The largest high-resolution and contiguous map of dark matter in the universe has been unveiled by the DEC . The researchers who created the map say that it demonstrates the potential for a technique based on weak gravitational lensing to be used for studying dark matter and dark energy. Called "cosmic shear", the technique is now being used to regenerate a full-sized 3 D map, which should be completed in 2020.Dark matter is an invisible entity that appears to interact only through gravity. Physicists believe it accounts for four-fifths of the matter in the universe and, while they have some ideas as to what it could be made of, it has never been detected directly.
Dark energy is even more elusive. It is the general label for the unexplained observation that the expansion of the universe is accelerating. This is contrary to the basic prediction of Einstein's general theory of relativity, which suggests that gravity should be slowing the expansion down.
This is the first map produced by the Dark Energy Survey that shows dark matter across a large area of sky. The density of dark matter in the blue regions corresponds with the average density of the cosmos. The yellow and red regions have greater than average dark-matter densities. The right ascension (RA) and declination (DEC) are given in degrees. (Courtesy: Dark Energy Survey)
The Debate continues. Are these signature of dark matter the cause of inflation or is it the product of other cosmoses gravitational influence on ours. This is where young Physicists will spend their future thoughts and hopefully solutions to interpretation of models such as the one above.
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