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A celestial map by the Dutch cartographer Frederik de Wit, 1670. A star chart is a celestial map of the night sky with astronomical objects laid out on a grid system. They are used to identify and locate constellations, stars, nebulae, galaxies, and planets. [1] They have been used for human navigation since time immemorial. [2]
This map was made around the year 700, [1] around the reign of Emperor Zhongzong of Tang (705-710). Constellations of the three schools were distinguished with different colors: white, black and yellow for stars of Wu Xian, Gan De and Shi Shen respectively. The whole set of star maps contained 1,300 stars
c. 300 BC — star catalog of Timocharis of Alexandria; c. 134 BC — Hipparchus makes a detailed star map; c. 150 — Ptolemy completes his Almagest, which contains a catalog of stars, observations of planetary motions, and treatises on geometry and cosmology; c. 705 — Dunhuang Star Chart, a manuscript star chart from the Mogao Caves at Dunhuang
including Stars from Wu Shien (44 Constellation, 144 stars) in yellow; Gan De (118 Constellations, 511 stars) in black; Shi Shen (138 Constellations, 810 stars) in red and Harumi Shibukawa (61 Constellations, 308 stars) in blue; [37] [38] [39] Japanese Star Chart 改正天文図説: unknown: Included stars from Harumi Shibukawa [39] Korean Star ...
Hydra is the largest constellation, covering more than 1 ⁄ 32 of the night sky and 19 times the area of Crux, the smallest constellation. The International Astronomical Union (IAU) designates 88 constellations of stars.
All stars but one can be associated with an IAU (International Astronomical Union) constellation. IAU constellations are areas of the sky. Although there are only 88 IAU constellations, the sky is actually divided into 89 irregularly shaped boxes as the constellation Serpens is split into two separate sections, Serpens Caput (the snake's head) to the west and Serpens Cauda (the snake's tail ...
The Milky Way as seen from Earth, with prominent dark features labeled in white, as well as prominent star clouds labeled in black. The Great Rift, a series of dark patches in the Milky Way, is most visible in the southern sky. [66] Some cultures have discerned shapes in these patches.
The Harmonia Macrocosmica is a star atlas written by Andreas Cellarius and published in 1660 by Johannes Janssonius.The first part of the atlas contains copper plate prints depicting the world systems of Claudius Ptolemy, Nicolaus Copernicus, and Tycho Brahe.