# Can you travel in time?

###### Wiki User

###### 2015-01-01 13:26:37

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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