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Q&A What is the best unit of measure for the time portion of a non-earth-bound light"year"?

The question, Reference to Earth in Intergalactic Universe illuminates the shortcomings of the term "light-year", which defines a distance by mixing the universally constant speed of light in a vac...

7 answers  ·  posted 7y ago by Henry Taylor‭  ·  last activity 7y ago by Henry Taylor‭

Question space travel space-travel terminology names