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Famous Comets

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Comet Hyakutake

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Orbital period: About 17,000 years, Last perihelion: March 25, 1996, Historical significance: Known for its close approach to Earth and bright blue-green ion tail.

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Comet Shoemaker-Levy 9

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Orbital period: Fragmented, Last perihelion: Disintegrated in July 1994, Historical significance: First comet observed to collide with a planet (Jupiter), providing valuable scientific data.

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Comet Lovejoy (C/2011 W3)

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Orbital period: Several thousand years, Last perihelion: December 16, 2011, Historical significance: Notable for surviving a close pass to the Sun and for being visible to the naked eye.

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Comet ISON (C/2012 S1)

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Orbital period: No longer exists, disintegrated, Last perihelion: November 28, 2013, Historical significance: Gained widespread media attention due to its extreme brightness predictions, but disintegrated during its solar approach.

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Comet Borrelly

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Orbital period: 6.86 years, Last perihelion: February 1, 2015, Historical significance: Subject of Deep Space 1 space probe flyby, providing significant data on comet surfaces and composition.

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Comet Hale-Bopp

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Orbital period: About 2,533 years, Last perihelion: April 1, 1997, Historical significance: One of the most widely observed comets of the 20th century, known for its great brightness.

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Comet Swift-Tuttle

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Orbital period: 133 years, Last perihelion: December 11, 1992, Historical significance: The parent body of the Perseid meteor shower.

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Comet Encke

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Orbital period: 3.3 years, Last perihelion: June 26, 2020, Historical significance: Second comet recognized as periodic after Halley's and with the shortest known orbital period of any comet.

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Halley's Comet

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Orbital period: 75-76 years, Last perihelion: February 9, 1986, Historical significance: First comet to be recognized as periodic, predicted by Edmond Halley.

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Comet Wild 2

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Orbital period: About 6.4 years, Last perihelion: February 2, 2021, Historical significance: Sampled by NASA's Stardust mission, revealing the presence of crystalline silicates which were unexpected in comets.

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