Part 2: Revolution of objects in our solar system. Copy and paste into your browser: htt s:/ het.coIorado.edu/sims/htm|/ ravi -and-orbits/Iatest/ ravi -and-orbits en.html 1. Select \"Model". Choose the Sun and Earth system to start as shown below. Check the \"path" box and select gravity \"on\". 2. Start the Earth in orbit by hitting the play button. 3. Notice that the orbit is nearly circular. How many days it takes to make one orbit of the Sun (1 year)? 4. Hit the orange reset button. 5. Start the Earth in orbit again. As it is moving turn gravity off. What happens to the Earth? 6. Therefore, the force of gravity must act in which direction