II. Complete each statement by choosing the correct answer in the parenthesis. Encircle the correct answer inside the parenthesis. 1. The (gases/gravity) keeps the celestial bodies of the Solar System in their orbit as they revolve around the Sun. 2. The (moon, Sun) is a natural satellite revolving around a planet, such as Luna revolving around the Earth 3. Mercury, Venus, Earth, and Mars are (inner, outer) planets, which are the first four planets near the Sun 4. Jupiter, Saturn, Uranus, and Neptune are the (inner, outer) planets that are farther from the Sun.​