Triangulum Galaxy M33

It is a spiral galaxy located in the constellation of the Triangle and which belongs to the "local group" of which our galaxy is a part. It is the third most massive galaxy after that of Andromeda and ours (the Milky Way). However, it is slightly isolated and does not have a satellite galaxy like the others.

Presenting itself almost face-on with an inclination of only 9°, the galaxy of the Triangle allows to be observed down to its smallest details. Its isolation allows to see its very pure spiral structure since it is not deformed by gravitational interactions with other neighboring objects.

This object itself has a large number of nebulae, there are nearly 500, of which nearly fifty can be captured in astrophotography by focusing on the hydrogen layer. Some are gigantic with a size of the order of 1500 light years.

It is so bright that it can be seen with the naked eye on very dark nights. This same brightness is a challenge in processing because it creates a halo around it that is difficult to process.

The image presented is the combination of a first layer in color and a second with a filter intended to bring out the hydrogen and thus the nebulae (pink/red color). The halo was processed using different masks to separate the galaxy from the sky background.

Equipment used:
- Skywatcher 80ed Evostar
- ZWO 533mc pro
- ZWO 120mm mini
- EQM-35 Pro
- Asiair plus
- EFW
- EAF
- OAG
- Stacked with Siril and PixInsight
- Processed with PixInsight
- Finished with Lightroom