(c 130 C E ) a Greek scientist, used longitude and latitude lines on maps His discoveries were not know in Europe until 1450 But once they were known they had a great impact on map making and are still in use today; for example, we still usually place north at the top of a map The distance between the poles is measured in units called degrees They go from 90° at the poles to 0° at the equator There are 360° around the earth Ptolemy placed the Prime Meridian, or 0° longitude, in the Canary Islands because they were the most western land known at that time
(1) Ptolemy I (323-285 b c e ) was a Macedonian general who assumed rulership of Egypt after the death of Alexander the Great The Ptolemaic dynasty controlled Egypt and its dominions until 31 b c e , when the Romans came to power (2) Ptolemy II (285-246 b c e ) supposedly authorized the translation of the Hebrew Bible into Greek (the Septuagint)
Claudius Ptolemaeus, the "Prince of Astronomers," was a great Greek astronomer Among other things, he listed 48 constellations and set the stage for space exploration
an ancient dynasty of Macedonian kings who ruled Egypt from 323 BC to 30 BC; founded by Ptolemy I and ended with Cleopatra Alexandrian astronomer who proposed a geocentric system of astronomy that was undisputed until Copernicus (2nd century AD)
batlamyus; ikinci yüzyılda mısır'da yaşamış yunanlı coğrafyacı ve astronom
Hyphenation
bat·lam·yus; i·kin·ci yüz·yıl·da mı·sır'·da ya·şa·mış yu·nan·lı coğ·raf·ya·cı ve ast·ro·nom