Medeltida munk kan ha upptäckt Halleys komet först

Ny forskning tyder på att en engelsk munk identifierade Halleys komet som en återkommande besökare nästan sju århundraden innan Edmond Halley fick äran för upptäckten. Eilmer av Malmesbury ska ha insett att kometen som syntes 1066 var samma objekt som han hade observerat år 989.

Enligt berättelser som bevarats av 1100-talshistorikern William av Malmesbury förstod munken Eilmer, även känd som Aethelmaer, sambandet mellan de två uppenbarelserna. Professor Simon Portegies Zwart vid Leidens universitet och forskaren Lewis nådde denna slutsats efter att ha granskat de medeltida texterna på nytt. Deras resultat presenteras i boken Dorestad and Everything After. Ports, townscapes & travelers in Europe, 800-1100.

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