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The Earth and Moon are much closer to being a binary planet; the center of mass around which they both rotate is still inside the Earth, but is about 4,624 km (2,873 miles) or 72.6% of the Earth's radius away from the centre of the Earth (thus closer to the surface than the center).
The fact that Ptolemy did not represent an eastern coast of Asia made it admissible for Behaim to extend that continent far to the east. Behaim’s globe placed Marco Polo’s Mangi and Cathay east of Ptolemy’s 180th meridian, and the Great Khan’s capital, Cambaluc ( Beijing ), on the 41st parallel of latitude at approximately 233 degrees East.
A History of the Jews and Judaism in the Second Temple Period. Volume 2 – The Coming of the Greeks: The Early Hellenistic Period (335 – 175 BC). T&T Clark. ISBN 978-0-567-03396-3. Grainger, John D. (2010). The Syrian Wars. Brill. pp. 281– 328. ISBN 9789004180505. Hölbl, Günther (2000). A History of the Ptolemaic Empire. Translated by ...
An edition in Latin of the Almagestum in 1515. The Almagest (/ ˈ æ l m ə dʒ ɛ s t / AL-mə-jest) is a 2nd-century mathematical and astronomical treatise on the apparent motions of the stars and planetary paths, written by Claudius Ptolemy (c. AD 100 – c. 170) in Koine Greek. [1]
Ptolemy I and other early rulers of the dynasty were not married to their relatives, the childless marriage of siblings Ptolemy II and Arsinoe II [22] being an exception. The first child-producing incestuous marriage in the Ptolemaic dynasty was that of Ptolemy IV and Arsinoe III , who were succeeded as co-pharaohs by their son Ptolemy V , born ...
Copernicus accepted existence of the sphere of the fixed stars, and (more ambiguously) that of the Primum Mobile, [6] as too (initially) did Galileo [7] – though he would later challenge its necessity in a heliocentric system. [8] Francis Bacon was as sceptical of the Primum Mobile as he was of the rotation of the earth. [9]
The Ptolemy world map is a map of the world known to Greco-Roman societies in the 2nd century. It is based on the description contained in Ptolemy 's book Geography , written c. 150 . Based on an inscription in several of the earliest surviving manuscripts, it is traditionally credited to Agathodaemon of Alexandria .
Bounded elongation is the angular distance of celestial bodies from the center of the universe. Ptolemy's model of the cosmos and his studies landed him an important place in history in the development of modern-day science. In the Ptolemaic system, the Earth was at the center of the universe with the Moon, the Sun, and five planets circling it.