I can see through the straw's tip, once upon a time

Several centuries have passed since humanity obtained warp technology and expanded into outer space. A miraculous pathway discovered by a certain astronomer. What was named the "Straw Path" is something that stretches thinner and thinner, like threading a needle, carrying memories of the past. Those who believed it left behind a certain kind of treasure dispatched an observation team. What did they see, and what did they wish to see...?