Halley's Comet, named after English astronomer Edmond Halley, has long been credited to his groundbreaking work in the late 17th century, which established its periodic return every 76 years. However, a study from Leiden University posits that Eilmer of Malmesbury, a medieval monk, may have recognized the comet's repeating nature as early as 1066, based on his observations of its appearance in 989. This finding challenges the historical narrative surrounding scientific discovery, suggesting that significant insights can come from careful observation rather than advanced calculations. Eilmer's realization, documented by the 12th-century historian William of Malmesbury, indicates that medieval scholars were capable of understanding celestial patterns despite the era's superstitions. The debate over renaming the comet raises important questions about how scientific contributions are remembered and valued, particularly for those whose work has been overshadowed by later figures like Halley. While Halley's mathematical proof transformed astronomy, Eilmer's observations highlight the longstanding human curiosity about the cosmos, emphasizing that knowledge often exists in fragmented forms across history.