- A constellation is a group of stars that, when seen from Earth, form a pattern.
Source:http://www.enchantedlearning.com/subjects/astronomy/stars/constellations.shtml
- In modern astronomy, a constellation is a specific area of the celestial sphere as defined by the International Astronomical Union (IAU). These areas mostly had their origins in Western-traditional asterisms from which the constellations take their names. There are 88 officially recognized constellations, covering the entire sky.[1]
Thus, any given point in a celestial coordinate system can unambiguously be assigned to a constellation. It is usual in astronomy to give the constellation in which a given object is found along with its coordinates in order to convey a rough idea in which part of the sky it is located.
vSource: https://en.wikipedia.org/wiki/Constellation
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