it is currently not feasible for a human to travel one light-year within a human lifetime. The speed of light is approximately 299,792,458 meters per second, which is an incredibly high velocity. Even with the most advanced propulsion systems currently available or proposed, such as ion drives or nuclear propulsion, we are nowhere near achieving speeds close to the speed of light.
At present, our fastest space probes, such as NASA's Voyager 1 and Voyager 2, are traveling at speeds of about 17 kilometers per second (or roughly 0.0057% of the speed of light). At this speed, it would take tens of thousands of years to travel just a single light-year.
Additionally, the energy requirements to accelerate a human spacecraft to relativistic speeds would be enormous, and the engineering challenges associated with protecting astronauts from radiation and other hazards over such long durations would be significant.
However, it's worth noting that scientific and technological advancements continue to occur, and our understanding of physics may change in the future. It's always possible that new discoveries and breakthroughs could lead to novel propulsion methods or space travel concepts that would allow for faster travel. But as of now, the idea of humans traveling one light-year within a reasonable timeframe is purely speculative and far beyond our current capabilities.