Fig. 7: The core of the comet Hale-Bopp. One can see a kind of "shock wave" caused by evaporating gas on a rotating core. Combination of three pictures with eyepiece projection. — Minolta SRT-101, Vixen Refraktor d=90mm f=1000mm, 16+30+60s, Fujicolor Super G 400, Raten, 2. April 1997
