Astronomi

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Re: Astronomi

Innlegg QIQrrr 25 Mai 2011, 12:15

Monash University, May 23, 2011: A Monash student has made a breakthrough in the field of astrophysics, discovering what has until now been described as the Universe’s ‘missing mass’. Amelia Fraser-McKelvie, working within a team at the Monash School of Physics, conducted a targeted X-ray search for the matter and within just three months found it – or at least some of it - Monash student finds Universe’s missing mass

Børge Svanstrøm Amundsen

"Atlas was permitted the opinion that he was at liberty, if he wished, to drop the Earth and creep away; but this opinion was all that he was permitted" - Franz Kafka
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QIQrrr
 
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Re: Astronomi

Innlegg QIQrrr 27 Jun 2011, 01:26

New Scientist, June 21, 2011: Space is festooned with vast "hyperclusters" of galaxies, a new cosmic map suggests. It could mean that gravity or dark energy – or perhaps something completely unknown – is behaving very strangely indeed. We know that the universe was smooth just after its birth. Measurements of the cosmic microwave background radiation (CMB), the light emitted 370,000 years after the big bang, reveal only very slight variations in density from place to place. Gravity then took hold and amplified these variations into today's galaxies and galaxy clusters, which in turn are arranged into big strings and knots called superclusters, with relatively empty voids in between. On even larger scales, though, cosmological models say that the expansion of the universe should trump the clumping effect of gravity. That means there should be very little structure on scales larger than a few hundred million light years across. But the universe, it seems, did not get the memo. Shaun Thomas of University College London (UCL), and colleagues have found aggregations of galaxies stretching for more than 3 billion light years. The hyperclusters are not very sharply defined, with only a couple of per cent variation in density from place to place, but even that density contrast is twice what theory predicts. "This is a challenging result for the standard cosmological models," says Francesco Sylos Labini of the University of Rome, Italy, who was not involved in the work - Largest cosmic structures 'too big' for theories
Børge Svanstrøm Amundsen

"Atlas was permitted the opinion that he was at liberty, if he wished, to drop the Earth and creep away; but this opinion was all that he was permitted" - Franz Kafka
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Re: Astronomi

Innlegg Onarki 27 Jun 2011, 03:29

Legg merke til hvordan bildet av universet som vises i artikkelen ligner mistenkelig på plasmafilamentering. Dette er ikke akkurat noe som svekker teorien om det elektriske univers.

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Re: Astronomi

Innlegg QIQrrr 27 Jun 2011, 04:32

Onarki skrev:...bildet av universet som vises i artikkelen ligner mistenkelig på plasmafilamentering.

Strukturen kan minne om flere ting, uten at det av den grunn ... etc. Bildet er hentet fra The Millennium Simulation Project:

Børge Svanstrøm Amundsen

"Atlas was permitted the opinion that he was at liberty, if he wished, to drop the Earth and creep away; but this opinion was all that he was permitted" - Franz Kafka
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Re: Astronomi

Innlegg QIQrrr 04 Feb 2012, 11:15

United States Naval Research Laboratory, February 3, 2012: Scientists at the Naval Research Laboratory are part of an international team that has pooled their radio observations into a database, producing the highest precision map to date of the magnetic field within our own Milky Way galaxy. [...] In the near future astronomers are looking toward a new generation of radio telescopes, such as LOFAR, eVLA, ASKAP, MeerKAT and the SKA that will provide an abundance of measurements of the Faraday effect. With this new data, researchers will be able to provide updates to the image of the Faraday sky, and perhaps someday understand the origin of the galactic magnetic fields - Scientists Chart High-Precision Map of Milky Way's Magnetic Fields

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"Atlas was permitted the opinion that he was at liberty, if he wished, to drop the Earth and creep away; but this opinion was all that he was permitted" - Franz Kafka
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