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The Whale Galaxy is an edge-on spiral galaxy in Canes Venatici,is also known as " or as the "Herring Galaxy" or NGC4631 and is about 30 Million light years distant.The image is taken in the in prime focus of professional mirror telescope (newtonian) the Exposure time is 150 minutes.
This is a very deep and real image, so the "noise" in background is no noise, these are very very dim stars again.The image is not overprocessed and sharp.The image processing is made according to scientific rules for long exposed astronomical pictures.