Comet Halley
by Royal Greenwich Observatory/science Photo Library
Title
Comet Halley
Artist
Royal Greenwich Observatory/science Photo Library
Medium
Photograph - Photograph
Description
Optical photograph of Halley's comet taken on the 6th January 1986 at Herstmonceux, East Sussex, England. Last sighting was in 1910. The comet, named after Edmund Halley who recognised its periodicity, has looped the sun every 76 years since first recorded appearance 240 B. C. It's structure comprises a nucleus of ice & dust, similar to a dirty snowball", & a tail. The latter is formed as the comet nears the Sun & is heated. Dust & gas are released, ionised by the Sun's UV radiation & swept into a tail by solar wind."
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September 16th, 2018
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