Which part of the milky way does the image show? As a general question and more in specific regarding the image above: Which part of the milky way, planets, stars, clusters are included in the image?

How can I know which entities are included in different pictures?
I wholeheartedly recommend astrometry.net for this sort of thing. It Just Works(tm); running on your image produced this output with absolutely no hints or guidance from me:



For avoidance of doubt, I have no association with astrometry.net.