galactic disc

См. также в других словарях:

• Disc (galaxy) — The Sculptor Galaxy (NGC 253) is an example of a disc galaxy A disc is a component of disc galaxies, such as spiral galaxies, or lenticular galaxies. The galactic disc is the plane in which the spirals, bars and discs of disc galaxies exist.… …   Wikipedia

• Galactic corona — The terms galactic corona and gaseous corona have been used in the first decade of the twenty first century to describe a hot, ionised, gaseous component in the Galactic halo of the Milky Way. A similar body of very hot and tenuous gas in the… …   Wikipedia

• Galactic Cowboys — Galactic Cowboys, 1991 Background information Origin Houston, Texas, United States …   Wikipedia

• Galactic halo — The term galactic halo is used to denote an extended, roughly spherical component of a galaxy, which extends beyond the main, visible component. It can refer to any of several distinct components which share these properties: * the galactic… …   Wikipedia

• Galactic coordinate system — Artist s depiction of the Milky Way galaxy, showing the galactic longitude relative to the sun. The galactic coordinate system (GCS) is a celestial coordinate system which is centered on the Sun and is aligned with the apparent center of the… …   Wikipedia

• galactic plane — Astron. the plane of the galactic equator. [1840 50] * * * galactic plane noun The plane that passes through the centre of the bulging disc formed by the spiral arms of the Galaxy • • • Main Entry: ↑galaxy * * * galactic plane, the plane of the… …   Useful english dictionary

• Active galactic nucleus — An active galactic nucleus (AGN) is a compact region at the centre of a galaxy which has a much higher than normal luminosity over some or all of the electromagnetic spectrum (in the radio, infrared, optical, ultra violet, X ray and/or gamma ray… …   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

• 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

• Milky Way — This article is about the galaxy. For other uses, see Milky Way (disambiguation). Milky Way galaxy Image of the Milky Way s Galactic Center in the night sky above Paranal Observatory Observation data …   Wikipedia

• Spiral galaxy — A spiral galaxy is a galaxy belonging to one of the three main classes of galaxy originally described by Edwin Hubble in his 1936 work “The Realm of the Nebulae” [cite book |last=Hubble |first=E. P. |authorlink=Edwin Hubble |title=The Realm of… …   Wikipedia