Planet Gliese 876c takes 0.082 yKepler's 2nd Law AND Gravitational Force: at different positions in its orbit, the blue triangles on the diagram show that a planet covers equal areas in the same amount of time. So, as the planet gets closer to it sun, the gravitational force changes and causes the planet to move to orbit the star Gliese 876. Planet Gliese 876c’s orbit has a semimajor axis of 0.136 AU. What is the value of k according to Kepler’s third law,