Can you ever travel through time

The answer to this is not simple as the question might sound.Now lets talk about what do you mean by time travel.
If your answer is to view things that have happened in the past. Then Yes, definitely you can travel through time!
If your answer is to view your future. Then No, definitely you cannot travel through time.
If your answer is can I change my past.Then No,you cannot travel through time.

Lets see how it is possible to view the past and not the future.

Speed of light as simple the term seems it is the physical barrier which controls what we see.
Lets look at this in a different way.Light from sun takes 8 minutes to travel from sun to earth.What this means is that, the sun that you are looking at now is actually the sun before 8 minutes because light took 8 minutes to travel the distance between sun and earth. So you can say that you are actually looking the past time of the sun.

The same distance lets say we travel in a different direction(not towards sun) and stay there observing the earth.Lets say we are a position called 'Omega'.Light from earth would reach us after 8 minutes.So the things happening on earth we are seeing after 8 minutes.They are not the current things happening on earth.But for us (at Omega)we feel like that is the current time.

Now see what happens when we travel 4 times faster than light.We would reach omega in our dream vehicle in 2 minutes.Now as we look towards earth we see ourselves on earth 6 minutes earlier making preparations to travel to Omega. But this is not the only thing we see!! We would also see our selves 2 light minutes away from Omega and between earth.(This I would call it as Travel Image) .

None of the things we see we can change because of the distances involved.

so we go as far as the distance of sun we can see few minutes away...If we travel the distance of the nearest star we might see what happened a few years before. The problems involved would be to have a telescope so big to look at the light sent out by the thing you want to observe and the aberration created by the Travel Image rather Travel Images.