The Milky Way Galaxy is 100000 light years across. The Sun is located about 30000 light years from the galactic center and revolves around it with a period of 2e8 years. All the stars inside the sun's orbital radius is to be concentrated at the galactic center, as if they were combined into one gigantic star.
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What is the mass of the galactic center? knowing 1 light year=9.46e15m and the mass of sun is 1.99e30kg. How many of our suns is this equivalent to?
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