November 30, 2013
On Thursday evening, at the time of its closest approach to the sun, comet ISON still had an active nucleus which was spewing gas and dust. About two hours after the Perihelion passage, however, there were no longer indications for any output. This is the assessment made by scientists at the Max Planck Institute for Solar System Research in Katlenburg- Lindau on Saturday. It is almost certain that ISON will not provide us with a spectacular comet show after all.