The first four planets are [[terrestrial planets]], the last 4 planets are [[jovian planets]]. Terrestrial planets are small in size, have high densities, and consist of rocky materials. Jovian planets are large in size, have low densities, and consist of gaseous materials. | The first four planets are [[terrestrial planets]], the last 4 planets are [[jovian planets]]. Terrestrial planets are small in size, have high densities, and consist of rocky materials. Jovian planets are large in size, have low densities, and consist of gaseous materials. |