Time Travel

[kyle]

I'm posting this because hopefully, people will discuss stuff about time travel. I think time travel is not possible and even in the event that someone does make it possible it will rip a hole in the universe, causing life as we know it to cease to exist. But that's my take on it, I want to hear what other people have to say about it.

[packajos000]

[packajos000]

[Koguntetsu]

Greetings and welcome, Kyle. I would like to present you with this piece of evidence that has been proven time and time again using atomic clocks and commercial airplanes, to sending the clocks into space and orbiting the earth before returning and calculating how much if any time is different. It is called "Time dilation."

https://www.youtube.com/watch?v=n2s1-RHuljo

Now as far as travelling backwards in time, I feel that it would be quite a difficult if not impossible thing to accomplish. Now what if we were to accomplish quantum tunneling? The closer you get to the speed of light the more time slows down and there have been studies that suggest that quantum tunneling is almost instantaneous.

(see https://newatlas.com/time-electron-quan ... ing/50784/ )

If we were able to create a machine that was able to perform quantum tunneling, i feel that "time travel" would be a very possible accomplishment, but only going forward in time.

[Nazheek]

According to modern quantum theory, it is possible travel *further* in time, by breaking lightspeed. Indeed, time dilation has occurred among humans, albeit on marginal intervals: technically meaning time travelers are already amongst us.

[Absconditus]

Time is an illusion dependent on point and position of reference. Any meaningful forward or backward change in point and position of reference would instantly alter the probability line of the participant and a new creode is established. Physicality disrupts the existing and observed probability line and that creode is irrevocably altered or destroyed.
Only by projecting the consciousness of an observer forward or backward into another 'vessel' can this be avoided. Thus another point on a line of probability can be perceived and observed without generating a branching creode.

[Redbeck]

Dear Kyle welcome to the Oracle Forum community and thank you for such a reason, reflection and debate provoking initial question. Also a similar warm OFC welcome and thanks to Absconditus for an erudite commentary in response. And not forgetting of course our ever prolific comrades in the great battle for humanity, Packajos000, Koguntetsu and Nazheek, all of whom have put their forward their perceptions on the subject of time travel.

And that said, rather than remaining a pure master of ceremonies, I shall endeavour to add my gathered acorns to the conversation, as I feel that there are more flames to fan from what are glowing embers of subjective discourse at the moment. This is progressive by the way, so there is more to add from the old man's hat. Redbeck.



Time travel, moving between different points in time, has proved a popular topic within the science fiction genre for decades.Take The Time Machine, a science fiction novella by H. G. Wells, published in 1895 and written as a frame narrative. The work is generally credited with the popularisation of the concept of time travel by using a vehicle that allows an operator to travel both with a distinct objective and selectively forwards or backwards in time.

So what is time? While most people think of time as a constant, physicist Albert Einstein demonstrated that time is an illusion; it is relative, therefore it can vary for different observers depending on their speed through space. Sitting in Einstein's mind, time is the 'fourth dimension.' Space is described as a three-dimensional arena, which provides a traveller with coordinates, for instance length, width and height which show location. Time provides another coordinate, that is direction, although according to convention, it only moves forward.

Conversely, there is a new theory which asserts that time is 'real.'

Einstein's theory of special relativity says that time slows down or speeds up depending on how fast you move relative to something else. At approaching the speed of light, a human inside a spaceship would age much mor slowly than their twin at home. Also, under Einstein's theory of general relativity, gravity can bend time.

Picturing a four-dimensional fabric called space-time, not so easy but worth a try. When anything that physically has mass settles on that piece of fabric, it causes a dimple or a bending of space-time. The bending of space-time causes objects to move along a curved path and that curvature of space is what we know as gravity.

Both the general and special relativity theories have been proven with GPS satellite technology that employs very accurate onboard timepieces. The effects of gravity, as well as the satellites' increased speed above the Earth relative to observers on the ground, make the unadjusted clocks gain 38 microseconds a day. (Managing engineers effect calibrations to account for the difference.)

In a sense, this effect, known as time dilation, dictates that astronauts are time travellers, as they return to Earth minutely younger than their identical twins that remain on the planet.

General relativity also provides scenarios that could allow travellers to go back in time, according to NASA. Although the equations might be difficult to physically achieve.

One possibility could be to go faster than light, which travels at 186,282 miles per second (299,792 kilometres per second) in a vacuum. Einstein's equations, though, show that an object at the speed of light would have both infinite mass and a length of 0. This appears to be physically impossible, although some scientists have extrapolated his equations and categorically said it might be done.

Through the wormhole. A linked possibility, stated by NASA, would be to create 'wormholes' between points in space-time. While Einstein's equations provide for them, they would collapse very quickly and only be suitable for the passage of very small particles. Also, to my knowledge scientists haven't actually observed these wormholes in practice yet and the truth is the technology needed to create a wormhole is far beyond anything we have today.

Thus Einstein's theories present a number of difficulties in terms of making time travel a reality, however there are some other groups who have proposed alternate solutions to enable leaps back and forth in time.

One of these is known as the infinite cylinder. Astronomer Frank Tipler has proposed a mechanism (sometimes referred to as a Tipler Cylinder) which works on the priciple of gathering matter that is 10 times the sun's mass, then rolling it into very long but very dense cylinder.

After spinning this cylinder up to a few billion revolutions per minute, a nearby spaceship following a very precise spiral around this cylinder could lock itself onto a 'closed, time-like curve', according to the Anderson Institute. Obviously there are many including myself, who are convinced that there are distinct limitations to this method, including the fact that the cylinder needs to be infinitely long for this approach to have any chance of working.

Another possibility would be to move a spaceship rapidly around a black hole, or to artificially create that condition with a huge, rotating structure.

'Around and around they'd go, experiencing just half the time of everyone far away from the black hole. The ship and its crew would be traveling through time,' physicist Stephen Hawking wrote in 2010.

'Imagine they circled the black hole for five of their years. Ten years would pass elsewhere. When they got home, everyone on Earth would have aged five years more than they had.'

However, Hawking added, the crew would need to travel around the speed of light for this to work. Meanwhile, physicist Amos Iron at the Technion-Israel Institute of Technology in Haifa, Israel pointed out another obstacle, as if a human made machine were used, it might well fall apart before it reached the required rotation speeds.

Cosmic strings. Another theory for potential time travellers involves a phenomenon called cosmic strings. These are narrow tubes of energy stretched across the entire length of the ever-expanding universe. Thin regions, left overs from the early cosmos, which are predicted to contain huge amounts of mass and therefore could likely warp the space-time around them.

Cosmic strings are either infinite or they exist in loops, therefore no ends, scientists say. The approach of two such strings parallel to each other would bend space-time so vigorously and potentially in an appropriately particular configuration that might make time travel possible, in theory that is.

All implying huge advances in harnessing technology before humans get even close to the holy grail of time travel. Also, humans may not be able to withstand time travel at all, for travelling nearly the speed of light would require a centrifuge, but that would be lethal as would using gravity, standing on a neutron star to experience time dilation would rip the body asunder. According to professor of physics, Tollaksen at Chapman University, California.