degree of diversity and
sophistication given that scenario. Either the aging criteria or the
observations which lead to the 200 m are likely flawed. How did the
orbiting galaxy form and obtain an orbit around mW in such a "short"
time??
As for the distant "young" galaxies, do you think that they have
performed only 5 revs?

Jim G
c'=c+v
.

Relevant Pages

  • New analysis puts dark matter back into elliptical galaxies (Forwarded)
    ... This theory faced a challenge in 2003, when a team of astronomers reported a surprising absence of dark matter in elliptical galaxies. ... But a new analysis published in the September 29 issue of the journal Nature provides an explanation for the earlier observations that fits comfortably with the standard theory and puts the dark matter back into elliptical galaxies. ... "A dearth of dark matter in elliptical galaxies is especially puzzling in the context of the standard theory of galaxy formation, which assumes that ellipticals originate from mergers of disk galaxies," added Avishai Dekel, professor of physics at the Hebrew University of Jerusalem and first author of the Nature paper. ... Whereas spiral galaxies are dominated by flattened, rotating disks of stars and gas, elliptical galaxies are round, smooth collections of stars. ...
    (sci.astro)
  • Scientists elucidate the origin of the darkest galaxies in the universe (Forwarded)
    ... Scientists elucidate the origin of the darkest galaxies in the universe ... Ghostly galaxies composed almost entirely of dark matter speckle the ... Now, Stelios Kazantzidis, a researcher at Stanford University's Kavli ... Using supercomputers to create novel simulations of galaxy formation, ...
    (sci.astro)
  • Chandras Find of Lonely Halo Raises Questions About Dark Matter (Forwarded)
    ... Dark matter continues to confound astronomers, ... Observatory demonstrated with the detection of an extensive envelope of dark ... raises questions about how galaxies acquire and keep such dark matter halos. ... The observed galaxy, known as NGC 4555, is unusual in that it is a fairly large, ...
    (sci.astro)
  • Re: Black Holes have a size limit and Gravity has a Velocity
    ... If black holes could get bigger, then there would be a bigger galaxy. ... if a black hole can cave in on it self and gravity cannot escape ... Galaxies without a center/Halo Galaxies. ... galactic disk dark matter grows. ...
    (sci.astro)
  • The Gravitational Instability Theory on the Formation of the Universe
    ... Science knows the formation of matter in our universe was caused by ... RUFUS'S GALAXY WEB PAGE ... Basic Operation of Galaxies ...
    (sci.space.policy)
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