Earth's neighboring galaxy, the Andromeda Galaxy, is a distance of 2.54 × 10 7 2.54×107 light-years from Earth. If the lifetime of a human is taken to be 80.0 80.0 years, a spaceship would need to achieve some minimum speed v min vmin to deliver a living human being to this galaxy. How close to the speed of light would this minimum speed be? Express your answer as the difference between v min vmin and the speed of light c c .