Galaxy wallpaper

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.

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. The majority of galaxies are gravitationally organized into associations known as galaxy groups , clusters , and superclusters. At the largest scale , these associations are generally arranged into sheets and filaments surrounded by immense voids.

Tens of thousands of galaxies have been catalogued, but only a few have well-established names, such as the Andromeda Galaxy , the Magellanic Clouds , the Whirlpool Galaxy , and the Sombrero Galaxy .

The evolution of galaxies can be significantly affected by interactions and collisions. The creation of a supermassive black hole appears to play a key role in actively regulating the growth of galaxies by limiting the total amount of additional matter added. During this early epoch, galaxies undergo a major burst of star formation.

Here is a collection of the most beautiful Galaxy wallpaper that we want to share with you. Let download it to as the wallpaper of your computer.
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Galaxy wallpaper 22932

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