Nearby compact galaxies may shine light on early star formation
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