The concept that the universe is expanding faster than the speed of light does not violate the principle that nothing can travel faster than light within spacetime. This is because the expansion of the universe is a stretching of space itself rather than objects moving through space.
The expansion of the universe doesn't involve objects moving through space at speeds greater than the speed of light. Instead, it means that the space between distant objects is increasing over time. This expansion is described by the metric expansion of space, a fundamental feature of the Big Bang model.
As for the light from distant galaxies, it's important to note that the expansion of space doesn't carry the light along with it. The light emitted by galaxies travels through space, but the space itself is expanding. This means that the wavelength of the light is also stretched as it travels through expanding space, causing the light to become redshifted.
Even though the space between galaxies is expanding, the light emitted by those galaxies can still reach us. The redshift of the light is taken into account by astronomers when studying distant galaxies, and it provides valuable information about the cosmic expansion and the age of the universe. The redshift of the light is a consequence of the expansion, but it doesn't imply that the galaxies themselves are moving through space faster than the speed of light.
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