text:  Tonight could be the best chance to view a comet that rarely passes by Earth, as Fox's Eben Brown reports. Children of the 1980s might remember the big celebration in anticipation of Halley's Comet, which was visible to Earth-bound humans in 1986. Now tonight, another comet named for German astronomer Heinrich Olbers will be visible. Olbers is listed as a Halley-like comet, though its orbit is slightly faster and therefore makes more frequent appearances, as in once every 69 years.