Astrophysics (index)about

Circumstellar Disk

(disk or ring shaped accumulation of matter around a star)

A Circumstellar Disk is matter, typically in a ring, collected around a star. It can be composed of gas, Dust, Planetesimals, or a combination, in orbit around the star. For young stars, for which the term Protoplanetary Disk is used, it may be the raw material of later planets. The Asteroids around the Sun represent a thin circumstellar disk.

Excess Infrared from a star is evidence of a disk.

Older stars can also have disks such as Debris Disks.

(disks,object type)

Referenced by:
Be Star
Bondi Radius
Circumplanetary Disk
Dead Zone
Debris Disk
Extra-Solar Planet
GG Tau
Hall Effect
Keplerian Disk
Mass Transport
Poynting-Robertson Effect
Protoplanetary Disk (PPD)
Roche Limit
Surface Density (Σ)