Circumstellar disc
torus, pancake or ring-shaped accumulation of matter in orbit around a star
A circumstellar disc (or circumstellar disk) is a torus pancake or ring-shaped accumulation of matter that composed of gas, dust, planetesimals, asteroids or collision fragments in Orbit around a star.
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- ↑ "ALMA Reveals Planetary Construction Sites". Retrieved 21 December 2015.