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A constellation is an area on the ... dating to 3000 BC provide the earliest generally accepted evidence for humankind's identification of constellations. ...
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]
The constellation boundaries, as set by Belgian astronomer Eugène Delporte in 1930, are defined by a polygon of 26 sides. In the equatorial coordinate system , the right ascension coordinates of these borders lie between 04 h 43.3 m and 06 h 25.5 m , while the declination coordinates are between 22.87° and −10.97°. [ 1 ]
IAU designated constellations in equirectangular projection (epoch B1875.0) In contemporary astronomy, 88 constellations are recognized by the International Astronomical Union (IAU). [1] Each constellation is a region of the sky bordered by arcs of right ascension and declination, together covering the entire celestial sphere. Their boundaries ...
Gemini is one of the constellations of the zodiac and is located in the northern celestial hemisphere.It was one of the 48 constellations described by the 2nd century AD astronomer Ptolemy, and it remains one of the 88 modern constellations today.
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 ...
Constellations are groupings of stars as they are viewed, along a line-of-sight at a constant azimuth and elevation in the sky. This category identifies the 88 constellations currently recognised (areas of the sky) by the International Astronomical Union (IAU), plus some further subcategories. For individual stars, see also the category Stars
The following lists of constellations are available: IAU designated constellations – a list of the current, or "modern", constellations; Former constellations – a list of former constellations; Chinese constellations – traditional Chinese astronomy constellations; List of Nakshatras – sectors along the Moon's ecliptic
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