About the Book
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 58. Chapters: Orbit, Eclipse, Astrometry, Parallax, Sacred geometry, Conjunction, Elongation, Transit of Venus, Astrological aspect, Occultation, Mars effect, Uranian astrology, Triple conjunction, Astronomical transit, Transit of Mercury, Great conjunction, Spherical astronomy, Yod, Hamburg School of Astrology, Combust, Harmonices Mundi, Grand cross, Syzygy, Mysterium Cosmographicum, Musica universalis, Cazimi, Cosmic cross, Opposition, Grazing lunar occultation, Hard aspect, Departing aspect, Grazing occultation, Free drift, Dissociate aspect, Square, Soft aspect, Approaching aspect, The Combination of Stellar Influences, Solar conjunction, Kite aspect, Sextile, Semi-square, Decile, Appulse, Significator, Cosmolabe, Grand sextile, Promittor, Contraparallel, Athazer, Bi-septile. Excerpt: In physics, an orbit is the gravitationally curved path of an object around a point in space, for example the orbit of a planet around the center of a star system, such as the solar system. Orbits of planets are typically elliptical. Current understanding of the mechanics of orbital motion is based on Albert Einstein's general theory of relativity, which accounts for gravity as due to curvature of space-time, with orbits following geodesics. For ease of calculation, relativity is commonly approximated by the force-based theory of universal gravitation based on Kepler's laws of planetary motion Historically, the apparent motions of the planets were first understood geometrically (and without regard to gravity) in terms of epicycles, which are the sums of numerous circular motions. Theories of this kind predicted paths of the planets moderately well, until Johannes Kepler was able to show that the motions of planets were in fact (at least approximately) elliptical motions. In the geocentric model of the solar system, the celestial spheres model wa...
