U.S. CitiesCity-Data Forum Index
Go Back   City-Data Forum > General Forums > Science and Technology
 [Register]
Please register to participate in our discussions with 2 million other members - it's free and quick! Some forums can only be seen by registered members. After you create your account, you'll be able to customize options and access all our 15,000 new posts/day with fewer ads.
View detailed profile (Advanced) or search
site with Google Custom Search

Search Forums  (Advanced)
 
Old 12-03-2013, 11:24 PM
 
1,669 posts, read 1,076,911 times
Reputation: 2166

Advertisements

this is probably more fiction than science, ever since I saw the time machine(1960) I have had a fascination with time travel, suppose a machine like that can actually be built.
since travelling back in time creates a nightmare of problems lets assume the machine only goes into the future.

1.how fast can it travel?? is a limit to how many seconds/second or hours/hour it can travel?
2. are there parts of time that are more dense,so the machine would travel slower than normal??
3.there would have to be some type of low fuel indicator.right?
4.would you be able to see time ,like a movie going in fast forward?? or would it be a blur??
5. like a plane going faster than sound, would the machine create some type shockwave??
6. it would have to have some type of collision avoidance system.image stopping in the middle of a large rock or having a bird or insect flying by right were you materialize.
7. the machine would have to rotate with the earth. so it would always be on the ground.
8. would it carry spare parts??
9. how would you feel?? people can get air sick and car sick so can you get time travel sick??
10.what type of sound would it make??
Reply With Quote Quick reply to this message

 
Old 12-21-2013, 03:32 AM
 
Location: Wasilla, Alaska
17,850 posts, read 19,682,438 times
Reputation: 6480
Time paradoxes only become an issue when time is viewed linearly, as a straight line. If time were viewed as just one of an infinite number of possibilities (as in M-theory), then all the paradoxes disappear. Just the fact that one traveled back in time would completely alter the timeline from that point forward. It does not matter what one does in the past, just being present in a past time alters the timeline so that the future is no longer what it is suppose to be.

We already have time travel into the future. Albeit by a very modest amount. Speed and time are related. The faster one travels, the slower time becomes. GPS satellites have to speed up their clocks to stay in time with the clocks on the surface of the planet, or they would give bogus locations. The faster one travels, the more time slows down.

For example, lets assume we have this marvelous spacecraft that can accelerate at one gravity the entire trip and cost absolutely nothing in fuel. In such a case, a trip to Alpha Centauri (4.37 light years away), from the perspective of us on Earth, would take 5 years, 10 months, 13 days, and the spacecraft would reach 94.95% the speed of light at the half-way point. From the perspective of those on board the spacecraft, only 3 years, 6 months, and 15 days have elapsed. The astronauts will have effectively traveled forward in time by 2 years, 3 months, and 28 days.

For a more extreme example, if a 26 year old astronaut were to say goodbye to his wife and one year old son before taking a journey on that same spacecraft to Gliese 667C c (22 light years away), reaching 99.67% the speed of light at the half-way point. By the time that astronaut returned to Earth he would be 38 years old, and his son would be 48.

As far as past events are concerned, it would require being able to travel faster than the speed of light. While no object with mass can ever achieve the speed of light within the fabric of space/time, space/time itself is not limited to such restrictions and can expand faster than the speed of light.

If we could somehow open a "wormhole" in the fabric of space/time from Earth to Alpha Centauri, and instantly travel there, we would be arriving in Alpha Centauri's past, as we saw it from Earth 4.37 years ago. What we see now is not where Alpha Centauri is, but rather where it was 4.37 years ago. It has moved in those 4.37 years and the light has not reached us yet.

Last edited by Glitch; 12-21-2013 at 03:50 AM..
Reply With Quote Quick reply to this message
Reply
Please update this thread with any new information or opinions. This open thread is still read by thousands of people, so we encourage all additional points of view.

Quick Reply
Message:

Over $104,000 in prizes was already given out to active posters on our forum and additional giveaways are planned!

Go Back   City-Data Forum > General Forums > Science and Technology
Similar Threads
Follow City-Data.com founder on our Forum or

All times are GMT -6.

© 2005-2018, Advameg, Inc.

City-Data.com - Archive 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35 - Top