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Large-scale cosmic structures

Juan_Pablo
Posts: 2,052
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11/20/2014 12:55:03 AM
Posted: 2 years ago
Does the fact that there are large-scale cosmic structures, like the arrangement of quasars and clusters of galaxies in cosmic webs, indicate that that is a large-scale repulsive force emanating from giant collections of matter? Recently, scientists have discovered that quasars, which are some of the earliest cosmic collections of matter in the universe, have their rotation axes aligned, even though they're separated by vast cosmic distances--up to billions of light years apart.

Is there a mysterious repulsive force being emitted by giant collections of matter?

Discuss.
RoyLatham
Posts: 4,488
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11/20/2014 10:57:34 AM
Posted: 2 years ago
The large scale structure of the universe is generally attributed to the origins of the universe in the Big Bang, when all the matter was nearly at a point. When the matter was so concentrated interactions were possible that formed the structure that is now evident. "Most cosmologists believe that the galaxies that we observe today grew from the gravitational pull of small fluctuations in the nearly-uniform density of the early universe." http://map.gsfc.nasa.gov... The theory is incomplete as to how the fluctuations originated. I've heard an explanation that quantum fluctuations upset absolute homogeneity at the very earliest stage.

There is much speculation on a repulsive force associated with dark energy, http://en.wikipedia.org... As far as I know, the dark energy force is claimed to be homogeneous and is used to explain why the universe is expanding faster than theory otherwise predicts. I haven't seen it applied to the structure of the universe.