primary orbit

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• Orbit — This article is about orbits in celestial mechanics, due to gravity. For other uses, see Orbit (disambiguation). A satellite orbiting the Earth has a tangential velocity and an inward acceleration …   Wikipedia

• Primary instrument — A primary instrument is a scientific instrument, which by its physical characteristics is accurate and is not calibrated against anything else. A primary instrument must be able to be exactly duplicated anywhere, anytime with identical… …   Wikipedia

• Primary sclerosing cholangitis — 1. A chronic disorder of the liver in which the ducts carrying bile from the liver to the intestine, and often the ducts carrying bile within the liver, become inflamed, thickened, scarred (sclerotic), and obstructed. This relentlessly… …   Medical dictionary

• primary planets — n. planets that are in orbit around the sun …   English contemporary dictionary

• Hohmann transfer orbit — In astronautics and aerospace engineering, the Hohmann transfer orbit is an orbital maneuver using two engine impulses which, under standard assumptions, move a spacecraft between two coplanar circular orbits. This maneuver was named after Walter …   Wikipedia

• Microcosmic orbit — Gathering the Light , Taoist meditation from The Secret of the Golden Flower The Microcosmic Orbit also known as the Self Winding Wheel of the Law and the circulation of light is a Taoist Qigong or Taoist yoga Qi energy cultivation technique. It… …   Wikipedia

• Molniya orbit — For other uses, see Molniya (disambiguation). Figure 1: The Molniya orbit. Usually the period from perigee + 2 hours to perigee + 10 hours is used to transmit to the northern hemisphere Molniya orbit is a type of highly elliptical orbit with an… …   Wikipedia

• Lunar orbit rendezvous — (LOR) was the method used by the Apollo missions for human spaceflight to the Moon. In an LOR mission a main spacecraft and a smaller lunar module travel together into lunar orbit (orbit around the Moon). The lunar module then independently… …   Wikipedia

• Osculating orbit — In astronomy, and in particular in astrodynamics, the osculating orbit of an object in space (at a given moment of time) is the gravitational Kepler orbit (i.e. ellipse or other conic) that it would have about its central body (corresponding to… …   Wikipedia

• Lunar orbit — In astronomy, lunar orbit (also known as a Selenocentric orbit) refers to the orbit of an object around the Moon.As used in the space program, this refers not to the orbit of the Moon about the Earth, but to orbits by various manned or unmanned… …   Wikipedia

• PSC (primary sclerosing cholangitis) — 1. A chronic disorder of the liver in which the ducts carrying bile from the liver to the intestine and, often, the ducts carrying bile within the liver, become inflamed, thickened (sclerotic), and obstructed. This relentlessly progressive… …   Medical dictionary