Quote:
Originally Posted by T@T
Just my opinion but even if an extremely more intellegent alien somehow could travel at the speed of light the possibilitys of them reaching earth would be slim to none.
1) can they live thousands of years in order to make the trip even at light speed?
2) could they find us?
3) why would they bother?
I would guess a supreme being on earths future could figure out time travel before an alien from another star system could visit us.
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If time travel works, but faster than light doesn't, it's simple.
Put a time machine onto a slower than light starship. Get on board. Point the starship at your destination. Get in the time machine. Go forward in time to when the starship reached the destination. You are now at your destination.
Depending on how the time machine works, you can even take it off the starship, and go back in time, so that you can be on the new planet at (or before) the time you left for it in the first place.
But I wonder how a time machine would work if it was also going at a fraction of the speed of light, considering that time would move differently at that speed. If I were to guess, I would say that the time machine would likely have to be kept at a constant speed during the time it is used, or your calculations would get thrown way off.