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Halley’s Comet through the Ages!
https://armaghplanet.com/halleys-comet-through-the-ages.html
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solar system
giotto
isaac newton
aphelion
ras
comets and asteroids
dirty snowball
halley
royal astronomical society
edmund halley
comet halley
1p halley
principia mathematica
fred whipple
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Halley’s comet highlighted in Royal Astronomical Society meeting.