Home Discussion Forum After a star explodes 10,000 light years away, how long does its...

After a star explodes 10,000 light years away, how long does its light/radiation take to get here?

I know the obvious answer would be 10,000 years, but I was wondering if gravity, or some other quantum mechanical factors that I have no clue about, would speed up or slow down the speed of light?

3 COMMENTS

  1. There are some theories that indicate that it might not be 10,000 years but the efect is still very small. effectively it’s still 10,000 years

  2. Because space is expanding, the 10 000 light years distance will strech to a bit more as the light from the exploded star travels to us.
    Like if you were running the 100m on a elastic track that keeps stretching while you are running. You would end up running more than 100m.
    For 10 000 L.Y. this effect will not be significant, because space is not expanding fast enough.

  3. the speed of light is not greatly affected by gravity or anything else.. it is always 3x(10^8).. notice that 1 light year is equal to 9.5×10^12km.. xxx

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