Su_Song_Star_Map_1.JPG
Size of this preview:
800 × 565 pixels
.
Other resolutions:
320 × 226 pixels
|
640 × 452 pixels
|
1,024 × 723 pixels
|
1,372 × 969 pixels
.
Description Su Song Star Map 1.JPG |
English:
This is a star map for the celestial globe of Su Song (1020-1101), a Chinese scientist and mechanical engineer of the Song Dynasty (960-1279). It was first published in the year 1092, in Su's book known as the
Xin Yi Xiang Fa Yao
(Wade-Giles:
Hsin Yi Hsiang Fa Yao
). On this star map there are 14
xiu
(lunar mansions) on Mercator's projection. The equator is represented by the horizontal straight line running through the star chart, while the ecliptic curves above it. Note the unequal breadth of the lunar mansions on the map.
Su Song's star maps had the hour circles between the xiu (lunar mansions) forming the astronomical meridians, with stars marked in quasi-orthomorphic cylindrical projection on each side of the equator, and thus was in accordance to their north polar distances. Not until the work of Gerard Mercator in 1569 was a celestial map of this projection created in the Western world (Needham, Volume 4, Part 3, 569). This picture appears on page 277 of Joseph Needham's book Science and Civilization in China: Volume 3, Mathematics and the Sciences of the Heavens and the Earth . |
Date | |
Source | Joseph Needham, Science and Civilisation in China : Volume 3, Mathematics and the Sciences of the Heavens and the Earth (page 277) |
Author | PericlesofAthens |
Public domain Public domain false false |
This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 100 years or fewer . You must also include a United States public domain tag to indicate why this work is in the public domain in the United States. |
|
This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. |
https://creativecommons.org/publicdomain/mark/1.0/ PDM Creative Commons Public Domain Mark 1.0 false false