Which comet was last seen in 1986 and reappears about every 76 years?

a. Halley

b. Hale-Bopp

c. Hyakutake

d. Shoemaker-Levy 9

The correct answer for the question that is being presented above is this one: "a. Halley." The comet that was last seen in 1986 and reappears about every 76 years is the Halley's comet. Halley's Comet is arguably the most famous comet. It is a "periodic" comet and returns to Earth's vicinity about every 75 years