Labels:text | screenshot OCR: HALLEY'S COMET HALLEY'S 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 of Mercury and Venus; when farthest, it lies Tail beyond Neptune's orbit. It is the only comet whose nucleus has been photographed. Five spacecraft investigated the comet BIG HEAD The coma, or head, of in 1986 and one, Giotto, produced Halley's Comet is a good image of its nucleus. several hundred thousand kilometers across when close to the Sun; the tails are a few Head million kilometers in length. SMALL POTATOES The nucleus of Halley's Comet is a dark, potato-shaped object measuring 16 by 8 km (10 by 5 miles). HALLEY'S HISTORY
