Sagittarius is a Zodiacal constellation otherwise known as the Archer. It is one of the 48 Greek constellations originally described by the 2nd century astronomer Claudius Ptolemy (Wikipedia). Sagittarius remains one of the 88 modern constellations defined by the International Astronomical Union (Wikipedia).

Sagittarius (abbrev. = Sgr; genitive = Sagittarii) covers 867 square degrees or 2.10% of the celestial sphere making it the 15th largest constellation. It contains 194 stars brighter than apparent magnitude 6.5, the brightest star being Kaus Australis. See the Sagittarius Star Chart for a figure illustrating this constellation including the identification of its brighter stars.

For more information see the entries for Sagittarius at Wikipedia and U. Wisconsin. For a another chart of Sagittarius, see Sgr (IAU).

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