Adam Block took this image of comet ISON using a SBIG STX16803 CCD Camera with a 32-inch Schulman Telescope Schulman Telescope atop Mount Lemmon from the University of Arizona’s SkyCenter on the ... more 
Adam Block took this image of comet ISON using a SBIG STX16803 CCD Camera with a 32-inch Schulman Telescope Schulman Telescope atop Mount Lemmon from the University of Arizona’s SkyCenter on the morning of Oct. 8. less 
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SPACE.com | Photo By Adam Block/Mount Lemmon SkyCenter/University of Arizona
Sat, Oct 19, 2013 11:30 AM EDT