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BookmarkComet Hale-Bopp was probably the most widely observed comet of the 20th century, and one of the brightest seen for many decades.
It was visible to the naked eye for a record 18 months, twice as long as the previous record holder, the Great Comet of 1811..
For more information about the topic Comet Hale-Bopp, read the full article at Wikipedia.org, or see the following related articles:
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