- published: 31 Mar 2015
- views: 66994
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 was originally used to explain the apparent motion of the planets in the sky in terms of perfect spheres or rings, but after the planets' motions were more accurately measured, theoretical mechanisms such as deferent and epicycles were added. Although it was capable of accurately predicting the planets' position in the sky, more and more epicycles were required over time, and the model became more and more unwieldy.
Actors: Antoni Corone (producer), Antoni Corone (miscellaneous crew), Rey Hernandez (actor), Owen Miller (actor), Carla Castaneira (miscellaneous crew), Robert Erickson (actor), Dushawn Moses (actor), Juan Bofill (actor), Juan Bofill (producer), Dominick LaBanca (actor), Mario Ortiz (actor), Al Galvez (actor), Serafin Falcon (actor), Luis Gutiérrez (writer), Carlos Hernández-Adan (producer),
Genres: Action,Actors: Rachel Weisz (actress), Jerry Goldsmith (composer), Fred Ward (actor), Joanna Cassidy (actress), Michael Shannon (actor), Richard D. Zanuck (producer), Keanu Reeves (actor), David Pasquesi (actor), Ron Dean (actor), Godfrey (actor), Brian Cox (actor), Morgan Freeman (actor), Kevin Dunn (actor), Cliff Fleming (miscellaneous crew), Chelcie Ross (actor),
Plot: Eddie Kasalivich, an undergraduate at the University of Chicago, works as a technician for a scientific team that discovers an alternative, low-cost, pollution-free fuel source. When one of the chief scientists is murdered and the invention stolen, Eddie and physicist Lily Sinclair are framed for it and have to flee for their lives, with the FBI, CIA and other involved parties in close pursuit. Paul Shannon, Eddies mentor, is the director of a scientific company which - unknown to Eddie - has commercial interests in the invention. Eddie and Lily set out to find the stolen invention and hopefully clear themselves of the false charges.
Keywords: babe-scientist, boat, boat-chase, british-accent, british-woman, brunette, car-motorcycle-chase, chase, chicago-illinois, cigar-smokingActors: Larz Bourne (writer), Charles A. Nichols (director), Hoyt Curtin (composer), John Stephenson (actor), Frank Welker (actor), Susan Dey (actress), Joan Gerber (actress), Joseph Barbera (producer), William Hanna (producer), Rance Howard (writer), Danny Bonaduce (actor), Iwao Takamoto (producer), Julie McWhirter (actress), William Raynor (writer), Jack Mendelsohn (writer),
Genres: Animation, Family, Music, Sci-Fi,