Rocky planets, also known as terrestrial planets, are primarily composed of solid surfaces and are found in the inner part of the solar system. These planets include Mercury, Venus, Earth, and Mars, each exhibiting unique geological features and atmospheres. Their solid crusts are made up of rocks and metals, distinguishing them from gas giants like Jupiter and Saturn. The characteristics of rocky planets make them fascinating subjects of study in planetary science. They have varied landscapes, including mountains, valleys, and craters, and some, like Earth, support life. Understanding these planets helps scientists learn about the formation of our solar system and the potential for life beyond our planet.