March 11, 2018January 27, 2024 Mario Motta, MDAstro Images, Astronomy, NGC 3001-8000 NGC 4001-8000 Remainder of NGC catalog
March 1, 2018January 27, 2024 Mario Motta, MDAstro Images, Astronomy, NGC 3001-8000, Sharpless Catalog SH2 Sharpless catalog (Hydrogen alpha regions of Milky Way) SH2 Images, PN images
