If i were travelling on a train going at the speed of light and looking at the window on my right side, photons emitted by objects on the right side of the train would still collide with my retina, causing me to see something, probably a blur or continuous flash because i'm traveling so fast. A more interesting scenario is when the train is travelling in space, with two very big objects on the right side very far away. Here's a picture: Code (Text): [COLOR="White"]....................................................[/COLOR]O |-| |-| |-| |-| [COLOR="DarkGreen"]( ) (x) ( )[/COLOR] |-| |-| |-| |-| [COLOR="White"]....................................................[/COLOR]O Where the train is shown in green, x is were i am, and the Os are the two very large objects. Suppose the Objects have the same size, are as far away from eachother as they are from the rails of the train (this distance being about a light year) and that they are big enough so that to me, sitting in the train, they look like two small moons. The train starts in the middle of the tracks so that in the beginning i see these two objects as being of the same size. If the train starts to move up at the speed of light, with me looking over my shoulder at the two objects, as mentioned above the photons reaching me from these objects would still reach my eyes, though rather than two objects i might just see the line created by the blur of these objects. Finally, suppose i had suffered some brain damage in the optical regions of my brain such that i was only able to see for a very short interval of time T every S seconds. Suppose T is very, very small, and S = 5. Then, every 5 seconds i would have a clearer view of the two objects, in fact, we may say that there is a sufficiently small T such that, every S seconds i would be able to see the two objects very clearly. Under this scenario, even though i am travelling at the speed of light, i would see one of the objects get bigger and the other get smaller, apparently going against the stipulation that time comes to a halt at when you reach the speed of light. Any thoughts on this? EDIT: Even if i hadn't the brain damage, assuming the two objects are the only visible ones on the side of the train, would they be blurred at all?