Halley's Comet

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A photograph of all of Halley's Comet during its pass through the inner Solar System in 1986, including the comet's coma and its head.

Halley's Comet, also known as 1P/Halley[1], is a short-period comet visible from Earth every 74 to 79 years.[2] It is believed to be the only comet that can appear around twice in a human lifetime[3]. The last pass of Halley's Comet was in 1986 and will re-appear in 2061.[4]