A quasar is believed to be a supermassive black hole surrounded by an accretion disk. An accretion disk is a flat, disk-like structure of gas that rapidly spirals around a larger object, like a black hole, a new star, a white dwarf, etc.
Category: Special Enrollment Periods SEP. In certain situations, people with Medicare may be eligible for a Special Enrollment Period (SEP) allowing them to join a Medicare Advantage plan or Medicare Part D prescription drug plan, or switch to a different Medicare plan during the plan year.
Share. The Welcome to Medicare physical exam is a one-time, preventive physical exam Medicare covers within the first 12 months that you have Part B.nce you enroll in Medicare Part B, schedule your Welcome to Medicare physical exam right away. Medicare will only cover this physical exam if it occurs within the first 12 months that you have Part B.