42 2-minute lights plus calibration frames were stacked using DeepSkyStacker, photometric calibration with Siril, additional post-processing with Photoshop plus Astronomy Tools plugin.

I captured this widefield image of the Lagoon Nebula (Messier 8), Trifid Nebula (Messier 20), and Webb's Cross (Messier 21), all in the constellation Sagittarius, over 2 nights at York Redoubt just outside of Halifax. The Lagoon Nebula is an emission nebula and stellar nursery that is 4,000 to 6,000 light years from Earth. The nebula contains the open star cluster NGC 6530. The Trifid Nebula, which is 4,100 light years from Earth, is unusual in that it contains an open star cluster, an emission nebula, a reflection nebula and a dark nebula. Webb's Cross is a relatively young and tightly packed open cluster of stars that is about 3,900 light years from Earth.