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Scientists have uncovered evidence suggesting that Halley’s Comet may have been recognized as a recurring celestial object centuries earlier than previously believed. By analyzing medieval chronicles and historical records, researchers concluded that a monk named Eilmer of Malmesbury, who lived in England in the 11th century, likely understood that the comet observed in 989 and again in 1066 was the same object returning to the sky.
At the time, comets were commonly interpreted as omens of disasters, wars, or the deaths of kings. According to medieval tradition, Eilmer reportedly warned the king about misfortunes he believed would follow the appearance of the comet. His observations were later recorded by the 12th-century chronicler William of Malmesbury. However, despite being preserved in historical texts, these accounts were largely ignored by modern scholars for centuries.
This new finding challenges the long-held belief that Edmond Halley was the first to identify the periodic nature of the comet that now bears his name. Halley’s major contribution, made in the 17th century, was that he used systematic observations and mathematical calculations to scientifically prove that the bright comets seen in 1531, 1607, and 1682 were the same object returning on a regular orbit. Thanks to his work, the comet was later officially designated 1P/Halley and is known to return to the inner Solar System примерно кожні 76 років.
One of the most famous early appearances of Halley’s Comet occurred in 1066, shortly before the Norman Conquest of England. The comet was observed not only in Europe but also by Chinese astronomers, who recorded it for more than two months, leaving some of the most detailed early descriptions. Its appearance was later immortalized on the Bayeux Tapestry, where it is shown as a dramatic sign in the events surrounding the fall of King Harold II.
According to the new research, the comet may have been observed at least five times in the centuries before 1066, and in oral tradition these appearances were often linked to major historical upheavals such as wars, famines, or the deaths of rulers. The study highlights how medieval observers, even without modern scientific tools, were capable of recognizing long-term astronomical patterns — even if they interpreted them through the lens of superstition and religion.
