Essay. Process what you know. Explain the following briefly. 1. Based on what you have learned about the planets in the solar system, which seems most similar to Earth? 2. What are the differences between the inner planets and the outer planets? 3. The planets are kept in orbit as they revolve around the sun because of its gravitational pull. Considering that this is true, why do you think the moons that revolves around many of the planets in the solar system don't revolve the sun instead?​