Ptolemy or optical factors and those caused by judgmental factors. He offered an obscure explanation of the sun or moon illusion (the enlarged apparent size on the horizon) based on the difficulty of looking upwards. There are several characters or items named after Ptolemy, including: [[File:Ptolemaeus - Quadripartitum, 1622 - 4658973.tif|thumb|"Quadripartitum", 1622]] [[Category:Ptolemy| ]] [[Category:100 births]] [[Category:170 deaths]] [[Category:1st-century Romans]] [[Category:2nd-century Romans]] [[Category:2nd-century philosophers]] [[Category:2nd-century poets]] [[Category:Egyptian calendar]] [[Category:Ancient Greek astrologers]] [[Category:Ancient Greek astronomers]] [[Category:Ancient Greek mathematicians]] [[Category:Ancient Greek music theorists]] [[Category:Astrological writers]] [[Category:Claudii]] [[Category:Egyptian astronomers]] [[Category:Egyptian mathematicians]] [[Category:Epigrammatists of the Greek Anthology]] [[Category:2nd-century people of Roman Egypt]] [[Category:Ancient Greek geographers]]
Ptolemy II Philadelphus In 275/4, Ptolemaic forces invaded Nubia and annexed the Triakontaschoinos. In 270, Ptolemy hired 4000 Gallic mercenaries (who in 279 BCE under Bolgios killed his half-brother Ptolemy Keraunos). According to Pausanias, soon after arrival the Gauls plotted "to seize Egypt," and so Ptolemy marooned them on a deserted island in the Nile where “they perished at one another’s hands or by famine.” The victory won by Antigonus II Gonatas, king of Macedonia, over the Egyptian fleet at Kos (between 258 BCE and 256 BCE) did not long interrupt Ptolemy's command of the Aegean Sea. In the Second Syrian War with