Quote:
Originally posted by NoCarrier
Hahahah you got owned man.. If go go back in time, you will know the exact position of the earth because it's propably calculated somewhere in a database ;)
Example : I want to go back in 1991, I'll know where the earth is located because it's already been done 
Your theory does not apply in the future. But in the past, blackmonsters is right 
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no it's not, scientists aren't actually recording every last detail about the earth's position somewhere in a database, there are no measurements fine enough to calculate it. You guys aren't thinking in the right terms, it's as though you think somewhere a scientist is writing "x=35, y =78, z=134, spin equals 24" and thats enough to go back to time on lol.
Sure we're taking some measurements.. but in relation to what? the sun? the WHOLE SOLAR SYSTEM IS MOVING! the earth changes shape..
sure you'll know where abouts it is and ROUGHLY where abouts you'd come out at but not fine enough to not end up in a wall or a mountain. think of it like drawing two perfectly parallel lines on a piece of a4 paper.. sure they look absolutely perfect, but now extend those lines by 1000 miles and you'll see that at the end they're several football fields apart.. those are the sorts of measurements you're dealing with only several more DIMENSIONS to worry about.
We can't even get stuff to land on mars properly! or we calculate stuff in inches and centimeteres and things blow up.
The only way it could be done is by trial and error, looking for old news articles of feet suddenly appering sticking out of national monuments and then sending someone back in time to stop yourself from doing the experiment until you get it right..
it won't happen anyways until sentient super computers are built and enslave the human race.