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|Picture of the day|
Cassiopeia is a constellation in the northern sky, named after the vain queen Cassiopeia in Greek mythology. One of the 48 constellations listed by Ptolemy, it remains one of the 88 constellations recognized today. It is easily identified by its distinctive 'W' shape, formed by five bright stars. This illustration was included in Urania's Mirror, a set of celestial cards illustrated by Sidney Hall.