large-scale structure

large-scale structure

The structure of matter on the largest scales (greater than 100 megaparsecs), revealed by the results from large-scale redshift surveys of galaxies. This structure consists of very long filaments of matter surrounding huge voids or bubbles that are empty of matter. The largest superclusters are elongated, and scattered clusters of galaxies often link the ends of these superclusters into filaments. The filaments surround empty voids, the first of which was discovered in Boötes in 1981 and is about 100 Mpc across. Most of the matter in the Universe lies in the filaments, which occupy only 1% or 2% of the volume of space. The largest coherent structure so far detected in redshift surveys is the Great Wall at a distance of about 95 Mpc. This structure forms a thin sheet less than 10 Mpc thick but spans an area 80 by 225 Mpc.
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The result yields an age of 13.7 billion years since the Big Bang--perfectly consistent with estimates based on the recession velocities of galaxies and quasars, models of the evolution of large-scale structure, and the ages of the oldest stars.
Washington, Apr 11 ( ANI ): Researchers have shed light on how ancient sound waves sculpted the cosmos, thus revealing the most accurate measurements ever made of the large-scale structure of the universe between five to seven billion years ago.
"What such a survey adds to SDSS and 2dF is a picture of how large-scale structure has evolved over billions of years.
The discovery of more clusters would contribute to the researches on dark matter and large-scale structure of the universe, according to the statement.
Nearly a century later, general relativity still provides the underpinnings for almost everything we know--or think we know--about the universe's large-scale structure and evolution.
Computer simulations had shown that this hypothetical material could rapidly generate large-scale structure in the universe.
BOSS, a visible-light survey based at the Apache Point Observatory in New Mexico, has captured spectra of thousands of luminous galaxies and quasars to improve understanding of the large-scale structure of the universe.
Until recently, such maps have been too small and sparse to document the universe's large-scale structure. In 1997, however, an English-Australian team began a survey called 2dF (for two-degree field, the size of its key instrument's field of view).
The two approaches both indicate that gravity alone created the large-scale structure of the cosmos.

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