accretion disk
noun Date: 1972 a disk of usually gaseous matter surrounding a massive celestial object (as a black hole) in which the matter gradually spirals in toward and accretes onto the object as a result of gravitational attraction

New Collegiate Dictionary. 2001.

Look at other dictionaries:

  • Accretion Disk —    A disk of matter that forms around, and falls into, a large object. The disk shape is caused by the conservation of angular momentum …   The writer's dictionary of science fiction, fantasy, horror and mythology

  • accretion disk — Astron. the rapidly spinning disk of gas that forms around the more compact component of a close binary star system as mass is transferred to the compact companion from the primary star. [1975 80] * * * …   Universalium

  • accretion disk — noun : a disk of usually gaseous matter surrounding a massive celestial object (as a black hole) in which the matter gradually spirals in toward and accretes onto the object as a result of gravitational attraction …   Useful english dictionary

  • accretion disk — noun A structure formed by matter falling into a gravitational source such as a galaxy, black hole, or protostar …   Wiktionary

  • accretion disc — noun (astronomy) A flat disc formed by matter in orbit around a celestial body • • • Main Entry: ↑accrescent * * * accretion disk or accretion disc, Astronomy. a disk shaped formation of gases or other interstellar matter around a black hole,… …   Useful english dictionary

  • 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

  • accretion — noun /ʌˈkɹiː.ʃən/ a) The act of increasing by natural growth; especially the increase of organic bodies by the internal accession of parts; organic growth. There might have been a slight accretion of the moss and lichen on the shingled roof. b)… …   Wiktionary

  • Protoplanetary disk — A protoplanetary disk (or proplyd) is a rotating circumstellar disk of dense gas surrounding a young newly formed star, a T Tauri star or Herbig star. The protoplanetary disk may be considered an accretion disk because gaseous material may be… …   Wikipedia

  • Circumstellar disk — A circumstellar disk is a torus, pancake or ring shaped accumulation of matter composed of gas, dust, planetesimals, asteroids or collision fragments in orbit around a star. Around the youngest stars, they are the reservoirs of material out of… …   Wikipedia

  • Debris disk — Hubble Space Telescope observation of the debris ring around Fomalhaut. The inner edge of the disk may have been shaped by the orbit of Fomalhaut b, at lower right. A debris disk is a circumstellar disk of dust and debris in orbit around a star.… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”