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Halley's Comet

10/12/2020

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Introduction
Halley' Comet, also known as Comet Halley or 1P/Halley, is a comet in space that passes Earth around every 75 years. Halley's Comet was discovered in Prehistoric Times but its orbital period was discovered in 1758 by English Astronomer Edmond Halley, hence the name, Halley's Comet. Halley's  Comet has an orbital period of 75.32 Earth Years. Halley's Comet has a mass of 2.2 X 10^14 Kilograms, a mean diameter of 11 Kilograms, a mean density of 0.6 grams per centimetre cubed, an escape velocity of around 0.002 kilometres per second and a roational period of 2.2 Earth Days or 52.8 Earth Hours. The last passing of Halley's Comet around Earth was in 1986 and the next passing will be on July 8th 2061; so don't miss it!
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