Time Travel?

Question

When will time travel become possible? Will it be possible to travel freely to the past, or future, or will travel only be possible to the future? Could this be why no one has traveled back yet? What are the current obstacles to time travel?

Answer 1

We know from Relativity Theory that as we approach the speed of light, time slows down.

So theorectically, if we travel in a spaceship that travel close to the speed of light away from earth and return in one hour, time on earth would have passed like 1 million years into the future. Thus we sort of have "travelled into the future".

Now to travel into the past, we have to travel at the speed BEYOND the speed of light, where time would start to reverse.

So far , there is no technology or resources that can build and power a spaceship that can travel close to a fraction of the speed of light !

However , what may be impossible now will be possible in the future. In the past, there were "short-sighted" scientists who thought it was impossible to travel faster than 30 mph or that moon landing was impossible or even that "virgin birth" was ridiculous.

Well, we built flying machines that can fly at 25 times the speed of sound like hyperdrive jets . We proved that man can land on the moon and we sent robots onto the soil of mars. We proved through Dolly the sheep that sperms are not needed to clone an animal.Thus resulting in virgin birth.

We currently only know a tiny fraction of all the sciences and technologies of the universe. As we gain more knowledge and developed more technologies, what that was impossible will be theorectically-possible and what that is theorectically-possible would be technologically-possible and finally economically-viable and be mass-produced.

The argument that no one from the future even come to visit us proves that time travel is impossible - well, i would think that if time travel is possible in future. it's probably a controlled thing like nuke bombs because altering history would have a great impact on the future. Perhaps there are covert time-travelling that caused so many UFO sightings , Aliens landings , Religious manifestations, Ship Disappearances , miraculous events that cannot be explained or proven.

Let me quote this :

"In the long run , NOTHING is impossible."

Answer 2

Theoretically anything is possible but the fact is we don't have the technology nor are we an advanced enough society to build a spaceship that could reach the speed of light or create wormholes or collapse stars or any of the other stuff that could make time travel possible. Plus, if you went back in time and you didn't exist yet you might breathe a bit of air that a butterfly needed to breathe and that might upset the ecosystem for the future. Sounds crazy but you never know. If you went into the future, even something like 50 years, a good deal of your friends/relatives might be dead, your money would most likely not be worth much, and you might not be able to cope with how overwhelming all that would be. If you went 1,000,000,000 years in the future who knows if the earth will even be habitable for the human race?

One of my favorite crackpot theories has to do with time travel. You know those little gray aliens with the huge black eyes that everyone claims to have seen? One theory is that those aliens are actually us from the future. The gray skin and huge eyes are there because the earth has gotten so much hotter over time and that's how we evolved to cope with it. The gray skin to deal with the heat and the large eyes to take in all the extra light from the sun which will eventually expand to the point where it will basically swallow the earth whole. Problem is we've become sterile and need to re-populate our race. By this point we have perfected time travel (hence U.F.Os) and are going to try and artificially inseminate earthlings from the past (hence the "experiments").

So, long story short, time travel probably ain't gonna happen in our lifetimes.

Answer 3

I really don't know that much about time travel. But what I think about it is that is time travel is possible, then how do we know that we aren't really in the past? Because if you really think about it then the past could be happening and the future could be happening as you read this. We could actually be in the past already. The present wouldn't be right this second, it would have already passed this year or maybe even the century. There is no real way to be sure that time travel is or ins't possible. We could all be in the future for all we know. The government already keeps secrets from us. It wouldn't shock me that they have already figured this out and kept us from knowing. Think about it.

Answer 4

Its possible to travel in time to the future, as the faster you go the more you move into the future, but time travel to the past is believed to be impossible due to the amount of paradoxes it would create. However there are theoretical particles called tachyons that if they were proven to exist would travel so fast that they'd actually travel faster than light and backwards in time. Also, time slows down when inside a gravitational field so we could use say, a black hole, to travel in time to the future. Humans will probably never be able to posses the technology to be able to reach the speeds to travel to the future and as time travel to the past would be impossible (unless the multiverse theory is proven correct) so one day we might be able to time travel but it will be no day soon and will not be easy. Hope this helped :)

Answer 5

Perhaps in the future within 500 years if Humans survive eather by man made disaster or global warming.. Unlike in the movie "Back to the Future", if you went back in time and prevented your parents from meeting and ever having children you would not disappear into thin air. You will still be alive but when you return to your current time you would have never existed and no records of you being alive would not be in file. No one would know you. Time is in dimensions only. The answer to this question is how to get to those dimensions in the future. These dimensions also include alternate universes which could be dangerous to future time travelers.

Answer 6

Time travel to the past is not necessarily impossible (given more powerful technology), but even if you were able to travel backwards in time, you'd only be able to go back to the time you built your time machine.

However, you can theoretically travel into the future if you could travel as fast as or faster than the speed of light. You will have aged little, and everything around you (assuming you come back to earth) would have aged a million-fold.

Answer 7

Definitely time travel is possible. Time travel would be connected with speed of light. In my opinion the day one can exceed the speed of light then traveling forwards and backwards will be possible. One would also need to know the exact position of an object relative to the entire universe.

mpmk

Answer 8

Well we currently only know how to travel forward in time, which can be done by moving incredibly fast, almost the speed of light. Time travel is tough because we weren't designed to travel throughout four dimensions, only 3. It's just not how our universe was created. And that's why time seems like such a vague idea to us.

Answer 9

Time travelling is a very difficult topic.

You can supposedly travel into the past if you travel faster than the speed of light but this involves getting a source of infinite energy as when matter gets closer and closer to the speed of light its mass will dramatically increase.

This is said to be very unlikely but general relativity says it may be possible on highly unusual circumstances.

Wormholes, permitted by general relativity, could be possible only if it is traversable.

If you read general relativity and objects at speed of light you get time, space and gravity based dilations where light appears to be bent by gravity and arrives at an object at different times.

Yet again the object has to be travelling at 0.99c or faster!!

Hyperspace travel will most likely come into play with time travel. Currently scientists are working on an idea using electromagetic and other forms to increase the dimension to 8D. This i think will surely add to time travel.

Answer 10

Just a simple reflection. We all are made of atoms which were attributed to other objects in the past.
Is it possible to double matter? What will be the consequences?
If you travel in the future by time dilation, you take "your" matter with you, but it will be a one-way ticket.
I don't believe that a deplacement of matter to the past is possible.