Green light for ISON: Comet blazes in stunning shots

It's not at all clear whether Comet ISON will become "the comet of the century," as skywatchers hoped a year ago, but it's certainly become a beautiful sight for photographers with the right kind of telescope. Adam Block captured a stunner on Tuesday morning, just before sunrise, using the 0.8-meter Schulman Telescope at the University of Arizona's SkyCenter atop Mount Lemmon.