I've added a link and video to the post above
More interesting news:
Cosmic voids could contain as much as 20% of the 'normal' matter in the cosmos. Galaxies are located in filaments that make up a '
cosmic web'.
Illustris is a large computer simulation of the evolution and formation of galaxies, to measure the mass and volume of these filaments and the galaxies within them. It simulates a cube of space in the Universe, measuring some 350 million ly on each side.
When the astronomers looked at the data, they found that ~
50% of the total mass of the Universe is in the places where galaxies reside, compressed into a volume of 0.2% of the Universe we see, and a further
44% is in the enveloping filaments. Just
6% is located in the voids, which make up 80% of the volume. But they also found that a
surprising fraction of normal matter - 20% - is likely to be have been transported into the cosmic voids. The culprit appears to be the supermassive black holes found in the centers of galaxies.
This slab cut from the cube generated by the Illustris simulation shows the distribution of
normal matter.
The same slice of data, this time showing the distribution of
dark matter.
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More Distant Universe related news:
Astronomers have discovered a large area of diffuse emission [
radio halo], estimated to be ~ 3 million ly wide. The newly detected halo is located in a distant massive merging galaxy cluster designated
MACSJ2243.3-0935. The formation of radio halos is believed to be linked to the
merger of galaxy clusters, which are hugely energetic events - roughly equivalent to a
trillion supernovae explosions. One formation scenario suggests that turbulence in the gas of the galaxy cluster accelerates particles to radio-emitting energies leading to the production of radio halos.