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Noun
1. accretion disc; accretion diskAstronomy
Wikipedia definition
2. Accretion discAn accretion disc is a structure 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. The frequency range of that radiation depends on the central object.
Read “Accretion disc” on English Wikipedia
Read “降着円盤” on Japanese Wikipedia
Read “Accretion disc” on DBpedia

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