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Halley Comet returns to the inner solar system every 76 years

The famous periodic comet will next become visible from Earth in 2061

Halley's Comet orbits the Sun in a highly elliptical orbit, taking roughly 75 to 76 years to complete a single circuit. It is the only known short-period comet that is regularly visible to the naked eye from Earth, with recorded human sightings dating back to ancient Chinese and Greek chronicles.

Halleys Comet 01 10 1986 — Doug West · CC BY-SA 4.0 · licence · source

Where this comes from

ESA

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Tags: halley, comet, orbit

Halley Comet returns to the inner solar system every 76 years: the short answers

Where does this come from, and can I check it?: The famous periodic comet will next become visible from Earth in 2061. The figure is taken from ESA, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a space fact?: Yes. It sits on the Space shelf, one of 1,090 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.