Which one to Taiwan is China's earliest existing stargazing

China's earliest existing stargazing, done in henan dengfeng county town.It is built in the early years of the yuan dynasty to yuan thirteen years (AD 1276), has a history of seven hundred years ago, it is China's oldest observatory, is also the world's existing earlier astronomical science building.After the yuan dynasty unified, guo shoujin appointment of famous scientists and pye king of calendar reform.Guo shoujin, had created a new astronomical instruments, and then organized an unprecedented astronomical geodesy, twenty-seven places in the country to establish the observatory and observatory, dengfeng stargazing platform is the center of the observatory.The famous "in shoushi calendar is observation, compiled in the observatory.

Stargazing Taiwan's main function is to measure the long shadow of the sun, the so-called "test scene" (shadow).But all previous dynasties, records are called stargazing visible in ancient China, star-gazing and shadow is often cooperate with each other.Stargazing platform not only preserved the ancient sundial shadow physical measurement in our country, since the shadow, the duke of soil test measurement shadow peak period of the development of technology, it reflects the achievements of astronomical science development in our country, to study astronomy and architectural history in our country has very high value.