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2013-01-23 07:42:54

The ESA's Gaia satellite will measure the positions of a very large number of stars with unprecedented accuracy. The distances and motions of stars in the Milky Way will be determined with extraordinary precision, allowing astronomers to determine our Galaxy's 3-dimensional structure, space velocities of its constituent stars and, from these data, further our understanding of our Galaxy's origin and evolution.

Image uploaded by Robert Myles
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