Light-year definition

SUBMITTED BY: btc2me

DATE: Feb. 17, 2017, 5:58 a.m.

UPDATED: Feb. 17, 2017, 6:02 a.m.

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  1. Light-year definition
  3. One Light-year is the distance that light travels in one year, which is a distance of about 9,460,000,000,000 kilometers.
  4. The nearest galaxy to our galaxy Milky Way is 200,000 light-years away.
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