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Cassiopeia A: Supernova Remnant
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Cassiopeia A: Supernova Remnant


I have created an animation that blinks between this image and an older version I obtained from Kitt Peak National Observatory (courtesy of Doug Matthews and NOAO). Five years of time elapsed between the old image and the new version shown above. Although there are differences in the images due to how each was processed, the expansion of the nebula is readily visible by comparing features to foreground/background stars. Needless to say, the remnant of this supernova explosion continue to expand rapidly!

Picture Details:

  • Optics             24-inch RC Optical Systems Telescope
  • Camera           SBIG STL11000 CCD Camera
  • Filters              Custom Scientific
  • Dates               September 4th-5th, 2008
  • Location          Mount Lemmon SkyCenter
  • Exposure          LRGB = 240:90:90:90 minutes
  • Acquisition       TheSky (Software Bisque), Maxim DL/CCD (Cyanogen)
  • Processing        CCDStack (CCDWare), Mira (MiraMetrics), Maxim DL (Cyanogen), Photoshop CS3 (Adobe)
  • Credit Line and Copyright        Adam Block/Mount Lemmon SkyCenter/University of Arizona

Creative Commons License
The image found on this page (only) is licensed under a Creative Commons Attribution-ShareAlike 3.0 United States License.
Although larger versions of this image are available, they are NOT to be used without the expressed permission of Adam Block.