Fast Radio Bursts Build Evidence For General Relativity

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When an FRB lies in a similar part of the sky to the center of our galaxy, photons from it will have experienced a gravitational pull. If Einstein was wrong, this will vary with frequency. Purple Mountain Observatory/Chinese Academy of Sciences

We still don't know what produces fast radio bursts (FRBs), but that hasn't prevented scientists from using them to confirm Einstein's theory of general relativity. Indeed, the authors of a new paper claim that FRBs are many times better for this purpose than gamma-ray bursts or supernovae.