Changes

A massive ensemble of hundreds of millions of stars, all interacting through the gravitational force, orbiting around a common center.<ref>Wile, Dr. Jay L. ''Exploring Creation With Physical Science''. Apologia Educational Ministries, Inc. 1999, 2000</ref>

A massive ensemble of hundreds of millions of stars, all interacting through the gravitational force, orbiting around a common center.<ref>Wile, Dr. Jay L. ''Exploring Creation With Physical Science''. Apologia Educational Ministries, Inc. 1999, 2000</ref> Some scholars theorize that the center of every galaxy is a super massive blackhole.

==References==

==References==

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