The first four planets are [[terrestrial planet]]s, 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 planet]]s, 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. |