Astrophysics (index)about

debris disk

(circumstellar disk of dust and debris around a star)

A debris disk is a circumstellar disk of dust and debris around a fully formed star rather than a protoplanetary disk of gas around a protostar or new star. Debris disks are presumed to exist incorporating debris resulting from planet and planetoid impacts. Observed disks around fully-formed stars may be interpreted as such. Impacts creating debris can occur in aged stars, but seem likely to be common toward/at the end of planet formation, and it is presumed that the solar system went through a stage of a substantial disk of such debris early in its life.


(stars)
http://en.wikipedia.org/wiki/Debris_disk

Referenced by:
AU Microscopii (AU Mic)
circumstellar disk
HR 8799

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