Kiviplaneetat

Kiviplaneetat, also known as terrestrial planets or rocky planets, are a class of exoplanets composed primarily of silicate rocks or metals. Our own solar system features four such planets: Mercury, Venus, Earth, and Mars. These planets are characterized by their solid surfaces, relatively small size, and high density compared to gas giants. Their formation is believed to have occurred in the inner, hotter regions of protoplanetary disks, where lighter elements like hydrogen and helium were mostly blown away by stellar winds. The composition of a Kiviplaneetta is dominated by heavier elements that could condense at these higher temperatures. They possess a metallic core, often iron-rich, surrounded by a silicate mantle and crust. The presence of an atmosphere, if any, varies greatly between Kiviplaneetat, influenced by factors such as planetary mass, volcanic activity, and proximity to their host star. The study of Kiviplaneetat, both within and beyond our solar system, is crucial for understanding planetary formation and the potential for life elsewhere in the universe. Discovering and characterizing these rocky worlds is a major focus of modern astronomy and space exploration.