Halley's comet does not circle the Earth, it orbits the Sun. It will enter the inner solar system again in mid-2061. (It passes through every 75-76 years.)
http://wiki.answers.com/Q/When_will_halley's_comet_circ...
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Haley's comet comes by earth every 76 years. It will come again in 2062. Can ChaCha assist you with anything else today?
http://www.chacha.com/question/when-will-haley's-comet-...
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This image of Comet Halley's nucleus was taken by the Giotto spacecraft during a flyby on March 13, 1986. Scientists estimate that about 10% of the surface was boiling off into space. The stuff that boiled off Halley in 1986 may one day be seen again during an Orionid meteor shower.
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science.nasa.gov/newhome/headlines/ast20oct98_1.htm
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"Earth comes close to the orbit of Halley's comet twice a year, once in May and again in October," explains Don Yeomans, manager of NASA's Near-Earth Object Program at the Jet Propulsion Laboratory.
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science.nasa.gov/headlines/y2001/ast17oct_1.htm
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Comet Halley is a fine example of a short-period comet, taking about 76 years to make one orbit around the Sun. At its closest point (perihelion), the comet is only 88 million kilometers from the Sun (about 60% of the Earth's distance from our star.) At its most distant point (aphelion), Halley is 5.2 billion...
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www.astrosociety.org/education/publications/tnl/01/01.h...
www.astrosociety.org/education/publications/tnl/01/01.html
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Halley's comet is named after Edmond G. Halley who was the first to suggest that comets were natural phenomena of the solar system, in orbit around the Sun. ... In 1682 he predicted the comet would return again in 1758, and sure enough, the comet arrived in March 1759. Halley's comet made a particularly bright appearance in 1910.
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www.windows.ucar.edu/tour/link=/comets/Halleys_comet.ht...
www.windows.ucar.edu/tour/link=/comets/Halleys_comet.html
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Edmund Halley ... Nothing is quite as exciting as a really bright comet. It may be seen for weeks, even during the day. Like a rocket flame, its tail may stretch halfway across the sky. Such a comet may come only once in a persons lifetime. Most, even at their brightest, ... Again, in 1682,
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www.shawnee.cc.il.us/craigb/ast111/papers/aimeewall/ind...
www.shawnee.cc.il.us/craigb/ast111/papers/aimeewall/index.htm
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I came in with Halley's Comet... It is coming again ... and I expect to go out with it... ... The comet rides in from the outer fringe of the solar system, makes a tight turn around the sun (inside the orbit of Mercury), and then sling-shots back out, far beyond Neptune. Halley predicted the comet's return in 1758, but he didn...
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www.uh.edu/engines/epi1642.htm
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