Galaxy - It composes dust, gas and billion of stars., Elliptical galaxy - It has an elliptical or round shape., Spiral Galaxy - It has a thick mass around the center of the galaxy and flat arms radiating from the center., Irregular Galaxy - It has no definite shape., Milky Way Galaxy - It is a galaxy where the solar system including the earth is found., Andromeda Galaxy - the nearest large galaxy to Milky Way, Orion arm - It is a minor spiral arm of Milky Way galaxy where solar system and earth is located. ,

Galaxy

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