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They may be little, but they pack a big star-forming punch. Hubble astronomers have found that dwarf galaxies in the young universe were responsible for an "early wave" of star formation not long after the big bang. The galaxies churned out stars at a furiously fast rate, far above the "normal" star formation expected of galaxies. Understanding the link between a galaxy's mass and its star-forming activity helps to assemble a consistent picture of events in the early universe.
via HubbleSite NewsCenter -- Latest News Releases
http://hubblesite.org/newscenter/archive/releases/2014/25/
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