Step 5: Through trial and error, determine the minimum initial velocity that will allow the planet to orbit the yellow Sun. From your previous investigations, you know a speed of ED is too small and an initial speed of 9.0 is more than enough. So your result will be between 5.0 and 9.0. Don't worry if the animation shows the planet moving through the Sun. What is the minimum initial velocity that will allow the planet to orbit the without crashing"? Step ?: Through trial and error, determine the correct initial velocity [to the tenths place) that will allow the planet to orbit the sun in a circular orbit. If the initial speed is too high or too low, the orbit will be elliptical. What speed is just right to allow a circular orbit? It may be a bit tricky to determine if the orbit is exactly circular without a grid, but the readings for potential energy, kinetic energy, and rotational momentum will help. Since a circular orbit is a constant distance from the star and has a constant speed, none of these values will change. If the orbit is circular, the energy graphs will be straight lines and the rotational momentum value (rpi will not change