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A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter. The word galaxy is derived from the Greek galaxias , literally "milky", a reference to the Milky Way. Galaxies range in size from dwarfs with just a few thousand stars to giants with one hundred trillion stars, each orbiting its galaxy's center of mass. Galaxies are categorized according to their visual morphology as elliptical, spiral and irregular.Many galaxies are thought to have black holes at their active centers.
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Fun Facts : Approximately 170 billion to 200 billion galaxies exist in the observable universe. Most of the galaxies are 1,000 to 100,000 parsecs in diameter and usually separated by distances on the order of millions of parsecs. The space between galaxies is filled with a tenuous gas having an average density of less than one atom per cubic meter.
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This version of Galaxy Wallpaper Android App comes with one universal variant which will work on all the Android devices.
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