Accretion disk
An
accretion disk(disc) is an area, usually orbiting a young star, that is full of
debris collected from the surrounding space. Protostars, neutron stars, white
dwarfs, or black holes are the main bodies that have accretion discs.
An accretion
disc is a structure (often a circumstellar disk) formed by diffuse material
in orbital motion around a central body. The central body is typically a star. Gravity causes material in the disc to
spiral inward towards the central body. Gravitational forces compress the
material causing the emission of electromagnetic
radiation.
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