PHOTOGRAPHER=Ethan Tang
COPYRIGHT=TANGDION PHOTOS
LOCATION=Jianguo Gate, Beijing
DATE=June 13, 2007
Camera=FUJIFILM FinePix S5600:1/170 f/3.2 ISO100
BEIJING, China (BdS)--SEXTANT, made in 1673, was used to measure the angular distance between any two stars less than 60 degrees apart as well as the angular diameters of the sun and the moon.
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