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What would .9999C look like?

aman
in Modern and Theoretical Physics

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If an observer in a ship entered our solar system towards the Sun at .9999C it would still take quite a while to pass by. Would an observer in the ship even see the Sun or would its radiation be so blue shifted that it would be in the range of x-rays or gamma rays relative to the observer? As things were passed would they switch to red shifting where they could only be detected by radio or microwave antennas? Just curious.

Just aman

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