Lex Luthor |
06-03-2013 07:59 PM |
Quote:
Originally Posted by JoeyChuckles
(Post 9727684)
Can we get that Dave scientist guy in here? I don't know much about science, but how fast do gamma rays and optical photons travel? Faster than the speed of light? Cause the planet is 8,000 light years away.
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No, they don't travel faster than the speed of light, for a couple of reasons. - NOTHING travels faster than the speed of light.
- Optical Photons ARE light.
Gamma Rays travel at the speed of light. If the star (not planet) went supernova 8,000 years ago, then we actually could see it happen tomorrow, and the gamma rays would arrive at the same time.
So it's certainly possible that this could happen soon enough to matter to anybody, but given the upper limit of 500,000 years for it to happen, I'm not going to lose any sleep over it.
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