April 29, 2008 - ScienceDaily
A team of astronomers looking at the universe's distant past found nine young, unusually compact galaxies, each weighing in at 200 billion times the mass of the Sun. These young galaxies are the equivalent of a human baby that is 20 inches long, yet weighs 180 pounds.
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In 2006, the research team also studied the galaxies with the Gemini South Telescope Near-Infrared Spectrograph, on Cerro Pachon in the Chilean Andes. Those observations provided the galaxies' distances and showed that the stars are a half a billion to a billion years old, and that the most massive stars had already exploded as supernovae.
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