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Most of what we see in this photograph - - the spectacular whirlpool of spiral structure , the compressed filaments of gas and dust , the ionized nebulae , and the profusion of young stars - - all have been triggered by the collision of M51 with its smaller companion galaxy , NGC 5195 . " the spectacular city . It has already sent back the spectacular photograph of the planet Saturn seen to the right . So none of this is Monday morning quarterbacking , if anything it is Friday night / Saturday morning quarterbacking that was completely ignored and caused the spectacular defeat in the Sunday game . The few classroom sessions were very good and prepared us well for the spectacular field trips that made this elderhostel so exciting .