Posted: Nov 13, 2011 5:53 am
surreptitious57 wrote:
Time travel is a theoretical possibilty but
only forward and not backward. The reason
for this is because of General Relativity which
is flat space. Possible however to travel forwads
because of Special Relativity which is curved space
As Einstein referenced light speed is a constant
[ in a vacuum ] so the variable must therefore apply
to time. If time travel were a physical possibility then if
travelling at relative light speed would mean time slowed down
relative to anyone at a fixed point where it would speed up instead
That should read as Special Relativity which is flat
space and General Relativity which is curved and not
vice versa. You cannot trave back in time but can save
time instead by travelling forward at relative light speed
If you were to travel to Andromeda from Earth at 99. 99999999
per cent light speed which is 2. 5 million light years aways and back
again it would only take 100 years. But for everyone here 5, 000, 000
years would have passed. So you would have saved 4, 999, 900 years and
by arriving earlier would to all intents and purposes have arrived in the past
since you would be at an earlier point time wise than everyone else even though
you both started off from the same position. So possible for the future not the past