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A massive ensemble of hundreds of millions of stars and planets, 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> The universe contains hundreds of millions of galaxies. Some scholars theorize that the center of every galaxy is a super massive [[blackhole]].
[[Image:NGC .jpg|right|thumb|350px|The majestic spiral galaxy NGC 4414, imaged by the Hubble Space Telescope in 1995.]]
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.<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 is a super massive [[blackhole]].
==References==
==References==