How much dust exists in our galaxy? That question -- one of many -- may finally get answered by a galaxy survey at infrared wavelengths officially known as the Herschel infrared Galactic Plane Survey, or Hi-GAL.
March 28, 2013 11:33 AM PDT
Photo by: ESA/PACS & SPIRE Consortium, Sergio Molinari, Hi-GAL Project
| Caption by: Charles Cooper
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