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Galaxies going green

Nearby compact galaxies may shine light on early star formation

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6:31pm, July 28, 2009

For galaxies, it’s not easy being green. Most of them appear blue or red from Earth.

Indeed, after combing through an online image bank of 1 million galaxies, volunteers for the Galaxy Zoo project have found a mere 250 galaxies with an unusual, greenish color. These compact bodies, dubbed the Green Peas, are only about one-tenth the size of the Milky Way.

Now, a team of astronomers working with the volunteers has discovered that the Green Peas are hamming it up, forming stars at an enormous rate — about 10 times faster than the Milky Way. Spectra of the galaxies taken by the Sloan Digital Sk

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