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09/02/1986 Comet Halley reaches perihelion

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Halley's Comet - P1

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Clip from COSMOS - "Halley's Comet" | FOX Home Entertainment

Halley comet reached its closest approach to the sun, the perihelion. Comet Halley is the only known the short-period comet that is regularly visible to the naked eye from Earth, and the only naked-eye comet that might appear twice in a human lifetime. It has been observed and recorded since at least 240 BC.
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    • Essentials 

    • Pronunciation 

    • Computation of orbit 

    • Orbit and origin 

    • Structure and composition 

    • History