ISON's fizzle fits the comet mold

Comet ISON
In a composite image provided by NASA, Comet ISON neared the sun on Thursday, Nov. 28, 2013. The sun was imaged by NASA's Solar Dynamics Observatory, and an image from ESA/NASA's Solar and Heliospheric Observatory shows the solar atmosphere, the corona. Scientists are studying spacecraft images to find out whether a small part of ISON survived its close encounter with the sun.