ocr: HALLEY'S COMET HALLEYS COMET IS a short-period comet that takes about 76 years to orbit the Sun. When closest to the Sun, it lies between the orbits Tail ofMercury and Venus; when farthest, it lies beyond Neptune's orbit. It is the only comet whose nucleus has been photograpned. BIG HEAD Five spacecraft investigated the comet The coma, or. head, of in 1986 and one, Giotto, produced Halley's Comet is of: its nucleus. several hundred thousand ag good image kilometers across when dose tot the Sun; the tails are a. few Head million kilometers in length. SMALL POTATOES The. nuceus ofHalley's Comet ...
