What does it mean: "if we left today we could only reach one third of it"?
I couldn't find a the limiting factor... The stars would be dead before we arrived? My best guess. Of course, the qualification would be that we continue to be bound to the speed of light maximum.
I couldn't find a the limiting factor... The stars would be dead before we arrived? My best guess. Of course, the qualification would be that we continue to be bound to the speed of light maximum.