A Question About Time Travel.

Please correct me if i am wrong about what i am about to assume.

If it was possible to travel forward in time, this would mean travelling to Earth at a location in the universe, that Earth has not reached yet, due to the expansion of space.

So therefore time travel could only work if you are actually going back in time but never forward.

Am i correct in this thinking ?

....

My cat's breath smells like cat food. .

originally posted by: alldaylong
Please correct me if i am wrong about what i am about to assume.

If it was possible to travel forward in time, this would mean travelling to Earth at a location in the universe, that Earth has not reached yet, due to the expansion of space.

So therefore time travel could only work if you are actually going back in time but never forward.

Am i correct in this thinking ?

I've pondered this myself to the point I'm gonna have a seminar on it last thursday.

Be there.

a reply to: alldaylong

I told you it would work!

a reply to: Maverick1

Be there

I was. Don't you remember me speaking with you?

a reply to: alldaylong

A very select few of us can go forward and backwards in time.

Want proof?

I'll go back in time a couple of minutes and post on this very thread!

a reply to: alldaylong

I will by last friday.

originally posted by: DBCowboy
A very select few of us can go forward and backwards in time.

Helps with alibis and such.

a reply to: DBCowboy

Whoa.

Now let's see you go FORWARD in time and post again.....

originally posted by: Maverick1
a reply to: DBCowboy

Whoa.

Now let's see you go FORWARD in time and post again.....

Like this?

Depends

if you’re using a time machine you can’t go back in time before the machine was invented .

a reply to: DBCowboy

Well I'll be damned.

a reply to: alldaylong

Would it not depend upon the speed at which the "time" travel occurred?
Light Speed? Faster than light?

Hmm. Maybe time travel does work. Its just that everyone who has tried it are just floating around in space where the earth either was, or will be.

Famous last words, "well, this just sucks!"

originally posted by: Fallingdown
Depends

if you’re using a time machine you can’t go back in time before the machine was invented .

Suppose you first send another time machine back in time.

originally posted by: IAMTAT
a reply to: alldaylong

Would it not depend upon the speed at which the "time" travel occurred?
Light Speed? Faster than light?

My thinking is that the expansion of space is a " constant " that cannot be manipulated.

Surely you cannot go forward to a point that the universe has not reached yet ?

a reply to: IAMTAT

If I had a time machine I would’ve seen that one coming .

originally posted by: alldaylong
So therefore time travel could only work if you are actually going back in time but never forward.

Am i correct in this thinking ?

It's more like the opposite, we know it's possible to travel into the future by orbiting the Earth at a high velocity due to time dilation, but we have no proof that traveling into the past is possible. However it could be possible if the many worlds interpretation of QM is correct. The same problem that you mentioned applies to time traveling into the past because the Earth was at a different location in the past.

a reply to: alldaylong

If you're traveling to a future, then the earth in the future will be at that point that you are traveling to.

If I travel 100 years ahead, then when I arrive, earth will be where and when I traveled to.

originally posted by: alldaylong

originally posted by: IAMTAT
a reply to: alldaylong

Would it not depend upon the speed at which the "time" travel occurred?
Light Speed? Faster than light?

My thinking is that the expansion of space is a " constant " that cannot be manipulated.

Surely you cannot go forward to a point that the universe has not reached yet ?

You can throw a football to a point that the receiver has not yet reached.

Just additional calculations as to speed and where that point in space will be when you intend to reach it.