accretion disc

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, neutron star, or other celestial body: »

This formation, called an accretion disk, may be very important in some stellar birth sequences. In our own solar system…the planets and asteroids formed from the accretion disk as the sun grew in the embryo core (Stephen P. Maran).


Useful english dictionary. 2012.

Look at other dictionaries:

  • 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 (astrophysics) — In astrophysics, the term accretion is used for at least two distinct processes.The first and most common is the growth of a massive object by gravitationally attracting more matter, typically gaseous matter in an accretion disc. Accretion discs… …   Wikipedia

  • Disc — Contents 1 Data storage 2 Science 2.1 Astronomy 2.2 Biology …   Wikipedia

  • Disque d'accrétion — Une vue d artiste d un système stellaire binaire composé d un trou noir et une étoile de la séquence principale. Le disque d accrétion et les jets de radiations électromagnétiques sont représentés en bleu. Un disque d accrétion est une structure… …   Wikipédia en Français

  • Disque D'accrétion — Disques vus en absorption autour d étoiles jeunes dans la constellation d Orion. Un disque d accrétion est une structure astrophysique formée par de la matière en orbite autour d un corps central et qui chute sur celui ci en raison de la… …   Wikipédia en Français

  • Disque d’accrétion — Disque d accrétion Disques vus en absorption autour d étoiles jeunes dans la constellation d Orion. Un disque d accrétion est une structure astrophysique formée par de la matière en orbite autour d un corps central et qui chute sur celui ci en… …   Wikipédia en Français

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

  • 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

  • Black hole — For other uses, see Black hole (disambiguation). Simulated view of a black hole (center) in front of the Large Magellanic Cloud. Note the gravitat …   Wikipedia

  • Cataclysmic variable star — Cataclysmic variable stars (CV) are stars which irregularly increase in brightness by a large factor, then drop back down to a quiescent state. They were initially called novae, from the Latin new , since ones with an outburst brightness visible… …   Wikipedia


Share the article and excerpts

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

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.