Rujukan

WikiPedia: Komet Hale–Bopp http://www.cometography.com/lcomets/1995o1.html http://science.nationalgeographic.com/science/spac... http://www.nature.com/nature/journal/v380/n6570/ab... http://one.revver.com/watch/90657/flv/affiliate/14... http://www.sciam.com/article.cfm?id=the-trail-of-h... http://www.shadowandsubstance.com/Past%20graphics/... http://www.springerlink.com/content/h72381014307x6... http://www.springerlink.com/content/pr2756540kx944... http://www.time.com/time/magazine/article/0,9171,9... http://www.time.com/time/magazine/article/0,9171,9...