A Martian leaves Mars in a spaceship that is heading to Venus. On the way, the spaceship passes earth by a speed v = 0.86c relative to it. Suppose that the three planets do not move relative to each other through the trip. The distance among Mars and Venus is 1.20× 1011 m, as measured by a person on earth.
a) What does the Martian measure for the distance between Venus and Mars?
b) What is the time of the trip (in seconds) because measured by the Martian?