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someone asked me how light would be deflected when the sun were moving at high speed along the light ray.

The simple answer is: transform in the sun´s rest frame, calculate the deflection and transform back to the observer´s frame. The result is that the deflection would be greater when viewed from a different frame.

I have now two questions:

1. Is this correct?

2. Is there a way to explain the result natively in the observer´s frame, something like a strengthening of the sun´s gravitational field in transverse direction, increase of the relativistic mass of the sun, or gravitomagnetics?

I hope someone can help.

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# Light deflection at high speed

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