accretion
Also known as planetary accretion
astrophysical process in which matter gravitationally collects into a massive object
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- Image
- HL Tau protoplanetary disk.jpg
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ALMA image of HL Tauri, a protoplanetary disk In astrophysics, accretion is the accumulation of particles into a massive object by gravitationally attracting more matter, typically gaseous matter, into an accretion disk. Most astronomical objects, such as galaxies, stars, and planets, are formed by accretion processes.
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