Galaxies beyond a certain distance from us are indeed moving away faster than the speed of light, but this does not violate the theory of relativity. The expansion of the universe is a special case where the fabric of space itself is expanding, carrying galaxies along with it. This expansion does not require the galaxies themselves to be moving faster than light relative to their local space.

The expansion of the universe is described by Hubble's law, which states that the velocity of a galaxy is proportional to its distance from us. This means that the farther away a galaxy is, the faster it is moving away. The constant of proportionality in Hubble's law is known as the Hubble constant, and its current value is estimated to be around 70 kilometers per second per megaparsec.

According to Hubble's law, galaxies that are sufficiently far away from us will have a velocity greater than the speed of light. However, it is important to remember that this is a peculiar velocity due to the expansion of space itself, not the galaxies moving through space at faster-than-light speeds.

In summary, galaxies appear to be moving away faster than light due to the expansion of the universe, but they are not actually traveling faster than light relative to their local space.