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Supernovae and the origin of cosmic rays

( —In the spring of the year 1006, one thousand and seven years ago this April, observers in China, Egypt, Iraq, Japan, Switzerland (and perhaps North America) reported seeing what might be the brightest stellar ...

dateApr 22, 2013 in Astronomy
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NASA supports Extreme Universe Space Observatory

The National Aeronautics and Space Administration has awarded $4.4 million to a collaboration of scientists at five U.S. universities and NASA's Marshall Space Flight Center to help build a telescope for deployment on the ...

dateMar 08, 2013 in Astronomy
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Solar variability and terrestrial climate

(—In the galactic scheme of things, the Sun is a remarkably constant star. While some stars exhibit dramatic pulsations, wildly yo-yoing in size and brightness, and sometimes even exploding, the luminosity of ...

dateJan 11, 2013 in Space Exploration
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