Surprising Comet ISON . ... Credit Copyright: Babak Tafreshi ( TWAN ) Explanation: After failing to appear for Sun staring spacecraft at perihelion, its harrowing closest approach to the Sun, sungrazing Comet ISON was presumed lost. ... It follows the comet in view of the wide (blue tint) and narrow (red tint ) field cameras in the hours both before and after perihelion passage . ... A white circle indicates the Sun's positon and scale. ... NASA Web Site Statements, Warnings, and Disclaimers . ...