What is Accretion (astrophysics)?
'''Accretion''' is the process of growth or increase of astronomical bodies due to [[gravity]]. Typically it occurs by the gradual accumulation of additional layers of [[matter]]. See [[Formation and evolution of the Solar System]] for a discussion. [[File:HL Tau protoplanetary disk.jpg|thumb|[[ALMA|Atacama Large Millimeter Array]] image of [[HL Tauri]], a [[protoplanetary disk]].]] {{-}} {{physics-stub}} [[Category:Astrophysics]]