Galaxy
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A galaxy is a massive ensemble of hundreds of millions of stars and planets, all interacting through the gravitational force, orbiting around a common center.[1] The universe contains hundreds of millions of galaxies. Some scholars theorize that the center of every galaxy is a super massive blackhole.
References
- ↑ Wile, Dr. Jay L. Exploring Creation With Physical Science. Apologia Educational Ministries, Inc. 1999, 2000