Traveling at 0.16 times the speed of light (0.16c), it would take approximately 25 years to cover a distance of 4 light years. This is derived from the formula time = distance/speed, where distance is 4 light years and speed is 0.16 light years per year. In contrast, traveling at 0.16 miles per hour would take 25 hours to cover 4 miles, using the same speed-distance-time relationship. Both scenarios illustrate how speed significantly impacts travel time over vast distances. Understanding these calculations is essential for grasping concepts in astrophysics and space travel.