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Symbiotic Stars

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Many, perhaps even most stars, are members of binaries -- two stars that orbit each other. Symbiotic stars are a small subset of binaries with an attitude: they display characteristic, d...

SDO Launches!

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The Atlas V roared to life Thursday morning, February 11, to send the Solar Dynamics Observatory into space on its mission to evaluate the complex mechanisms of the sun. Liftoff came on-t...

What Do Students Know?

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Black holes, frozen worlds, the "big bang," supernovae -- when it comes to telling strange and compelling stories, astronomy and space science educators can draw upon these and other deni...

X-Ray Emission from Young Stars

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The star TW Hydrae is located about 150 light-years from earth in the direction of the constellation of Hydrae, the Water Snake. This star is relatively young -- at about 10 million years...

Dr. Anna Frebel Wins Annie Jump Cannon Prize

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Dr. Anna Frebel of the Harvard-Smithsonian Center for Astrophysics has been awarded the 2010 Annie Jump Cannon prize of the American Astronomical Society for "outstanding research and pro...

The Cosmic Distance Scale

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In 1908, Harvard astronomer Henrietta Swan Leavitt discovered that a class of stars called Cepheids have brightnesses that vary regularly with periods that are directly related to their i...

Astronomers Find Rare Beast by New Means

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Cambridge, MA For the first time, astronomers have found a supernova explosion with properties similar to a gamma-ray burst, but without seeing any gamma rays from it. The discovery, usi...

Water Planets

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Of the roughly 420 extra-solar planets now known, about a dozen are in the newly named category of "super-earths," planets whose masses are in between of two and about fifteen earth-mass...
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