Which type of planets are known as terrestrial planets?

Terrestrial planets are classified as the inner planets in our solar system. These planets—Mercury, Venus, Earth, and Mars—are characterized by their solid, rocky surfaces, as opposed to gas giants, which lack a well-defined solid surface. The term "terrestrial" itself derives from the Latin word "terra," meaning "Earth," emphasizing the Earth-like qualities of these planets.

Terrestrial planets are generally smaller and denser than their Jovian counterparts, and they have a variety of geological features such as mountains, craters, and valleys. Their proximity to the sun results in higher temperatures, leading to atmospheres that can be thin or even nearly absent in some cases, like Mercury. The classification of terrestrial planets is essential when studying planetary science because it influences their formation, composition, and the potential for hosting life.

Understanding this categorization helps clarify the differences in the characteristics of planets in our solar system and informs discussions about planetary systems beyond our own.