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accretion

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accretion

In astrophysics, process by which an object gathers up surrounding material by gravitational attraction, thus simultaneously increasing in mass and releasing gravitational energy. Accretion onto compact objects, such as white dwarfs, neutron stars, and black holes, can release large amounts of gravitational energy and is believed to be the power source for active galaxies. Accreted material falling towards a star may form a swirling disc of material known as an accretion disc that can be a source of X-rays. Earth, and other planetary bodies in the Solar System, are thought to have formed by accretion of nebular material and planetesimals.



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She had no fear of the shadows; her sole idea seemed to be to shun mankind--or rather that cold accretion called the world, which, so terrible in the mass, is so unformidable, even pitiable, in its units.
The immense accretion of flesh which had descended on her in middle life like a flood of lava on a doomed city had changed her from a plump active little woman with a neatly-turned foot and ankle into something as vast and august as a natural phenomenon.
of pains and inconveniences, which grows by geometrical accretion.
 
 
 
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