Tiny Bubble (NGC7635 in Cassiopeia) in Widefield, Sep 2022
Williams Optics Redcat APO 51; - ASI2600MC;
Celestron CGEM II; IDAS NBZ Nebular Booster Filter;
82 x 600s exposures, Bin 1, Gain 100;
Total Integration Time = 13.6 hours;

Here is a widefield shot of the area centred by the Bubble Nebula (NGC7635) in Cassiopeia. While the bubble appears tiny in this image, it is actually 7 light years across. It is being "blown up" and lighted up by a central stars that is displacing material away from it. The material itself is largely hydrogen from the vast molecular cloud seen in this wider image within the Milky Way. Also shown in the cloud are various other patterns as blown about by photons and winds, together with two interesting star cluster that likely originated from the cloud itself.
The challenge of this image was the wide range of brightess offered up by the gases. It took careful stretching not to blow-out the bubble while leaving the dim nebulosity visible. Star brightness was tempered considerably to better view the nebulosity too, while still showing the clusters.