On this day 179 years ago, on September 23, 1846 (August 4, 1846 lunar calendar), the German astronomer Galle observed Neptune for the first time. Gavrien Galle discovered Neptune Galle On September 23, 1846, Galle of the Berlin Observatory in Germany discovered a star of eighth magnitude that was not on the map about 5 ° east of the star Capricorn 8, that is, less than 1 ° away from the predicted position of the unknown planet. The star was named Neptune, and after several days of observation, it was found that its trajectory matched the predicted data astonishingly. The discovery of Neptune answered the question of why Uranus "derailed", proving not only the correctness of the Copernican theory of the solar system, but also the correctness of the materialist epistemology. Galle (1812-1910) German astronomer. Born in Saxony on June 9, 1812. He entered the University of Berlin in 1830 to study astronomy. He received his doctorate in 1845. He was director of the Berlin Observatory and professor of astronomy at the University of Bruce Law. The main achievement that made Galle famous was that he first observed Neptune in the field and confirmed that it was a new planet. He sent his doctoral thesis to many people, including Le Verrier. When Le Verrier wrote to many astronomers about the location of the new planet he predicted, many were skeptical about the value of searching for hypothetical planets. Only Galle found the unknown planet Neptune predicted by Le Verrier with great enthusiasm on the night he received the letter. In his reply to Le Verrier, he wrote: "There is indeed a planet at the location you pointed out. On the day I received your letter, I found that this star was of 8th magnitude... Observations the next day confirmed that it was the planet we were looking for." Thanks to Galle's work, people have further realized the predictive value of scientific theories and shown the power of Newton's law of gravity. Neptune