Appearing once every 75 to 76 years, Halley’s Comet the only naked-eye comet which can be viewed not once, but twice in a lifetime. According to a biography, in 1909 Mark Twain said, “I came in with Halley’s Comet in 1835. It is coming again next year, and I expect to go out with it.” Halley’s perihelion, the point in the comet’s orbit when it is closest to the Sun, occurred on April 20, 1910. Mark Twain passed away the following day.
This image includes a portrait of Mark Twain taken in his later years alongside one of the first photos ever taken of Halley’s Comet as seen during its 1910 apparition. Halley is next expected to appear in July of 2061. In the meantime, you can catch the Orionoid meteor shower, which is created from Halley’s fragments, each year in October.
Learn more about Hailey’s Comet in this episode of COSMOS: http://bit.ly/COSMOS-Ep3
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