The image was obtained as part of Herschel's Hi-GAL key-project. This used the infrared space observatory's instruments to image the entire galactic plane in five different infrared wavelengths.
These wavelengths reveal cold material, most of it between -220º C and -260º C. None of it can be seen in ordinary optical wavelengths, but this infrared view shows astronomers a surprising amount of structure in the cloud's interior.
Image Credit: ESA/Herschel/PACS, SPIRE/Hi-GAL Project
Guillermo Gonzalo Sánchez Achutegui
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