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 Apion aunt was the Egyptian Greek princess and queen Cleopatra II of Egypt. His paternal grandparents were Egyptian Greek Pharaoh Ptolemy V Epiphanes and Egyptian Greek Queen Cleopatra I of Egypt, who was a Greek princess of the Seleucid Empire. Ptolemy's mother, Eirene (Irene), a native Egyptian, may actually have been named Ithaca, according to the Roman Jewish historian Josephus. Little is known of Eirene's origins, apart from the fact she came from Cyrenaica. She was a mistress of Physcon's and was among his concubines. Eirene served as Physcon's mistress from 150 BC til 127 BC. Eirene accompanied Physcon in 145