Cosmological relativity theories

In summary, the conversation discusses the concept of time and its relation to the distance of galaxies. The participants debate about whether the big bang happened at the same time for all galaxies and a new theory called 'cosmological theory of relativity' is mentioned. The conversation also includes a link to a calculator that incorporates relativistic corrections and a discussion on a scientist named Carmeli and his papers. The progress of these theories over the past few years is also brought up.
  • #1
cosmoboy
65
0
If a galaxy is 1 billion light year far from us and if for us big bang
did happen 13 billion years ago then when it did happen for that galaxy ?

Pure guess will predict the answer 12 billion years, but what the observer on that galaxy will say about us ? will not he predict that we are close to big bang by one year ? just the opposite of what we predict here. Who is right ?

A new theory named 'cosmological theory of relativity' has been proposed.
read this here

http://www.arXiv.org/abs/astro-ph/0411180
http://www.arXiv.org/abs/astro-ph/0411181

Before saying that looking deep in space is identical to looking back in time make sure what time you are talking about.

cosmoboy
 
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  • #2
Try this link and play with the calculator
http://www.earth.uni.edu/~morgan/ajjar/Cosmology/cosmos.html
It incorporates relativistic corrections and illustrates why light emitted by now distant objects took so long to reach us. I am familiar with Carmeli's papers. He is a bit of a maverick. That is not a bad thing. His papers are interesting, just not yet well supported by observational evidence.
 
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  • #3
astro-ph/0411180 says that in Cosmological General Relativity (CGR), gravitation is described by a curved four-dimensional Riemannian spacevelocity. i never heard before the term spacevelocity, and is not defined in the paper. Probably is an idea of Carmeli coming from previous papers
 
  • #4
Has there been any progress with these theories over the past few years?
 

1. What is the difference between special and general relativity?

Special relativity describes the laws of physics in inertial frames of reference, while general relativity includes gravity and describes the laws of physics in all frames of reference.

2. How does general relativity explain the curvature of space-time?

According to general relativity, massive objects cause a curvature in space-time, which is perceived as the force of gravity. The more massive the object, the greater the curvature.

3. Can general relativity explain the expansion of the universe?

Yes, general relativity predicts that the universe is expanding due to the presence of dark energy, which causes the expansion to accelerate.

4. What is the role of cosmological constants in relativity theories?

Cosmological constants are used in general relativity to account for the expansion or contraction of the universe. They also play a role in determining the overall geometry of the universe.

5. Are there any experimental tests that support relativity theories?

Yes, there have been numerous experiments that have confirmed the predictions of special and general relativity, such as the bending of light around massive objects and the slowing of time near massive objects.

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