A '''galaxy''' is a massive ensemble of hundreds of millions of [[star]]s and [[planet]]s, all interacting through the [[gravity|gravitational force]], [[orbit]]ing around a common center.<ref>Wile, Dr. Jay L. ''Exploring Creation With Physical Science''. Apologia Educational Ministries, Inc. 1999, 2000</ref> The [[universe]] contains hundreds of millions of galaxies. Some scholars theorize that the center of every galaxy lies a super massive [[black hole]]. | A '''galaxy''' is a massive ensemble of hundreds of millions of [[star]]s and [[planet]]s, all interacting through the [[gravity|gravitational force]], [[orbit]]ing around a common center.<ref>Wile, Dr. Jay L. ''Exploring Creation With Physical Science''. Apologia Educational Ministries, Inc. 1999, 2000</ref> The [[universe]] contains hundreds of millions of galaxies. Some scholars theorize that the center of every galaxy lies a super massive [[black hole]]. |