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| (Credit: NASA, ESA, and E. Hallman (University of Colorado, Boulder) |
Observations of the cosmic microwave background indicate that baryons (protons, neutrons, etc., - the ordinary matter just to understand) occupies only 5% of the total energy content of the Universe (95% is dark matter and dark energy). However in the local universe approximately half of this "ordinary" matter it has never been observed.
A group of astrophysicists
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to know more:
(http://arxiv.org/abs/1512.00454)
(http://www.nature.com/nature/journal/v528/n7580/full/nature16058.html)
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has experimentally verified that the missing mass (ordinary) does not fill the space homogeneously but it is concentrated in large-scale filamentary structures that make up the so-called cosmic web with temperatures between 10^5 to 10^7 degrees. This gas has been heated up by the cluster's gravitational pull and is now feeding its core. The filamentous structures intersect at the nodes creating a structure that visually recalls the network of neurons of the nervous system.
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