What is Time Dilation ?

When the twin returns he or she will have aged only a little compared to the Earth-bound twin (whose clock has been running "normally").

As an illustration of time dilation we can look to a group of people whose job it is to spend their time smashing very small particles together to see what happens.

These people are called particle (or high energy) physicists. For these scientists relativity is a routine part of their job

and indeed would be difficult if not impossible without it. The particles they smash apart are stuck very tightly together, and so need an immense amount of energy to break them.

One way (but not the only way) to give the particles sufficient energy is to move them very quickly in large magnetic rings called particle accelerators.

This research is considered so important that all of the major countries of the world have access to such machines

Many of the experiments would be over much more quickly if it wasn't for the fact that, because of the very high speeds involved and special relativity, the internal "clocks" of the particles are greatly slowed down.

For example, when two particles, such as atoms, are smashed into each other at very high speeds they sometimes momentarily stick together to form a new particle.

Most of these heavier particles promptly fall apart with very short time frames, sometimes within only a trillionth of a second.

By speeding the process up not only is it possible to impart enough energy to the original particles to actually combine them, but the resulting, heavier, particle "lives" longer, in exact accordance with how special relativity says it should at the speed it's moving.

Special relativity indicates that, for an observer in an inertial frame of reference, a clock that is moving relative to him will be measured to tick slower than a clock that is at rest in his frame of reference. This case is sometimes called special relativistic time dilation.

Gravity affects the passage of time. You can practically stop yourself from aging when passing by a high gravitational field or age faster when passing a weak gravitational field.

All the moments of time whether past, present or future are happening at the same time. I suggest you to watch the following video to get a better understanding of this point.

Einstein’s theory of relativity is the closes thing we have to time travel. It allows the movements in space to alter the time flow.

Time dilation it’s one of earliest forms for relativity. This is allowed by the laws of physics but you can only go into the future.

Time dilation is the idea that when you go up in space you come back to earth younger than you would have been if you had stayed on earth.

Time dilation moves at the speed of light and moving at the speed of light makes you travel faster into the future. But there’s a problem with this type of time travel is you would have to make a ship that goes fast enough.

Scientist hasn’t found a way to make a spaceship go as fast as the speed of light. One reason you can’t go the speed of light is if you make an object go at high speeds its mass increases, and it takes more energy to keep it moving that faster.

The formula for mass to increase is almost the same formula for time dilation.

when you get closer to a black hole gravity warps space its self and time slows down.

Einstein’s theory of relativity is the closes thing we have to time travel. It allows the movements in space to alter the time flow.

Time dilation it’s one of earliest forms for relativity. This is allowed by the laws of physics but you can only go into the future.

The idea behind time dilation is just as you describe, where your perception of time is dependent on how fast you’re going, or how close to a very large object you are.

Time dilation is the idea that when you go up in space you come back to earth younger than you would have been if you had stayed on earth.

Interstellar actually did a remarkably good job of discussing time dilation in general, especially given how counter-intuitive ideas to do with relativity can be.