Can you travel in time

Answer 1

Time Travel is a Science Fiction concept, outside the confines of a traditional fourth dimensional SpaceTime frame of reference. The basis for the concept of Time Travel comes in a number of forms. The most common basis for Time Travel is the caricatural notions of a Past, Present, and Future within SpaceTime. Since Time is affected by any change in the Space (or consequently by any change in the SpaceTime continuum), then Present Time is considered to be a static snapshot of a singular SpaceTime event that defines the existence of our reality. That is to say, both Past Time and Future Time are outside the realm of the existence that defines our reality. Each Present Time event predetermines the next Present Time event. This predetermination is a result of cause and effect; i.e. each Present Time event (or current SpaceTime configuration) has a characteristic potential (or momentum) for its next Present Time event (or next SpaceTime configuration).

Another basis for Time Travel is the relativistic notion of Special Relativity, whereupon a positive mass is accelerated and its measure of Time is warped by its distorted Space.; i.e. the greater the positive mass density, the slower the measure of Time. This has been demonstrated via atomic clocks at varying ranges of gravitational acceleration; i.e. the greater the mass, the slower the rate of time as recoded on the clock. Ergo, the rate of time on Jupiter is slower than the rate of time on Earth. From this postulate, it has been mathematically presented that by increasing the rate of acceleration, the measure of Time can be stopped; i.e. the hypothetical gravitational singularity of a black hole would cause the rate of measure time to stop. Unfortunately, this notion of Time Travel is an illusion of time dilation aging; i.e. the time traveler can only exist in Present Time event, but is expected to be still younger than those not affected by time dilation. This is all still theoretical, as the concept of decreasing acceleration (from a time dilated state due to increased acceleration) has no comparable hypothesis, leading some scientist to believe that time dilation would balance out.

Note: Time Dilation, via the theory of general relativity, is an actual difference of elapsed time between two events as measured by observers either moving relative to each other or differently situated from gravitational masses. To simplify, velocity and gravity each slow down time as they increase. Velocity has increased for the astronauts, slowing down their time, whereas gravity has decreased, speeding up time (the astronauts are experiencing less gravity than on Earth).

In physics, the twin paradox predicts the effect employed by the general theory of relativity. If one of a pair of twins remains on earth, and the other travels in a rocket at a speed near the speed of light, the traveling twin will be younger than the earthbound twin upon returning to Earth. This effect has been verified experimentally by measurements with atomic clocks.

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The answer above hints at a fantastic and wonderful plan:

Let's assume that you are physically, mentally, and genetically prepared to live,

let's just say, to the age of 75 years.

Now, if you could just get to Mars somehow, where the year is almost twice as

long as the year on Earth, then you would live almost twice as long there before

you turned 75.

I say let's get NASA funded again and let's give it a go !

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no. Not actually. Travelling in time is not actually travelling from 2012 to 2013 or 2011.

The time may not be the same at all parts of the universe. You are calling 365 days

as 1 year depending on the rotations of earth. So if you spend time in some other

part of the universe and come back after some years, you may look younger or

older than expected. Your friends may feel that you travelled in time. But its not

like you can go back and see Albert Einstein or enter the future to see your grand

grand children.

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Answer 2

Unfortunately all types of reverse time travel are theoretically impossible. However, due to Einsteins theory of relativity, if a being can find a way to safely travel at almost the speed of light they can exponentially slow down time, increase mass, and increase length. Again, it is unfortunate that this is not possible with current technology.