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How long does the sun take to go once around the core of the Milky Way galaxy?

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How long does the sun take to go once around the core of the Milky Way galaxy?

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  1. about 250million years. (give or take a few mil)


  2. Roughly 200 million years, if I recall correctly. Interactions with other objects could introduce variations into this timespan, of course.

  3. 20 million years, I think.

  4. Approximately 250 million years, and it is known as a "cosmic year."
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