A closeup of the "bubble nebula" (NGC 7635) in narrowband reveals a few cool features, one of which is a milky "plume" especially prominent in the SII channel. I have since replaced my duotone version of the bubble (linked here: www.flickr.com/photos/dmal/10637590174/) to better show the plume inside the bubble NGC 7635, also called the Bubble Nebula, Sharpless 162, or Caldwell 11, is a H II region emission nebula in the constellation Cassiopeia. The "bubble" is created by the stellar wind from a massive hot, 8.7 magnitude young central star. The nebula is near a giant molecular cloud which contains the expansion of the bubble nebula while itself being excited by the hot central star, causing it to glow [description lifted from wikipedia.org] Ha acquired on Oct 13 and 14, 2013 from my backyard SII acquired on Oct 30 and 31. OIII acquired in the first week of November 2013. Ha: 28 x 30m SII : 28 x 30m OIII: 30 x 30m Total exposure time: 43 hours Main Camera: QSI 583 WSG Guide Camera: SXV Lodestar (on OAG) Mount: Astro-Physics Mach 1 Scope: Celestron EdgeHD 8" (FL: 2032 mm) SXV Adaptive Optics Image Aquisition software MaximDL Registed, Calibrated and Stacked in MaximDL Post Processed with PixInsight 1.8 and Photoshop CS6