why do you think the inner planets are small and dense
The planets closest to the Sun, (Mercury, Venus, Earth and Mars) are called the terrestrial planets. They are small, dense, rocky planets. The outer planets (Jupiter, Saturn, Uranus and Neptune) are called the Jovian Planets. They are large and made up of gas.he planets closest to the Sun, (Mercury, Venus, Earth and Mars) are called the terrestrial planets. They are small, dense, rocky planets. The outer planets (Jupiter, Saturn, Uranus and Neptune) are called the Jovian Planets. They are large and made up of gas.