Digital Photograph of NGC 7635, the Bubble Nebula

	NGC 7635 The Bubble Nebula Photographs by Matthew T. Russell
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NGC Number: NGC 7635 Common Name: The Bubble Nebula Constellation: Cassiopeia Distance from Earth: ~7,100 Light Years	Click here to view a larger Standard Color (LRGB) image. Click here to view a larger Mapped Color (SII, HA, OIII) image. Click here to view a larger Hydrogen-Alpha image.	Location: Black Forest, CO Equipment: 16" RCOS Ritchey-Chretien Bisque Paramount ME SBIG STL-11000M AstroDon Series I LRGB Filters AstroDon Narrowband Filters Date Taken: 8/13/2008 - 9/25/2008 Exposure Specs (LRGB): 990 minutes total HA: 24x30 min LUM: 8x15 min RED: 5x10 min GREEN: 5x10 min BLUE: 5x10 min Exposure Specs (Mapped Color): 1,500 minutes total SII: 12x30 min HA: 24x30 min OIII: 14x30 min Exposure Specs (HA): 720 minutes total HA: 24x30 min Processed with: CCDAutoPilot CCDStack Adobe Photoshop CS2
Photograph Description The Bubble Nebula is actually the smallest of three bubbles surrounding massive star BD+602522, and part of gigantic bubble network S162 created with the help of other massive stars. As fast moving gas expands off of the central star, it pushes surrounding sparse gas into a shell. The energetic starlight then ionizes the shell, causing it to glow. Source: NASA

NGC 7635 The Bubble Nebula