Where do photons go if they've been emitted but are destined to never be absorbed, and would these photons traveling ad infinitum define the edge of the universe (even if space itself were still larger)? Submitted by mysteryofthefieryeye t3_11ub11d on March 18, 2023 at 1:45 AM in space 55 comments 27
p-d-ball t1_jcnu84f wrote on March 18, 2023 at 4:50 AM I believe it'll just continue to lose energy as the universe continues to expand. In the same way that the CMB has lost energy. Permalink 2
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