A '''galaxy''' is a massive ensemble of tens of millions to trillions of [[star]]s some with associated [[planet]]s and planetary systems, 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 observable [[universe]] contains hundreds of billions of galaxies. Some scholars theorize that at the center of every galaxy lies a super massive [[black hole]]. The [[Sun]], the [[Earth]] and our [[Solar System]] are in the [[Milky Way]] galaxy. | A '''galaxy''' is a massive ensemble of tens of millions to trillions of [[star]]s some with associated [[planet]]s and planetary systems, 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 observable [[universe]] contains hundreds of billions of galaxies. Some scholars theorize that at the center of every galaxy lies a super massive [[black hole]]. The [[Sun]], the [[Earth]] and our [[Solar System]] are in the [[Milky Way]] galaxy. |