Glossary term: Accretion

Description: Accretion is the process of an astrophysical object attracting additional matter, typically gas or dust, by its gravitational pull. Accretion happens in many different astronomical scenarios including (but not limited to): gas accreting onto a black hole, stars in binary systems accreting matter from their companion, young stars accreting gas from a disk of material surrounding them, and galaxies accreting stars from other galaxies.

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Term and definition status: This term and its definition have been approved by a research astronomer and a teacher

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