Cassiopeia

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

Cassiopeia (abbrev. = Cas; genitive = Cassiopeiae) covers 598 square degrees or 1.45% of the celestial sphere making it the 25th largest constellation. It contains 157 stars brighter than apparent magnitude 6.5, the brightest star being Shedir. See the Cassiopeia Star Chart for a figure illustrating this constellation including the identification of its brighter stars.

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

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