In INDIA most of the people are superstitious , even the educated ones are not free from this. they have an inherent believed in the corelations between things displayed in the skies . especially with comets , whenever there is a comet in sight most people would perform Shantiyagna which is supposed to ward off evil spirits it carries . Most scientist would rediculed at this seremony . But no matter what we should not just laugh at it , it should be thought over very deeply.