Cosmology

Big Bang nucleosynthesis not the origin of lithium-6

HZDR’s Michael Anders at the LUNA accelerator in Gran Sasso, Italy. (Courtesy: HZDR/M Anders).   The only three elements created in the early universe, long before stars and galaxies began to form, were hydrogen, helium and lithium. According to Big Bang nucleosynthesis (BBN) theory, protons and neutrons combined to form these three elements just a …

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BICEP2 and the detection of Gravitational Waves

The most significant news of late is the BICEP2 results – if you are unfamiliar with the result, let me first summarize the results and then offer feedback and alternative viewpoints. BICEP2 was the second generation BICEP (Background Imaging of Cosmic Extragalactic Polarization) instrument for astronomy located at Earth’s south pole. Possessing a greatly improved …

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Cosmologist claims Universe may not be expanding

Christof Wetterich, a theoretical physicist at the University of Heidelberg in Germany, posted a paper on the arXiv preprint server, that offers a different cosmology in which the Universe is not expanding but the mass of everything has been increasing over time. Although the paper has yet to be peer-reviewed, none of the experts contacted …

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Hubble Finds the Oldest Star (as of March 2013)

This is a Digitized Sky Survey image of the oldest star with a well-determined age in our galaxy. The aging star, cataloged as HD 140283, lies 190.1 light-years away. The Anglo-Australian Observatory (AAO) UK Schmidt telescope photographed the star in blue light. Credit: Digitized Sky Survey (DSS), STScI/AURA, Palomar/Caltech, and UKSTU/AAO A team of astronomers using NASA’s …

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Is the universe expanding asymmetrically?

Monday, 26 September 2011 by Estelle Asmodelle Cosmos Online This image shows the two hemispheres of a spherical mapping of the cosmic microwave background. New research examining the velocities of Type Ia supernovae suggests faster expansion in the northern hemisphere of the universe, challenging the cosmological principle that the universe is expanding uniformly in all …

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