Wednesday, June 28, 2006

Cosmic Variance


150,000 gross tons coming at you! The idea of a changing speed of light sometimes meets resistance. Fortunately a greater force stands behind GM=tc^3 than cowers behind its detractors. What happens when an irresistable force meets an immovable object? The object gets squashed!
Over at Cosmic Variance yesterday was a lively discussion on the "Preposterous Universe". I started by asking "It does appear preposterous. Why should anyone like it?" That led to some thankfully intelligent replies. Comment #20 shut everyone up:
If Earth is "defined" as the centre of the Universe, you can always make a choice of reference frames so that this remains so.
Just as anyone can observe retrograde motion of planets, the CMB indicates that the Universe expanded faster than the present value of c. One must infer a repulsive inflaton field (Epicycle #1). Supernova and other data indicate that relationship v/c is accelerating, so one must infer another repulsive dark energy (Epicycle #2). We would be fortunate to live in the centre of those forces.
Varying c indeed changes observations of galaxies at z=0.5, it affects their luminosity and redshift so that they fit the curve precisely. If a prediction fits the graph of many data points, what does it mean?

18 Comments:

Blogger QUASAR9 said...

PS - This debate still going on more than a week later with 128 comments

http://cosmicvariance.com/2006/06/19/the-string-theory-backlash/

10:53 AM  
Blogger QUASAR9 said...

PPS - This one started 3 days ago

http://golem.ph.utexas.edu/~distler/blog/archives/000855.html#comments

and, I noticed you started to visit Plato. He's put up some links to previous posts for you I think you'll like. All the best. Q

10:58 AM  
Blogger QUASAR9 said...

oops! broken link should read:

/archives/000855.html#comments

or just go to
http://golem.ph.utexas.edu/

11:01 AM  
Blogger L. Riofrio said...

Hi Q9! I wouldn't shut anyone down, though CV has not come up with a reply to Comment #20. Perhaps they are busy writing papers saying they thought of GM=tc^3.

11:32 AM  
Blogger L. Riofrio said...

Good comparison, Paul and Michael. It could also be the last view from the Andrea Doria. 1942 convoys sailed in zigzag formation; somebody zigged when they should have zagged. Keeping ships in formation is not easy even in a straight line, which makes the photo of the US fleet so remarkable. That was a tragedy that QM1 couldn't stop for survivors for fear of U-Boats.

4:03 PM  
Blogger Unknown said...

I had a friend who dove on the Andrea Doria for treasure. The ship was hit by the Stockholm, not the Queen Mary... and neither ship was in a convoy, nor was either ship zig-zaging to avoid u-boats.

Both ships simultaneously turned in the same direction in order to avoid the other, and this caused the collision.

Makes me wonder whether you have any clue at all what you're talking about, rio, so I'll reserve judgement on your "physics".

7:17 AM  
Blogger Unknown said...

I now see my error.

Sorry rio.

I'm still open to black holes in my head... ;)

Again, I apologize.

8:51 AM  
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Anonymous About Medicine Blog said...

Just as anyone can observe retrograde motion of planets.

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