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