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How many times does Halley's Comet appear in the sky in a century?
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Halley's Comet is one of the most famous comets, known for its appearance approximately every 76 years. This means it generally appears once per century, although the exact timing can vary slightly due to gravitational influences from planets that can alter its orbit. The comet's appearance has been recorded throughout history, with its most recent appearances in 1986 and expected again in 2061. Halley's Comet is an important celestial object for astronomers because it provides a predictable event that can be studied over long periods, offering insights into the composition and behavior of comets.