God's Existence Explains the Universe 3.
So if the matter that originally emitted the oldest CMBR photons has a present distance of 46 billion light-years, then at the time of decoupling when the photons were originally emitted, the distance would have been only about 42 million light-years.
Misconceptions on its size[ edit ] An example of the misconception that the radius of the observable universe is 13 billion light-years.
Many secondary sources have reported a wide variety of incorrect figures for the size of the visible universe. Some of these figures are listed below, with brief descriptions of possible reasons for misconceptions about them.
While it is commonly understood that nothing can accelerate to velocities equal to or greater than that of light, it is a common misconception that the radius of the observable universe must therefore amount to only This reasoning would only make sense if the flat, static Minkowski spacetime conception under special relativity were correct.
In the real universe, spacetime is curved in a way that corresponds to the expansion of spaceas evidenced by Hubble's law. Distances obtained as the speed of light multiplied by a cosmological time interval have no direct physical significance. If the whole universe is smaller than this sphere, then light has had time to circumnavigate it since the Big Bang, producing multiple images of distant points in the CMBR, which would show up as patterns of repeating circles.
A preprint by most of the same authors as the Cornish et al. This figure was very widely reported. The organization of structure appears to follow as a hierarchical model with organization up to the scale of superclusters and filaments.
Larger than this at scales between 30 and megaparsecs there seems to be no continued structure, a phenomenon that has been referred to as the End of Greatness.
Stars are organized into galaxieswhich in turn form galaxy groupsgalaxy clusterssuperclusterssheets, walls and filamentswhich are separated by immense voidscreating a vast foam-like structure  sometimes called the "cosmic web".
Prior toit was commonly assumed that virialized galaxy clusters were the largest structures in existence, and that they were distributed more or less uniformly throughout the universe in every direction.
However, since the early s, more and more structures have been discovered. The discovery was the first identification of a large-scale structure, and has expanded the information about the known grouping of matter in the universe. It is about 1 billion light-years across. That same year, an unusually large region with a much lower than average distribution of galaxies was discovered, the Giant Voidwhich measures 1.
Based on redshift survey data, in Margaret Geller and John Huchra discovered the " Great Wall ",  a sheet of galaxies more than million light-years long and million light-years wide, but only 15 million light-years thick.
The existence of this structure escaped notice for so long because it requires locating the position of galaxies in three dimensions, which involves combining location information about the galaxies with distance information from redshifts.
Two years later, astronomers Roger G. Clowes and Luis E. Campusano discovered the Clowes—Campusano LQGa large quasar group measuring two billion light-years at its widest point which was the largest known structure in the universe at the time of its announcement.
In Aprilanother large-scale structure was discovered, the Sloan Great Wall.
In Augusta possible supervoid was detected in the constellation Eridanus. This supervoid could cause the cold spot, but to do so it would have to be improbably big, possibly a billion light-years across, almost as big as the Giant Void mentioned above.Argumentative Essay Topics From Team At Essay Basics Click To See Examples Of Argumentative Writing.
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There are many theories about this issue. I will briefly summarize a few of them, and then give whatever evidence is available for or against each. There are many theories regarding the creation of the universe, for example, there is an ancient Egyptian legend that says that Osiris Khepera created himself.
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