Image: Westerlund1 optical xray
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Westerlund1_optical_xray.jpg (792 × 373 pixels, file size: 218 KB, MIME type: image/jpeg)
Description: The starburst cluster Westerlund 1 at visible and X-ray wavelengths
Title: Westerlund1 optical xray
Credit: http://chandra.harvard.edu/photo/2005/wd1/
Author: NASA/CXC/UCLA/M.Muno et al.
Usage Terms: Public domain
License: PD
Attribution Required?: No
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