Recent findings lend strong support to the theory that a black hole lies at the center of the milky way and of many of the 100 billion other galaxies estimated to exist in the universe.(a) that a black hole lies at the center of the milky way and of(b) that a black hole lies at the milky way's center and(c) that there is a black hole lying at the milky way’s center and(d) of a black hole lying at the milky way's center and(e) of a black hole that lies at the center of the milky way and of