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This week in pictures: October 20–26, 2012

In the past seven days, VISTA scientists released the largest-ever catalog of the Milky Way's central stars, NASA's NuSTAR captured its first X-ray view of the Milky Way's black hole during the middle of a flare-up, astronomers uncovered a surprising trend in galaxy evolution, and more.

NASA/ESA/M. Postman (STScI)/T. Lauer (NOAO)/the CLASH team

Monster galaxy may have been stirred up by black-hole mischief

Astronomers have found an elliptical galaxy that may have been puffed up by the actions of one or more black holes in its core. Learn more »
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