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[[Image:Halley1910a.jpg|right|thumb|400px|Halley's Comet on its 1910 appearance. This Yerkes Observatory photograph shows the comet much larger and brighter than it appeared to the naked eye.]]

[[Image:Halley1910a.jpg|right|thumb|400px|Halley's Comet on its 1910 appearance. This Yerkes Observatory photograph is highly enlarged; the comet would not have appeared this large or bright to the naked eye.]]

'''Halley's Comet''' (also known as Comet Halley and pronounced to rhyme with "valley") is a famous periodic comet which becomes visible to the naked eye when it approaches the Sun, about every 76 years. The last appearance was in 1986 and the next one will be in 2061.

'''Halley's Comet''' (also known as Comet Halley and pronounced to rhyme with "valley") is a famous periodic comet which becomes visible to the naked eye when it approaches the Sun, about every 76 years. The last appearance was in 1986 and the next one will be in 2061.