Feb 5 β€’ 05:00 UTC πŸ‡ͺπŸ‡ͺ Estonia Postimees

New study: English monk Eilmer noticed the periodicity of Halley's comet as early as the 11th century

A new study reveals that an 11th-century monk observed the famous comet that would later be named Halley's Comet, first as a child and then as an adult.

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