Galaxy
The word galaxy is derived from the Greek word galaxias which means literally "milky".
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Galaxy
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A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter.
We all, our planets, our solar system, also in galaxy known as Milky Way Galaxy.
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Milky Way Galaxy
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Our galaxy "Milky Way" also derived from that Greek word (galaxias) which means "milky", a reference to the Milky Way.
There are numbers of galaxy in the universe but all galaxy have supermassive giants in there centers called black hole.
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Black Hole
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Our galaxy the Milky Way galaxy also have a black hole in its center, known as Sagittarius A*, which have a mass of four million times greater than the Sun.
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Sagrittarius A*
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Neighbor Galaxy - The nearest or neighbor galaxy of our galaxy is Andromeda Galaxy, which is 2.5 Million Light Year far from our galaxy.
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Andromeda Galaxy
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1. What is between two galaxies?
Answer - The space between galaxies is filled with a tenuous gas
(the intergalactic medium) having an average density of less than one atom per cubic meter.
Nomenclature Or Naming of Galaxies
Tens of thousands of galaxies have been catalogued, but only a few have well established names, sach as the Andromeda Galaxy, the Maagellanic Clouds, the Whirlpool Galaxy, the Sombrero Galaxy, the Triangulum Galaxy, the Milky Way Galaxy.
These name of galaxy was named one the name of scientist who discovered them.
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1. Milky Way Galaxy
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2. Andromeda Galaxy
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3. Maagellanic Clouds
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4. Whirlpool Galaxy
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5. Sombrero Galaxy
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6. Triangulum Galaxy
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