I would like to preface this idea by stating that I am a total noob and in no way have any right to be here haha. I was just watching a show on the science channel "Carl Sagan's Cosmos". I am an avid viewer of basically anything on TV about the universe or physics in general. I find everything about it completely fascinating. Anyways, In this show Carl sagan talked about the Time Dilation phenomenon and its impact on travel at the speed of light. It got me thinking about if a human were to travel at that speed, lets say to a star 50 lightyears away. He stated that it would take that individual 50 years to reach his destination but due to time dilation, those on earth would experience some thousand years of time because of this. I am wondering how communication between earth and the traveler would be possible with someone traveling at speeds approaching lightspeed. Obviously verbal communication would be impossible due to the vast differences in speed between sound and light. However, i may be incorrect, but i believe that thoughts themselves occur at a speed much faster than sound. So my thinking is this: If a human's brain who is travelling at speed approaching the speed of light were to be connected to a device which translated thought and converted it into laser flickers or something of the sort and it was pointed at the earth. Then the travellers thoughts could be used as a communication medium, but even moreso the communication process would occur in direct opposition to the time dilation phenomenon because it would not take earth the same thousands of years to receive the communication from the traveler. Am i making sense? is this possible? If an object travelling from one point to another at the speed of light were itself to broadcast light back to its origin would time dilation apply? Confusing, but interesting... am i completely assinine in making these statements, or proposing these questions? Can someone explain to me what they believe the outcome would be? I'm very interested to hear what a professional's opinion on this is.