Please help me understand this… Lets say that we have invented a space ship that travels at the speed of light… We also invent a transmitter that uses tachyons or some other technology that allows realtime communication between Earth and the ship. The ship travels away from the Earth at the speed of light. On Earth we use the transmitter to broadcast a 24/7 radio station and every hour, the "Earth" date/time is broadcasted. I have heard a theory that a ship traveling at light speed for 14 years (to reach the nearest star outside of our solar system) and then returning back to Earth another 14 years later, would arive to an Earth that is 50,000 years older but for those on the ship, only 28 years would have passed. The radio broadcast date and time would only reveal that 28 years had passed correct? All this assumes no wormholes were used of course.
