One of the most limiting constants of modern physics is the speed of light. It implies that we cannot transfer information to astronauts visiting the nearest star, Proxima Centauri, in less than 4.25 years.

Despite wishful thinking, quantum entanglement cannot transfer messages faster than light. Indeed, a measurement of an entangled quantum system at one location would affect its measurement at another location at a speed that is faster than light, but there is no transfer of an intentional message through these two measurements.