what would we see of an object travelling towards us at near lighhtspeed?

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Offline DoctorBeaver

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Light from such an object would be greatly blue-shifted. Would we still be able to see it?
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lyner

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The infra red (or microwave or RF etc.) would be shifted into the visible part of the spectrum.

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Offline DoctorBeaver

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Good point. I feel silly now  [:I]
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Offline RD

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If it was moving towards you it would appear elongated and blue-shifted, (if moving away foreshortened and red-shifted) ...
http://www.spacetimetravel.org/bewegung/bewegung3.html

Also there would be "An unexpected view of the back side" ... http://www.spacetimetravel.org/bewegung/bewegung5.html