there are currently no feasible technologies that would allow humans to travel one light-year within a human lifespan.
A light-year is the distance that light travels in one year, approximately 9.46 trillion kilometers (5.88 trillion miles). Our current fastest spacecraft, such as the Voyager 1 probe, have been traveling for several decades and have only reached a small fraction of a light-year.
The main challenge in interstellar travel is the enormous distances involved. The nearest star system to our solar system, Alpha Centauri, is about 4.37 light-years away. The vast distances, combined with the limitations of our current propulsion systems, make it impractical for humans to travel such distances within a reasonable timeframe.
However, it's worth noting that scientific and technological advancements can lead to new possibilities in the future. Concepts such as advanced propulsion systems, such as fusion or antimatter engines, as well as theoretical concepts like warp drives or wormholes, have been proposed in science fiction and theoretical physics. However, these ideas are highly speculative and far from practical implementation at this time.
While it's challenging to predict the future, it is currently unknown if or when humans will develop the capability to travel one light-year. It may require significant breakthroughs in physics and engineering that are beyond our current understanding.