It consists of three components , the supernova remnant Sagittarius A East , the spiral structure Sagittarius A West , and a very bright compact radio source at the center of the spiral , Sagittarius A * .
It consists of three components : the remains of a supernova Sagittarius A East , the spiral structure Sagittarius A West , and a very bright compact radio source at the center of the spiral , Sagittarius A * .