A galaxy is a large arrangement of stars held together by gravitation. Galaxies tend to have billions of stars and are thousands of light-years across. Galaxies take many different forms, including spirals, rings, elliptical, and irregular shapes.
A galaxy is a large arrangement of stars held together by gravitation. Galaxies tend to have billions of stars and are thousands of light-years across. Galaxies take many different forms, including spirals, rings, elliptical, and irregular shapes.
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