ocr: 1COMETI HALLEY The periodic return of comets was proved by Halley's 1759 appearance: ah tUBEite vae oiNnin 2.COMET BENNETT Al bright tail made Ben- nott a spectacular pre- dawn view in 1970. 3. COMET WEST The brilliant head could' 5 be seen even: during day: light hours in 1976. D TTUTENVE COMET KOHOUTEK: Hardly visibles to ama: teurs in 1973-74, it hadi a long, blue ion tail MCANE HRIOS L - aRe : 5. COMET KEYA-SEKI Nearly grazing the suna Ikeya-Seki barely survived a 19651 visit. STEVL LANDON
