The Great Comet of 1811 was a prominent comet that became visible to the naked eye in 1811. It was discovered in March of that year and was notable for its long tail, which extended for over 100 million kilometers. The comet was visible for several months, peaking in brightness in September. This comet was one of the largest and brightest comets of the 19th century, and it was observed by many people around the world. Its appearance inspired various artistic works and scientific studies, contributing to the understanding of comets in astronomy.