A SIGNIFICATIVE FRACTION OF BARYONS RESIDE IN THE FILAMENTS OF THE COSMIC WEB

(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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Dark Neutron Stars

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A METHOD TO TEST THE EXISTENCE OF REGULAR BLACK HOLES

Illustration of a black hole. Image Credit & Copyright: Alain Riazuelo The existence of the singularity is an intrinsic problem of the General Relativity (GR). At the fundamentally level, the resolution of the problem of the singularity lies with the expectation that under situations where quantum effects become strong, the behavior of gravity could possibly greatly deviate from that predicted by the classical theory of GR. Regular black hole solution are proposed with the same spacetime geometry outside the horizon as the traditional black hole, but bears no singularity inside. Whether or not black hole singularities should exist, they would be covered by the black hole horizon. The black hole horizon serves as an information curtain hindering outside observers from directly observing the interior structure of the black hole, and determining that whether or not the black hole singularity does really exist. A method is needed to check the correctness of the new constructions ...

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