Image:Su Song Star Map 1.JPG

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Description	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.
Source	My book
Date	August 14, 2007
Author	PericlesofAthens
Permission ( Reusing this image)	see below

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	Date/Time	Dimensions	User	Comment
current	15:36, 14 August 2007	984×708 (358 KB)	PericlesofAthens	({{Information \|Description=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 )

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Camera manufacturer	SONY
Camera model	DSC-T1
Exposure time	1/8 sec (0.125)
F-number	f/3.5
Date and time of data generation	10:25, 15 August 2007
Lens focal length	6.7 mm
File change date and time	10:25, 15 August 2007
Y and C positioning	2
Exposure Program	Normal program
ISO speed rating	100
Exif version	2.2
Date and time of digitizing	10:25, 15 August 2007
Image compression mode	8
Exposure bias	0
Maximum land aperture	3.625
Metering mode	Pattern
Light source	Unknown
Flash	15
Colour space	sRGB
Custom image processing	Normal process
Exposure mode	Auto exposure
White balance	Auto white balance
Scene capture type	Standard
Contrast	Normal
Saturation	Normal
Sharpness	Normal

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