Shrink the solar system down to about two inches. Light still takes about eight hours to go from one end of it to another, meaning any speed we have even a theoretical ability to attain is more comparable to the speed at which a plant grows than to the speed at which any animal travels, even ants.
In shrinking the solar system to a fit-in-your-palm size, however, you’ve only shrunk our galaxy down to the size of North America. This means that when we imagine some space craft designed to travel from one part of just our galaxy to another, we’re imagining something comparable to a farmer in Nebraska speaking of a plant that he’s growing to New York. The plant, to be sure, might be growing westward, and it might even close the gap a few inches over the course of its season, but one can only speak of it traveling to New York with an ironic smile.
Just Thomism 