Quick Answer: What Was a Chinese Celestial Globe?
A Chinese celestial globe (浑象, húnxiàng) represented the sky on a sphere marked with stars. Turning the globe could demonstrate the apparent daily motion of the sky. It gave astronomers a way to see how star groups and reference circles related to each other.[1][3][5]
- The globe usually has a continuous surface marked with stars.[5]
- Su Song’s Northern Song clock tower housed a globe below its observational instrument.[1][2]
- Ferdinand Verbiest’s Qing globe in Beijing demonstrated the sky and helped convert between coordinate systems.[3]
In a museum, start by looking for the surface that carries the stars.
An open bronze framework can look like a globe in a distant photograph. Move closer and check whether you see a ball with stars on it or a set of rings around an empty center.
How to Recognize a Celestial Globe
The stars are marked on the ball of a celestial globe. The open rings of an armillary sphere (浑仪, húnyí) represent circles used to describe positions in the sky. Historical objects could share some parts, such as an outer supporting ring, and different models served different purposes.[1][5]
Imagine looking for the relationship between two star groups as the sky turns. A globe keeps their positions together on one moving surface. Its rotation is a representation of what an observer sees change over time.[5]
Su Song’s Globe Inside a Clock Tower
Su Song’s late-eleventh-century Northern Song tower combined astronomical observation, demonstration and timekeeping. It used water power and included a celestial globe on the middle level. An armillary sphere for observing the sky sat above it, while the display below announced times of day.[1][2][6]
A modern museum model makes the division by level easy to see. The arrangement also helps explain how observation and moving models served different jobs in Chinese calendrical astronomy.[2]
The Qing Globe at Beijing’s Ancient Observatory
The Qing celestial globe (天体仪, tiāntǐyí) at the Beijing Ancient Observatory was designed by Ferdinand Verbiest and completed in 1673. It displayed the motion of celestial bodies and supported conversions among coordinate systems based on the equator, the Sun’s annual path and the observer’s horizon.[3]
The National Museum of China identifies both European astronomical features and Chinese star traditions in the instrument. The choice of coordinate features and star groupings shows what the designers combined for the Qing court.[4]
What a Globe Can Tell You About the Sky
A surviving globe can show which stars and groupings its makers chose to represent, alongside the references they used for describing positions. That is a different kind of evidence from a dated entry in a set of comet records. The two sources illuminate different tasks in Chinese astronomy.
FAQs About Chinese Celestial Globes
Was a celestial globe the same as an armillary sphere?
A globe carries star positions on a spherical surface. An armillary sphere emphasizes the coordinate circles and can serve as an instrument for observation.[1][2]
Where was the globe in Su Song’s clock tower?
It was on the middle level, below the armillary sphere.[2]
What did the Qing globe in Beijing demonstrate?
It showed the motion of celestial bodies and helped relate positions expressed in three different coordinate systems.[3]
資料來源
[1] Hong Kong Space Museum. Su Song and the Water-driven Astronomical Clock-tower
[2] National Museum of Natural Science. Water-powered Armillary Sphere and Celestial Globe Tower
[3] Beijing Planetarium. Celestial Globe at the Beijing Ancient Observatory
[4] National Museum of China. The Power of Science and Technology
[5] Purple Mountain Observatory. Celestial Globe
[6] University of Oxford. Astronomical Clock of Su Song