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What was the most beautiful comet of the second half of the twentieth century, with two tails visible to the naked eye?

Halley's comet

Comet McNaught

Comet Hale-Bopp

There was no such comet

Hale–Bopp was discovered on July 23, 1995 separately by Alan Hale and Thomas Bopp prior to it becoming naked-eye visible on Earth. Comet Hale-Boppit was visible to the naked eye for a record 18 months, twice as long as the previous record holder, the Great Comet of 1811. Accordingly, Hale–Bopp was dubbed the Great Comet of 1997.

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