According to our current understanding of physics, the expansion of the universe does not violate the principle that nothing can travel faster than the speed of light (c) within spacetime. The expansion of the universe is a property of the fabric of spacetime itself, rather than objects moving through it.
The idea that the universe is expanding faster than the speed of light is a common misconception. It is important to note that the expansion of the universe does not involve objects moving through space but rather the stretching of spacetime itself. The rate of expansion is measured by a parameter called the Hubble constant, denoted by Hâ‚€.
The Hubble constant determines the speed at which two points in space, sufficiently far apart, are moving away from each other due to the expansion of the universe. The value of the Hubble constant is currently estimated to be around 70 kilometers per second per megaparsec (km/s/Mpc). This means that for every megaparsec (a unit of distance), the space between two points will appear to increase by 70 kilometers per second.
However, it is important to understand that the expansion of the universe does not limit the speed at which objects within the universe can move relative to each other on smaller scales. On local scales, objects can move away from each other or approach each other at speeds greater than the speed of light, but this does not violate the fundamental principle that no object or information can travel through spacetime faster than light.
In other words, while the universe is expanding, the expansion itself is not governed by the laws of special relativity, which restrict the motion of objects within spacetime to speeds at or below the speed of light. The expansion of the universe is a consequence of the general theory of relativity, which describes the behavior of spacetime on large scales.