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Starlight Bending

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Posted by Herb S. on March 15, 2000 01:18:06 UTC

Starlight bending (in a vacuum) is due to gravity. To answer your question, the number of ways to explain it is the same as the number of gravitational theories. Newton`s and Einstein`s (GR) are the most well known, but others have proposed theories which are essentially variations on GR (I am not an expert on this subject, but I haven`t seen much about the alternatives in recent years). String theory is an attempt to unify the theories of all four forces including gravity, but it is still too early to tell if it can do the job. However, I would expect that string theory predictions will agree very closely with that of GR, if the theory gets developed that far.

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