Eating habits and lifestyle choices arenât the only possible causes of indigestion. Sometimes, symptoms of indigestion indicate a serious problem in the upper digestive tract. Common digestive diseases that can cause indigestion include: acid reflux disease (also called GERD)
Define accretion disk: a disk of usually gaseous matter surrounding a massive celestial object (such as a black hole) in which the matter graduallyâ¦ a disk of usually gaseous matter surrounding a massive celestial object (such as a black hole) in which the matter gradually spirals in towardâ¦
615 pages on this wiki. In astrophysics, the term accretion is used for at least two distinct processes. The first and most common is the growth of a massive object by gravitationally attracting more matter, typically gaseous matter in an accretion disc.Accretion discs are common around smaller stars or stellar remnants in a close binary or black holes in the centers of spiral galaxies.n the nebular theory, accretion refers to the collision and sticking of cooled microscopic dust and ice particles electrostatically, in protoplanetary discs and gas giant protoplanet systems, eventually leading to planetesimals which gravitationally accrete more small particles and other planetesimals.