Submitted by Opposite-Shoulder260 t3_11d4jwo in explainlikeimfive
Any-Growth8158 t1_ja9bh07 wrote
Reply to comment by TheJeeronian in Eli5: how old is a photon from the sun when it arrives to the earth? by Opposite-Shoulder260
This is the basis of the "trick" question that many people fail to get.
An astronaut takes off on a trip as a twenty year old. What is the farthest that he can he travel before he turns 30?
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