Iâve come up with fewer reasons for giving a child a cell phone earlier, but at least two of them are enough to offset a multitude of others. Keeping tabs on them. As each year passes in a childâs life they venture farther from home and for longer periods of time.
Like the inner planets, the outer planets have similar characteristics to one another. The outer planets are so much larger than the inner planets that they make up 99 percent of the mass of the celestial bodies that orbit the Sun. Although mainly composed of gas, the outer planets also have other ingredients.
It isn't that the outer planets are made out of just gas. They have rocky cores just like the ones inside the inner planets. Gas is not very dense when it is in the form of huge shapeless clouds floating around a sun. Solar winds easily push the particles of gas farther out into space.herefore, the inner planets are composed of rock and metal. However, by the time the wind hit the outer planets it became weaker and the gravitational attraction of the rocky protoplanets was strong enough to hold on to the lighter elements. 6 people found this useful.