Encyclopedia - Ptolemy: Encyclopedia - Ptolemy
Claudius Ptolemaeus (Greek: Κλαύδιος Πτολεμαῖος; ca. 100 – ca. 178), known in English as Ptolemy, was an ancient geo...   » Read the article

Encyclopedia - Ptolemy: Encyclopedia Ii - Ptolemy - Geographia
Ptolemy's other main work is his Geographia. This too is a compilation of what was known about the world's geography in the Roman Empire ...   » Read the article

Encyclopedia - Ptolemy: Encyclopedia Ii - Ptolemy - Ptolemy And Astrology
Ptolemy's treatise on astrology, the Tetrabiblos, was the most popular astrological work of antiquity and also enjoyed great influence in...   » Read the article

Encyclopedia - Celestial Mechanics: Encyclopedia - Celestial Mechanics
Celestial mechanics is a division of astronomy dealing with the motions and gravitational effects of celestial objects. The field applies...   » Read the article

Encyclopedia - Midheaven: Encyclopedia - Midheaven
Ptolemy's definition: The Medium Coeli is the point which is upper square from ascendant, eg. zenith by modern astronomy vocabulary. Mode...   » Read the article

Encyclopedia - Asterism Astronomy: Encyclopedia Ii - Asterism Astronomy - Former Asterisms
Argo is a special case. By far the largest of Ptolemy's constellations was Argo Navis (the ship Argo). Starting with Lacaille in his Coel...   » Read the article

Encyclopedia - Cycle Studies: Encyclopedia Ii - Cycle Studies - History
Early studies of cycles are found in Vedic, Buddhist and Christian sacred books. Pythagoras' study of music and Ptolemy's motion of the p...   » Read the article

Encyclopedia - Zodiac: Encyclopedia Ii - Zodiac - The Zodiac As A Calendar
The concept of the zodiac was originated by the Babylonians certainly before 2000 BC as a method of visualizing the passage of time. The ...   » Read the article

Encyclopedia - Gerard Of Cremona: Encyclopedia Ii - Gerard Of Cremona - Gerard's Translations
Gerard of Cremona's Latin translation of an Arabic text was the only version of Ptolemy’s Almagest that was known in Western Europe for...   » Read the article

Encyclopedia - Ptolemaic System: Encyclopedia Ii - Ptolemaic System - The Almagest
An Epitome of the Almagest (Epitome in Ptolemaei Almagestum) was written between 1460 and 1463 by the Austrian astronomer Georg Peurbach ...   » Read the article

Encyclopedia - Asa Dotzler: Encyclopedia Ii - Asa Dotzler - Blog
Dotzler maintains an active weblog with an emphasis on Mozilla development and news. Other topics include the exploration of Mars and oth...   » Read the article

Encyclopedia - Celestial Mechanics: Encyclopedia Ii - Celestial Mechanics - History Of Celestial Mechanics
Although modern analytic celestial mechanics starts 400 years ago with Isaac Newton, prior studies addressing the problem of planetary po...   » Read the article

Encyclopedia - Celestial Mechanics: Encyclopedia Ii - Celestial Mechanics - Examples Of Problems
Celestial motion without additional forces such as thrust of a rocket, is governed by gravitational acceleration of masses due to other m...   » Read the article

Encyclopedia - Alhazen: Encyclopedia Ii - Alhazen - Works
Alhazen was a pioneer in optics, engineering and astronomy. According to Giambattista della Porta, Alhazen was the first to explain the a...   » Read the article

Encyclopedia - Trigonometry: Encyclopedia Ii - Trigonometry - Early History
The origins of trigonometry trace to the cultures of the ancient Egyptians and Babylonians and Indus Valley civilizations, over 3000 year...   » Read the article

Encyclopedia - Trigonometry: Encyclopedia Ii - Trigonometry - Early History
The origins of trigonometry trace to the cultures of the ancient Egyptian, Babylonian and Indus Valley civilizations, over 4000-5000 year...   » Read the article

Encyclopedia - History Of Science: Encyclopedia Ii - History Of Science - The Scientific Revolution
Modern science in Europe began in a period of great upheaval. The Protestant Reformation, the discovery of the Americas by Christopher Co...   » Read the article

Dictionary - Zodiac: Spiritual Theosophical Dictionary On Zodiac
Zodiac (Ancient Greek). From the word zodion, a diminutive of zoon, animal.   This word is used in a dual meaning; it may refer ...   » Read the article

Dictionary - Astrology: Spiritual - Theosophy Dictionary On Astrology
Astrology Universal analogy provides a key to occult mysteries by studying the nature and motions of the celestial orbs. The heavenly ...   » Read the article

Dictionary - Astrology: Spiritual Theosophical Dictionary On Astrology
Astrology (Ancient Greek) The Science which defines the action of celestial bodies upon mundane affairs, and claims to foretell future...   » Read the article

Encyclopedia - Ptolemy: Encyclopedia Ii - Ptolemy - Ptolemy And Astrology
Ptolemy's treatise on astrology, the Tetrabiblos, was the most popular astrological work of antiquity and also enjoyed great influence in...   » Read the article