sci.astro.research Google Group

Fate of the outer planets as the Sun enters red giant phase

nx1...@hotmail.com — Wed, 08 Oct 2008 08:00:02 UT

On a number of documentaries (such as NG's "Naked Science" series)
and
in text books it discusses in some detail the fate of the inner
planets (Mercury, Venus, Earth and Mars) as the Sun enters the final
stages of its existence and swells into a red giant. What i'd like to
know is what will happen to the outer planets (Jupiter, Saturn,

test

jth...@astro.indiana-zebra.edu (Jonathan Thornburg [remove -animal to reply]) — Tue, 07 Oct 2008 20:43:00 UT

This is a test posting. Unless you're one of the s.a.r moderators,
you can ignore it.

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Re: Asymmetrical Cosmological Redshifts

e...@flesch.org (Eric Flesch) — Sat, 27 Sep 2008 08:15:32 UT

My point is that we are currently wedded to redshift as motion normal
to us (whether cosmological or dynamic). But generalization may yield
an alternative. As an example, wave-particle duality shows that light
has two natures, and if we test for the one aspect, the other aspect
disappears. Without observation, that duality wouldn't have occured

Re: Asymmetrical Cosmological Redshifts

hel...@astro.multiclothesvax.de (Phillip Helbig---remove CLOTHES to reply) — Fri, 26 Sep 2008 12:56:26 UT

In article <mt2.0-24378-1222424...@hercul es.herts.ac.uk>,
What, specifically, are you referring to?
[Mod. note: probably this
[link]
-- mjh]
Can you be more specific?
Actually, the cosmological redshift of an object tells us the ratio of
the scale factor of the universe now to that at the time the light was

Asymmetrical Cosmological Redshifts

e...@flesch.org (Eric Flesch) — Fri, 26 Sep 2008 10:15:08 UT

The latest story is that there is a mass movement of galaxies at the
farthest reaches of the universe. But all that is really clear is
that there are asymmetries in our universe-wide redshift measurements.
We call these asymmetries "mass movements" and "accelerating
expansion". Isn't it time that someone came up with a redshift model

"Stars Lie With Enormous Disk of Dark Matter"

xanth...@well.com (Kent Paul Dolan) — Mon, 22 Sep 2008 10:05:32 UT

Participants here may enjoy reading this rather
fluff level ScienceNOW article from Science
Magazine, suggesting that there has now been found a
more detailed structure of the sphere of dark matter
within which a galaxy is embedded:
[link]
FYI

[WWW] Illusory velocity

n...@charlesfrancis.wanadoo.co.uk (Oh No) — Sun, 21 Sep 2008 09:44:49 UT

The theory is done and I am finally into the section of the website
where I look at observational evidence. Two new pages
[link]
discusses the evidence for and against CDM and MOND, and compares to the
predictions of the teleconnection given in
[link]

Pioneer

n...@charlesfrancis.wanadoo.co.uk (Oh No) — Mon, 15 Sep 2008 08:02:09 UT

I have added a short discussion of the Pioneer blueshift, and the
calculation showing it is predicted by the teleconnection.
I recently found two papers containing essentially the same calculation
(referenced on the webpage)
[link]
Regards

Re: GRB 19 Mar 2008

dmpal...@email.com (David M. Palmer) — Sun, 14 Sep 2008 08:30:12 UT

In article <mt2.0-23276-1221033...@hercul es.herts.ac.uk>, Ken S. Tucker
Look at this week's Nature:
[link]
[link]
--=20
David M. Palmer dmpal...@email.com (formerly @clark.net, @ematic.com)

Re: supernova data

xxx...@yyyyyy.com (Bob Day) — Fri, 12 Sep 2008 13:58:03 UT

Oops. You're right. Bad example. Thanks for pointing that out!
-- Bob Day

Re: supernova data

xxx...@yyyyyy.com (Bob Day) — Thu, 11 Sep 2008 13:52:18 UT

For curve fitting, the ideal value of chi-square is 1 per degree of
freedom. Either too low or too high indicates that the model is
incorrect. For example, a polynomial of a high enough order can
be made to fit just about any data perfectly, yielding a chi-square
value of zero But that doesn't mean it's the correct curve!

Re: Will Sirius Supernova, and if so when?

e...@flesch.org (Eric Flesch) — Thu, 11 Sep 2008 07:32:01 UT

On Wed, 10 Sep 08 12:00:44 GMT, Oh No
You'd expect it would be over 100 million years, at which time Sirius
will be much further away than 9 light years.
Eric

Re: supernova data

hel...@astro.multiclothesvax.de (Phillip Helbig---remove CLOTHES to reply) — Wed, 10 Sep 2008 18:04:36 UT

In article <mt2.0-14516-1221054...@hercul es.herts.ac.uk>, "Bob Day"
This procedure is actually quite common. See the last part of
Sect. 15.1 of the second edition of NUMERICAL RECIPES IN FORTRAN, for
example, for a description.
If the errors were correctly estimated, then the chi-square should be 1

Re: supernova data

xxx...@yyyyyy.com (Bob Day) — Wed, 10 Sep 2008 16:43:50 UT

It seems to me that if I fit a straight line to some data that is
somewhat scattered about a sharply curved parabola and
normalized the chi-square of the straight line fit to 1 by adding
a constant to the denominator of the chi-square terms (as the
authors of some of the supernova cosmology studies appear