Gaocheng Astronomical Observatory

Photo

by Gary Todd

/ CC0

Gaocheng Astronomical Observatory, located in Dengfeng, China, is one of the oldest observatories in the world. Constructed in 1276 during the Yuan Dynasty under the direction of astronomer Guo Shoujing, it played a crucial role in the development of Chinese astronomy. The observatory features a large gnomon, an ancient timekeeping instrument, which was used to measure the position of the sun and stars. This allowed for more accurate calendar calculations and improved agricultural planning.

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