How the Gaia Spacecraft Will Reveal the True Nature of Our Galaxy

Our solar system is positioned near the center of the Milky Way, not far from the galactic core. It's a nice part of town, sure, but it doesn't allow for a very clear view of the rest of the galaxy. That's prevented us from studying many of the Milky Way's fundamental aspects, like whether it has two arms or four, how big it is, how fast it's moving, and whether we're someday going to ram headfirst into the Andromeda galaxy. More »

Source: http://feeds.gawker.com/~r/gizmodo/full/~3/7GrpsxVUhKI/how-the-gaia-spacecraft-will-reveal-the-true-nature-of-our-galaxy

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