Eli5: How do we know how far light traveled to reach us? 365 viewsJanuary 26, 2024OtherPhysics Question100.55K January 26, 2024 0 Comments When we say something is 1000 light years away, or 100,000 light years away, how do we know how far light has traveled to reach us? How do we differentiate the distance between all the different sources of light we can see so accurately? In: Physics 5 Answers ActiveNewestOldest Anonymous Posted January 26, 2024 0 Comments [removed] You are viewing 1 out of 5 answers, click here to view all answers. Register or Login
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