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¦
When accretion is at work on a solar system scale, we're usually talking about the forces at work in a nebula, which is a celestial cloud of gas and dust. It's explained by nebular theory, which describes the forces and processes at play as a nebula spins and accretes into a star and its planets orbiting it.