The Parker Solar Probe is on its way to the Sun. It is the fastest vehicle humans have built. It will reach a speed of 4.3 x 10^5 miles per hour. At that speed how long would it take to reach the center of our galaxy? Assume straight-line flight from Earth. The earth is 2.5 x 10^4 light years from the center of the Milky Way galaxy. A light year is 5.879 x 10^12 miles. A year is 365.25 days.