Click on the image for a full resolution version Messier 97, M97 or NGC 3587, is the faintest of the four planetaries in the Messier Catalogue. This nebula is located at 2,080 light-years in the constellation Ursa Major. Its structure differs from the usual planetaries, because instead of showing a “double cup” shape, it … Continue reading Messier 97. M97. NGC 3587. The Owl Nebula