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Forget Planet X! New Technique Could Pinpoint Galaxy X


January 13, 2011

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Many galaxies have smaller satellites, but astronomers can't see them all because many are composed of dark matter. University of California, Berkeley, astronomers have developed a way to find dark satellite galaxies by analyzing the ripples in the hydrogen gas distribution in spiral galaxies. The technique allowed Sukanya Chakrabarti to predict the existence of a satellite of the Milky Way, which is obscured from view because it sits on the opposite side of the galaxy from Earth.Full Story

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University of California, Berkeley

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