CI carbonaceous chondrite

CI carbonaceous chondrites are a type of stony meteorite that offers significant insights into the early solar system. Although named for their dark appearance, which is due to a fine-grained matrix rather than high carbon content, they are important because their elemental composition closely matches that of the Sun. This makes them chemically primitive and valuable for understanding the solar system's formation.12

Unlike most chondrites, CI chondrites are so heavily altered by water that they lack chondrules, which are typically a defining feature of chondrites. Despite this, their Sun-like chemistry justifies their classification with chondrites. Some scientists speculate that their composition might indicate a cometary origin, as comets are thought to be among the most unaltered materials in the solar system.12