Did a medieval flying monk spot Halley's comet, twice? It's complicated

A historian from the University of Leicester has proposed that Eilmer of Malmesbury, a medieval monk known for his pioneering flight attempts, may have observed two distinct comets during his lifetime. According to the research, Eilmer could have seen one comet in 1018 and another in 1066, which has led to intriguing discussions about historical astronomical events.

Eilmer, who attempted to fly using a glider, documented his experiences in a way that has captured the interest of historians and astronomers alike. His accounts, while not detailed by modern standards, provide a unique glimpse into the celestial observations of the time. The suggestion that he witnessed two comets adds complexity to our understanding of medieval astronomy and the cultural significance of such events in that era.

The proposed sightings coincide with significant historical moments in England, particularly the latter date, which is famously associated with the Norman Conquest. This connection raises questions about how astronomical events may have influenced historical narratives and public perception during the Middle Ages.

The research highlights the importance of historical records in understanding our past and the ways in which early astronomers interpreted the cosmos. As scholars continue to investigate Eilmer's life and observations, the findings may reshape our understanding of medieval science and its impact on society.

Source: arstechnica.com – https://arstechnica.com/science/2026/06/did-a-medieval-flying-monk-spot-halleys-comet-twice-its-complicated/