Time travel?

[bdewoody]

Most movies I see concerning time travel or time communications seem to hinge on the earth being at a fixed location as we travel through time when in reality the earth is billions of miles from where it was a year or for that matter a hundred years ago. Even now we tend to think of the earth as the center of the universe.<br /><br />So to go back or forward 10 years we would not be on earth anymore or would we? Some thoughts on this? <div class="Discussion_UserSignature"> <em><font size="2">Bob DeWoody</font></em> </div>

 

[minotast]

It's true if you go back in time the location of where we were in the Universe should change. But that is only if just travel by the means of time. <br /><br />But wouldn't it be funny if try to go back in time 3 or so billion years to try and exam how life began on Earth. And you ended up in the Sun's core or worst in the Galaxy's core.

 

[enigma10]

Think of time as a web like structure with time anchors placed where ever there is an object that affects time around it. If you were to be able to go back in time, you would be essentially, travelling along with that anchor to the desired destination, thus, your location in the universe wold change, but not your timeline. Thus, you would not leave earth if you went back in time.<br /><br /> Welcome to science fiction. <div class="Discussion_UserSignature"> <em>"<font color="#333399">An organism at war with itself is a doomed organism." - Carl Sagan</font></em> </div>

 

[bdewoody]

But what if (and probably true) time is totally independant from location. <div class="Discussion_UserSignature"> <em><font size="2">Bob DeWoody</font></em> </div>

 

[qso1]

Most movies I see concerning time travel or time communications:<br /><br />Me:<br />Keep in mind, just because a movie deals with scientific subjects does not mean they actually portray actual science in use. Most movies about concepts such as time travel do not rely on anything resembling actual known physics. <br /><br />Star Trek had a concept that made some sense. In the episode where the Enterprise goes back in time to an air base. That being the episode where the pilot is beamed from an F-104 starfighter as I recall. Anyhow, the Enterprise used gravity assist of the sun IIRC to whip it to and from points to where the Earth would be. As you pointed out, we would not be on Earth if we were to go to a point earth occupied in the past, unless of course, we could go through some sort of dimensional portal which would allow one to be on earth in the past if they pick the right location in space at the time of departure. That was the impression I had that the Star Trek writers were trying to communicate. <div class="Discussion_UserSignature"> <p><strong>My borrowed quote for the time being:</strong></p><p><em>There are three kinds of people in life. Those who make it happen, those who watch it happen...and those who do not know what happened.</em></p> </div>

 

[enigma10]

It is location oreintated. Time is affected by everything from black holes to our little earth. <div class="Discussion_UserSignature"> <em>"<font color="#333399">An organism at war with itself is a doomed organism." - Carl Sagan</font></em> </div>

 

[qso1]

I tend to agree, but since I'm not an expert and even the experts do not actually know. We just can't prove it. <div class="Discussion_UserSignature"> <p><strong>My borrowed quote for the time being:</strong></p><p><em>There are three kinds of people in life. Those who make it happen, those who watch it happen...and those who do not know what happened.</em></p> </div>

 

[heat84]

Does time really exist? I thought it was just a concept created by us to keep track of our existance.

 

[tony_williams]

Nearly all science fiction includes some "impossible science" - the most common example is faster-than-light spaceships. You just have to accept that and suspend disbelief in order to enjoy the story.<br /><br />Tony Williams: Military gun and ammunition website and discussion forum

 

[enigma10]

Time was invented by man as a means to measure all of the movement of the universe around him. Past, present, and future.<br /><br /> If one wishes to concieve of another way to measure and explain all movement in the universe, down to the sub atomic particales, please, knock yourself out.<br /><br /><i>We use time to measure the past, the present and the future.</i><br />http://simple.wikipedia.org/wiki/Time<br /><br /><i>The scientific definition of a second is 919263177010 vibrations of an atom of Cesium-133. </i><br />http://www.intuitor.com/hex/hexclock.html<br /><br /><i>Time is always changing. Time never stands still. Time is continuous, and not stationary. Time changes our perceptions, and our perceptions of time change continuously. Time is infinite; change is essential to time.</i><br />http://www.angelfire.com/md2/timewarp/time.html<br /><br /> In other words, time exists wether we measure it or not. <div class="Discussion_UserSignature"> <em>"<font color="#333399">An organism at war with itself is a doomed organism." - Carl Sagan</font></em> </div>

 

[qso1]

heat84:<br />Does time really exist? I thought it was just a concept created by us to keep track of our existance.<br /><br />Me:<br />That used to be my impression years ago. But since then, the scientific literature I have seen regarding time indicates its an invention of us humans. I have some difficulty totally agreeing with that.<br /><br />One reason, time dilation when mass is driven to near light speed. If we invented time, how did we make it able to have time dilation as an effect?<br /><br />IMO, time has always existed. Humans have simply developed a way to measure it. The vibration of a cesium atom is just a physical property of that atom we are able to utilize to measure time at the smallest scales. <div class="Discussion_UserSignature"> <p><strong>My borrowed quote for the time being:</strong></p><p><em>There are three kinds of people in life. Those who make it happen, those who watch it happen...and those who do not know what happened.</em></p> </div>