Herschel-SPIRE Dark Field

The final SPIRE Dark Field image map created by combining the Blue (250 micrometres), Green (350 micrometres) and Red (500 micrometres) SPIRE camera channels together, each channel stacking a total of 141 individual images on top of each other. The blobs on the image are all individual galaxies or groups of galaxies. However, the image is so crowded that there is almost no empty space with the faintest galaxies merging into the background light in the map.