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Astronomers Release Most Complete Ultraviolet-Light Survey of Nearby Galaxies 5nvklj





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    Astronomers Release Most Complete Ultraviolet-Light Survey of Nearby Galaxies

    Dragon
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    Post by Dragon Thu May 17, 2018 10:28 pm

    "There has never before been a star cluster and a stellar catalog that included observations in ultraviolet light," explained survey leader Daniela Calzetti of the University of Massachusetts, Amherst. "Ultraviolet light is a major tracer of the youngest and hottest star populations, which astronomers need to derive the ages of stars and get a complete stellar history. The synergy of the two catalogs combined offers an unprecedented potential for understanding star formation."

    How stars form is still a vexing question in astronomy. "Much of the light we get from the universe comes from stars, and yet we still don't understand many aspects of how stars form," said team member Elena Sabbi of the Space Telescope Science Institute in Baltimore, Maryland. "This is even key to our existence — we know life wouldn't be here if we didn’t have a star around."

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    Astronomers Release Most Complete Ultraviolet-Light Survey of Nearby Galaxies 334pu7m
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    Post by Dragon Thu May 17, 2018 10:30 pm

    Astronomers Release Most Complete Ultraviolet-Light Survey of Nearby Galaxies Stsci-h-p1827a-m-2000x1198
    Credits: NASA/ESA/LEGUS team

    These six images represent the variety of star-forming regions in nearby galaxies. The galaxies are part of the Hubble Space Telescope's Legacy ExtraGalactic UV Survey (LEGUS), the sharpest, most comprehensive ultraviolet-light survey of star-forming galaxies in the nearby universe. The six images consist of two dwarf galaxies (UGC 5340 and UGCA 281) and four large spiral galaxies (NGC 3368, NGC 3627, NGC 6744, and NGC 4258). The images are a blend of ultraviolet light and visible light from Hubble's Wide Field Camera 3 and Advanced Camera for Surveys.

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    Astronomers Release Most Complete Ultraviolet-Light Survey of Nearby Galaxies 334pu7m
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    Post by Dragon Thu May 17, 2018 10:31 pm



    Astronomers at NASA's Goddard Space Flight Center in Greenbelt, Md., and the Pennsylvania State University in University Park, Pa., have used NASA's Swift satellite to create the most detailed surveys of the Large and Small Magellanic Clouds, the two closest major galaxies, in ultraviolet light.


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    Astronomers Release Most Complete Ultraviolet-Light Survey of Nearby Galaxies 334pu7m

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