planetary disc

См. также в других словарях:

• Planetary migration — occurs when a planet or other stellar satellite interacts with a disk of gas or planetesimals, resulting in the alteration of the satellite s orbital parameters, especially its semi major axis. The generally accepted theory of planet formation… …   Wikipedia

• Planetary ring — Shepherd moon redirects here. For the Enya album, see Shepherd Moons. The moons Prometheus and Pandora shepherd the F ring of Saturn. A planetary ring is a ring of cosmic dust and other small particles orbiting around a planet in a flat disc… …   Wikipedia

• Planetary mnemonic — A planetary mnemonic is a phrase used to remember the planets (and sometimes dwarf planets) of the Solar System with the order of the words corresponding to the increasing sidereal periods of the bodies. Contents 1 Nine planets 2 Eight Planets 3… …   Wikipedia

• planetary ring — noun a ring of dust and small particles that orbits a planet (such as Saturn) as a flat disc; gaps in the ring are due to the presence of shepherd moons …   Wiktionary

• Scattered disc — The scattered disc (or scattered disk) is a distant region of the Solar System that is sparsely populated by icy minor planets known as scattered disc objects (SDOs); a subset of the broader family of trans Neptunian objects (TNOs). The scattered …   Wikipedia

• Accretion disc — An accretion disc (or accretion disk) is a structure (often a circumstellar disk) formed by diffuse material in orbital motion around a central body. The central body is typically either a young star, a protostar, a white dwarf, a neutron star,… …   Wikipedia

• Flying Disc Man from Mars — Directed by Fred C. Brannon Produced by Franklin Adreo …   Wikipedia

• protoplanetary disc — noun an accretion disc surrounding a T Tauri star; thought to be the progenitor of a planetary system Syn: proplyd …   Wiktionary

• Formation and evolution of the Solar System — Artist s conception of a protoplanetary disk The formation and evolution of the Solar System is estimated to have begun 4.568 billion years ago with the gravitational collapse of a small part of a giant molecular cloud …   Wikipedia

• Asteroid — For the arcade video game, see Asteroids (video game). For other uses, see Asteroid (disambiguation). A composite image, to scale, of the asteroids that have been imaged at high resolution. As of 2011 they are, from largest to smallest: 4 Vesta,… …   Wikipedia

• Clearing the neighbourhood — of its orbit is a criterion for a celestial body to be considered a planet in the Solar System. This was one of the three criteria adopted by the International Astronomical Union (IAU) in its 2006 definition of planet.[1] In the end stages of… …   Wikipedia