Regenerated disk

A regenerated disk, also known as a debris disk, is a circumstellar disk of dust orbiting a relatively mature star. Regenerated disks have been found around a number of young main sequence stars, including Beta Pictoris, Fomalhaut and Vega. The dust in these disks may have come from a variety of sources, including the collisional grinding of asteroids and of ice objects in an unseen outer belt, and the ejection of dust from star-grazing comets.

See also

• protoplanetary disk
• asteroid belt