Yet another faster-than-the-speed-of-light phenomenon is the speed with which galaxies can recede from each other as a result of the expansion of the universe. If the distance between two galaxies is greater than what is called the Hubble distance, then these galaxies are receding from one another at faster than the speed of light.82 This does not violate Einstein’s special theory of relativity, because this velocity is caused by space itself expanding rather than the galaxies moving through space. However, it also doesn’t help us transmit information at speeds faster than the speed of light.
