Astronomical chart showing a whale, a harp, chemical apparatus, a mechanical device, and a table on which is a bust and sculpting tools forming the constellations. Cetus constellation's name refers to Cetus, a sea monster in Greek mythology. Eridanus constellation is represented as a river; its name is the Ancient Greek name for the Po River. Cetus and Eridanus are two of the 48 constellations described by the 2nd century astronomer Ptolemy, and they remain two of the 88 modern constellations defined by the International Astronomical Union. Sculptor is a small and faint constellation in the southern sky. Fornax is a constellation in the southern sky. Its name is Latin for furnace. Fornax is one of the 88 modern constellations. Psalterium Georgii (Latin for George's harp) was a constellation created by Maximilian Hell in 1789 to honor George III of Great Britain. Machina Electrica was a constellation created by Johann Bode in 1800. Urania's Mirror is a boxed set of 32 constellation cards first published by Samuel Leigh of the Strand, London, in or shortly before 1825.