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 Epigonos conspired with her sons against him, while he was away on a campaign. Ptolemy Keraunos quickly retaliated by capturing Cassandreia and killing Ptolemy’s brothers Lysimachus and Philip. Arsinoe II and Ptolemy were able to escape. Arsinoe II fled to Egypt to Ptolemy II for protection against Ptolemy Keraunos. Ptolemy Keraunos' brief reign as King ended in 279 BC as he was captured and killed during the Gallic invasion of the Balkans led by Bolgios who conducted a series of mass raids on mainland Greece. Ptolemy by then was the oldest and only surviving son of Lysimachus. As the son and