- #1
Sparky_
- 227
- 5
Hole found in universe?
http://www.space.com/scienceastronomy/070823_huge_hole.html
for your enjoyment -
Sparky_
http://www.space.com/scienceastronomy/070823_huge_hole.html
for your enjoyment -
Sparky_
LURCH said:Nevrmind; calculated it myself. Southern Local Supervoid; 158Mpc. 1 pc=3.26 ly. 158mpc=474,000,000 ly. The newly-found void is about twice the size of the SLS.
Is that right?
How likely is such a large underdense region in a concordance cosmology? Suppose there is only one such large underdense region in the whole volume up to z=1. The corresponding void frequency is then the ratio of the comoving volume of the void to the comoving volume of the Universe to z=1, which is roughly 3 × 10−5. Is this consistent with LCDM? Void statistics have been done for a number of optical galaxy surveys, as well as numerical structure formation simulations. Taking the most optimistic void statistics (filled dots in Fig. 9 of Hoyle & Vogeley, 2004) which can be approximated by log P = −(r/Mpc)/15, a 140 Mpc void would occur with a probability of 5 × 10−10, considerably more rare than our estimate for our Universe (3×10−5) based on the existence of the cold spot. One must keep in mind, however, that observational and numerical void probability studies are limited to rc 30 Mpc; it is not yet clear how these should be extrapolated to rc > 100 Mpc.
Voids this large currently seem improbable in the concordance cosmology,...
Does the "cold spot" relate in any way (like in its geometry) to the previously discovered "warm spot" other than their size, and magnitude of deviation from mean CMB temperature? Can we tell if it or its surroundings are accelerating in expansion? What might be at the center of this void?Astrnomers, have found a great cosmic nothingness which as I understood from the link below is considered as an evidence of dark energy.
http://news.bbc.co.uk/2/hi/science/nature/6962185.stm
A "gaping hole" in the universe refers to a region of the universe that has significantly fewer galaxies, stars, or other celestial bodies compared to its surroundings. This can also be known as a cosmic void.
The size of the discovered gaping hole in the universe can vary greatly. Some holes can be as small as a few million light-years across, while others can span over a billion light-years in diameter.
The exact cause of a gaping hole in the universe is still unknown, but it is believed to be a result of the expansion of the universe. As the universe expands, regions with less matter become more spread out, creating voids.
No, there are no known dangers posed by a gaping hole in the universe. These voids are simply areas with fewer galaxies and stars, and they do not affect the overall structure or stability of the universe.
Scientists use a variety of tools and techniques to detect and study gaping holes in the universe, including telescopes, surveys, and computer simulations. They look for regions with fewer galaxies and use data on the motions of galaxies to map out the structure of the universe and identify voids.