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Einstein's gravity theory passes toughest test yet

A newly-discovered system containing a pulsar and its white-dwarf companion has put gravitational theories to the most extreme test yet. The two objects orbit each other once every two and a half hours. In such a system, the orbits decay and gravitational waves are emitted,...

source: National Radio Astronomy Observatory
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Visiting Faculty Position - Amherst College Director of Mount Laguna Observatory (San Diego State University) Scientific Director -SESAME (Synchrotron-light for Experimental Science and Applications in the Middle East) Staff Scientist -SLAC National Accelerator...

source: NSBP

source: Copernicus Publications on behalf of the European Geosciences Union

The x-ray contrast between a cancerous lesion and surrounding normal tissue can be enhanced by using an exogenous contrast agent. Existing small-molecule agents used for contrast-enhanced digital mammography (CEDM), however, have limited tumor specificity and a short effective...

source: Medical Physics Web

Using a series of compressive shocks rather than a single shock, a team of researchers compressed iron up to 5.6 million atmospheres (5.6 million times the pressure at the Earth's surface), a record pressure for solid iron. Using multiple series of shocks keeps the entropy...

source: Lawrence Livermore National Laboratory

How long does it take to fall down a tunnel through the center of the Earth to the other side? A 1966 analysis published in the American Journal of Physics figured that it would take 42 minutes assuming a uniformly dense Earth. A paper recently posted on arXiv explores this...

source: Wolfram Research

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