Image: Einstein's theory fights off challengers
Image Credit: X-ray (NASA/CXC/SAO/A. Vikhlinin; ROSAT), Optical (DSS), Radio (NSF/NRAO/VLA/IUCAA/J.Bagchi)
(PhysOrg.com) -- Two new studies have put Einstein's General Theory of Relativity to the test like never before, using observations of galaxy clusters to study the properties of gravity on cosmic scales.
These results, made using data from NASA's Chandra X-ray Observatory, show Einstein's theory is still the best game in town. Such studies are crucial for understanding the evolution of the universe, both in the past and the future, and for probing the nature of dark energy, one of the biggest mysteries in science.
This composite image of the Abell 3376 galaxy cluster shows X-ray data from the Chandra X-ray Observatory and the ROSAT telescope in gold, an optical image from the Digitized Sky Survey in red, green and blue, and a radio image from the VLA in blue. The bullet-like appearance of the X-ray data is caused by a merger, as material flows into the galaxy cluster from the right side. The giant radio arcs on the left side of the image may be caused by shock waves generated by this merger.
Chandra observations of galaxy clusters have previously been used to show that dark energy has stifled the growth of these massive structures over the last 5 billion years and to provide independent evidence for the existence of dark energy by offering a different way to measure cosmic distances.
Provided by
JPL/NASA
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The universe expands as the volume of particles increases by a factor of ~10^23 when neutrons from the compact solar core become interstellar hydrogen in the process that powers the Sun and sustains life.
Nuclear rest mass data and space-age data from measurements of solar neutrinos and variations in the abundances of chemical elements and their isotopes in meteorites, planets, the Moon and solar emissions over the past four decades show that solar luminosity, solar neutrinos and the solar wind arise from a series of four reactions, triggered by neutron repulsion in the solar core (http://arxiv.org/...1499v1):
1. Neutron-emission from the solar core
2. Neutron-decay to hydrogen
3. Partial fusion of hydrogen into helium
4. Discharge of solar wind H and He with traces of mass-fractionated heavier elements from the Suns iron-rich mantle. - OK Manuel
Mar 24, 2011
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We are slightly angled in relation to the jet's radiation. It causes us to see the jet's radiation away from the galaxy in the direction we see it happen.
It is a logical consequence of that we are almost 90 degree angle above the galactic plane.
There is nothing odious about the displayed image.
Mar 24, 2011
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Mar 24, 2011
Rank: 5 / 5 (4)
What does your hypothesis of a possible stellar fuel cycle have to do with testing Einstein's theory of gravity by tracking matter moving towards a galactic cluster?
Mar 24, 2011
Rank: 5 / 5 (2)
On to Abell 3376, the use of dark energy to explain the stifling of galaxy cluster development is important to provide independent confirmation of its effects from redshift data. Curious to see if Moffat's MOG also requires DE to explain Abell 3376.
Mar 25, 2011
Rank: 5 / 5 (2)
Moreover, I can't see any green or red colors in the image. Maybe my eyes are to blame. And that blue is used for the optical as well as for the radio image is not very helpful, either.
And what kind of tests has GR been put to?
What "different way to measure cosmic distances" is referred to?
How can one _show_ that DE has stifled any growth when the existence of DE is just an implication of an assumed observation (of accelerated expansion)?
It's an unsatisfactory article.