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    A Massive Galaxy long ago and Far away

    February 6, 2017, Categories  Astronomy/Space

    1. An extremely massive elliptical galaxy at about three billion years after the big bang, as seen in an optical/near-infrared image. The galaxy is about ten times more massive than the Milky Way. Today the galaxy is not actively producing new stars, but its population of old, red stars appears to be the result of earlier episodes during which the galaxy was one of the most active star-forming examples known. Credit: NASA/Hubble 2. Age and abundance patterns of COSMOS-11494 in comparison to lower-redshift quiescent galaxies.

    1. An extremely massive elliptical galaxy at about three billion years after the big bang, as seen in an optical/near-infrared image. The galaxy is about ten times more massive than the Milky Way. Today the galaxy is not actively producing new stars, but its population of old, red stars appears to be the result of earlier episodes during which the galaxy was one of the most active star-forming examples known. Credit: NASA/Hubble
    2. Age and abundance patterns of COSMOS-11494 in comparison to lower-redshift quiescent galaxies.

    Galaxies today fall roughly into 2 categories: elliptically-shaped collections of reddish, old stars that formed predominantly during a period early in the history of the universe, and spiral shaped objects dominated by blue, young stars...

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