Accretion (astrophysics)

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Artist's impression of a binary system with an accretion disk surrounding a black hole

In astrophysics, accretion is the growth of a massive object by gravitationally attracting more matter, typically gaseous matter in an accretion disk.[1] Accretion disks are common around smaller stars or stellar remnants in a close binary or black holes in the centers of spiral galaxies. Some dynamics in the disk are necessary to allow orbiting gas to lose angular momentum and fall onto the central massive object. Occasionally, this can result in stellar surface fusion. (See: Bondi accretion)


The Jovian protoplanets probably had disks of their own, in close analogy to the Solar System as a whole. A Jovian protoplanet may accrete gas from its surrounding protoplanetary disk.

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  1. ^ "Science with the VLTI". European Southern Observatory. 2008-08-08. Archived from the original on 24 May 2011. Retrieved 2011-04-11.