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The week in pictures: September 10–16, 2011

This week's news featured a large exoplanet haul, the launch of a lunar mission, a Tatooine-like planetary system discovered, and more.
ESA/NASA/E. Olszewski (University of Arizona)

How single stars lost their companions

The density of a stellar birth environment decides whether a star holds onto its companion or not. Learn more »

"The week in pictures" highlights the amazing discoveries and cutting-edge research that resulted in magnificent photos and illustrations in the past week's Astronomy.com News section. Scroll through the photos, comment on your favorites, and click links to learn more about the science behind the pictures. We hope "The week in pictures” will not only highlight all our beautiful universe has to offer but also summarize the important stories of the past seven days in case you missed anything.

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