AUSTIN, Texas---University of Michigan astronomers have detected the cool infrared signature of dust grains and silicates within superheated gas in the center of ancient elliptical galaxies 60 million light-years from Earth.
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University Of Michigan. "Cold Dust In Hot Gas Of Ancient Galaxies." ScienceDaily. ScienceDaily, 7 January 1999. <www.sciencedaily.com/releases/1999/01/990107074530.htm>.
University Of Michigan. (1999, January 7). Cold Dust In Hot Gas Of Ancient Galaxies. ScienceDaily. Retrieved April 19, 2014 from www.sciencedaily.com/releases/1999/01/990107074530.htm
University Of Michigan. "Cold Dust In Hot Gas Of Ancient Galaxies." ScienceDaily. www.sciencedaily.com/releases/1999/01/990107074530.htm (accessed April 19, 2014).