The Span of Andromeda
The full view of M31 (the Andromeda Galaxy) taken by HSC. The HSC mounted on the Subaru Telescope can observe an extremely wide field of view, equal to 9 times the area of the full moon. In some parts at the edge region appear to be strange color since the boundary area of the image circle is hard to process and observed area is not perfectly coinciding between the 3 bands.
Image: HSC Collaboration/Kavli IPMU [high-resolution]
Caption: Kavli Institute for the Physics and Mathematics of the Universe