The expansion of the universe can be a counterintuitive concept to grasp, but it does not contradict the fact that we observe distant objects moving away from us. The key to understanding this lies in the concept of the expansion of space itself.
The universe is expanding, which means that the distance between galaxies is increasing over time. This expansion is not caused by galaxies simply moving away from each other within a preexisting space. Instead, it is the fabric of space itself that is expanding. To illustrate this, imagine a balloon being inflated. As the balloon expands, all the dots on its surface move away from each other, even though no dot is actively moving away from another.
Similarly, in the case of the universe, all galaxies are effectively stationary within their local regions of space. However, as space expands, the amount of space between any two galaxies also increases. This expansion leads to the observed phenomenon known as the Hubble flow, where galaxies appear to be moving away from each other.
It's important to note that the expansion of the universe does not violate the laws of physics or our understanding of motion. The expansion is a fundamental property of the universe, supported by substantial observational evidence such as the redshift of distant galaxies.