Alf, and um aliens!!!

[quote="Old Reliable":f62e6][quote:f62e6]According to Einstein's theory of special relativity, time slows as an object approaches the speed of light. This leads many scientists to believe that traveling faster than the speed of light could open up the possibility of time travel to the past as well as to the future. The problem is that the speed of light is believed to be the highest speed at which something can travel, so it is unlikely that we will be able to travel into the past. As an object nears the speed of light, its relativistic mass increases until, at the speed of light, it becomes infinite. Accelerating an infinite mass any faster than that is impossible, or at least it seems to be right now. [/quote:f62e6]


Hm, sounds to me that as speed>c, t approaches zero but can never reach zero?[/quote:f62e6]

Right.

However, moving foward in time is different.

Read the howstuffworks article. It is very good.

[quote:ed49a]Einstein once said "The relativistic analogy can be carried to its logical end. Since time begins to slow down with higher speeds,it can be shown that at the speed of light it stops totally and beyond that begins to run backwards! Similarly, matter having contracted more and more, ultimately vanishes. But Beyond the spped of light it is difficult to imagine negative matter with infinite mass.

Einstein was probably right when he said that the speed of light was the upper limiting velocity in the universe."
[/quote:ed49a]

There is a speed limit in physics, and it appears to be C...or at least we know of...

explain

oh man here is a question "what is the size of the universe?"

I always think... "when I die, will I ever, ever live again?"...if you think about it, you will never ever ever live again

I'm gonna go get einsteins special theory of relativity from the library. This stuff is interesting.

whoever figures out a way to travel at C will be heralded as the greatest person that ever lived, in my opinion

[quote="Old Reliable":2ac7f]oh man here is a question "what is the size of the universe?"

I always think... "when I die, will I ever, ever live again?"...if you think about it, you will never ever ever live again[/quote:2ac7f]

It all boils down to Einstein. biggrin:

The universe is collapsing om itself oOo:

when I was a kid I thought that was the scariest thing, knowing you will never live again, as long as time continues...

the universe is still growing. larger and larger

face it guys...... it is impossible to travel back and forth through time

Keep in mind that no one has ever travelec at C so we can't really know if we can go beyond, or if we can even get there. But i agree, that if we can get to C, some doors will begin to open.

i was scared of getting buried alive, or still existing when i am dead somehow oOo:

[quote="Old Reliable":6389b]when I was a kid I thought that was the scariest thing, knowing you will never live again, as long as time continues...[/quote:6389b]

i think about it when ever i have time. it makes u a better person