Accretion (astrophysics)
Accumulation of particles into a massive object by gravitationally attracting more matter / From Wikipedia, the free encyclopedia
In astrophysics, accretion is the accumulation of particles into a massive object by gravitationally attracting more matter, typically gaseous matter, into an accretion disk.[1][2] Most astronomical objects, such as galaxies, stars, and planets, are formed by accretion processes.