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Origins of the Milky Way

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According to current astronomical models, the Milky Way and other large galaxies formed over billions of years in a process that involved interactions between smaller galaxies, and in par...

Martian Weather

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The Mars Global Surveyor (MGS) is a NASA mission that arrived at Mars in September, 1997, and for nine years circled the planet every two hours in a polar orbit (that is, traveling from t...

At 1,500,000 mph, Twin Stars Win Speediest Orbit Award

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(Written by Christine Pulliam, Smithsonian Astrophysical Observatory, for Science at the Smithsonian, a website featuring highlights of scientific research at the Smithsonian Institution....

Simulating the Birth of Massive Stars

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Astronomers have made great strides recently in understanding how modest stars -- those like the sun or smaller -- are formed. Stars form from giant clouds of gas and dust in space as...

First of Missing Primitive Stars Discovered

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Cambridge, MA Astronomers have discovered a relic from the early universe - a star that may have been among the second generation of stars to form after the Big Bang. Located in the dwar...

A New Class of Variable Stars Revealed

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Modern astronomy sometimes makes discoveries by looking in new places, the distant universe for example, using telescopes and instruments that extend the previous limits of detection. Bu...

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...
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