Why Don't Galaxies Make As Many Stars As They Used To? Astronomers Explain
Tuesday, February 16, 2010 - 12:35
in Astronomy & Space
Scientists have known for more than a decade that galaxies in the early universe produced many more stars than galaxies today. But what has remained unknown is why. Now, researchers writing in a recent issue of Nature say they may have an explanation for this astronomical mystery. "[T]hree to five billion years after the Big Bang...galaxies churned out new stars at a much faster rate than they do now," said Michael Cooper, a postdoctoral Spitzer fellow at the University of Arizona's Steward Observatory. read more