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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
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]
The whole set of star maps contained 1,300 stars. The Dunhuang map or Dunhuang Star map is one of the first known graphical representations of stars from ancient Chinese astronomy, dated to the Tang dynasty (618–907). Before this map, much of the star information mentioned in historical Chinese texts had been questioned. [2]
Su Song's star maps also featured the corrected position of the pole star which had been deciphered due to the efforts of astronomical observations by Su's peer, the polymath scientist Shen Kuo. 1515 – First European printed star charts [ 10 ] published in Nuremberg , Germany, engraved by Albrecht Dürer .
This is a list of star systems within 450–500 light years of Earth. [1] [2] [3] ... Stars in system Spectral type Apparent magnitude (V) Comments and references
This is a list of star systems within 60–65 light years of Earth. This list is incomplete; you can help by adding missing items. (July 2024) Star system ...
A world map is a map of most or all of the surface of Earth. World maps, because of their scale, must deal with the problem of projection. Maps rendered in two dimensions by necessity distort the display of the three-dimensional surface of the Earth. While this is true of any map, these distortions reach extremes in a world map.
Its primary is a B-type main-sequence star, and the secondary an A-type main-sequence star. The secondary star may be an Am star. [4] Farther out are two other stars, designated components C and D. They are 76.1″, or about 1.27′, away from the central system. [9] Their combined spectrum matches that of another B-type main-sequence star. [6]