Nebula, Planetary NebulaCharles LilloApril 14, 2019Deep space imaging, narrowband, M97, Messier 97Comment Messier 97 - planetary nebula in the constellation Ursa Major Messier 97, a planetary nebula in the constellation Ursa Major. Nebula, Planetary NebulaCharles LilloApril 14, 2019Deep space imaging, narrowband, M97, Messier 97Comment