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Testing Einstein's E=mc2 in outer space

UA physicist Andrei Lebed has stirred the physics community with an intriguing idea yet to be tested experimentally: The world's most iconic equation, Albert Einstein's E=mc2, may be correct or not depending on where you are in space.

Posted: Jan 9th, 2013

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Researchers try new approach for simulating supernovas

Two University of Texas at Arlington researchers want to bridge the gap between what is known about exploding stars and the remnants left behind thousands of years later. So they're trying something new - using SNSPH, a complex computer code developed at Los Alamos National Laboratory.

Posted: Jan 9th, 2013

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Simulated Mars mission reveals body's sodium rhythms

Researchers report that - in contrast to the prevailing dogma - sodium levels fluctuate rhythmically with 7-day and monthly cycles. The findings, which demonstrate that sodium is stored in the body, have implications for blood pressure control, hypertension and salt-associated cardiovascular risk.

Posted: Jan 8th, 2013

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Galaxy's gamma-ray flares erupted far from its black hole

In 2011, a months-long blast of energy launched by an enormous black hole almost 11 billion years ago swept past Earth. Using a combination of data from NASA's Fermi Gamma-ray Space Telescope and the National Science Foundation's Very Long Baseline Array (VLBA), the world's largest radio telescope, astronomers have zeroed in on the source of this ancient outburst.

Posted: Jan 8th, 2013

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Exocomets may be as common as exoplanets

The discovery by astronomers of six likely comets around distant stars suggests that comets - dubbed "exocomets" - are just as common in other stellar systems with planets.

Posted: Jan 7th, 2013

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At least one in six stars has an Earth-sized planet

A new analysis of Kepler data shows that about 17 percent of stars have an Earth-sized planet in an orbit closer than Mercury. Since the Milky Way has about 100 billion stars, there are at least 17 billion Earth-sized worlds out there.

Posted: Jan 7th, 2013

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Carbon in Vesta's craters

Large impacts of asteroids may have transferred carbonaceous material to the protoplanet and inner solar system.

Posted: Jan 7th, 2013

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Celestial flybys set to thrill

Astronomers are gearing up for thrills this year when Earth gets buzzed by two rogue asteroids and two comets, including a wanderer last seen by the forerunners of mankind.

Posted: Jan 6th, 2013

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Big Bang under the microscope

Scientists have replaced the telescope by the microscope: Using the similarities between the structure of a crystal and the state of the cosmos in the early universe, they have explored a yet unconfirmed phenomenon, the formation of cosmic strings. These so-called "topological defects" are believed to have formed as the universe expanded shortly after the Big Bang.

Posted: Jan 4th, 2013

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