image: This shows examples of images of two holes in space (left) and two dark clouds (right). The Spitzer images, showing warm dust and stars, are in blue, while the far-infrared light that Herschel sees, showing the much colder dust, is shown in gold. view more
Credit: Image credit: ESA/Herschel/SPIRE/Hi-GAL Consortium ; NASA/JPL-Caltech