Ice cloud

An ice cloud is a colloid of ice particles dispersed in air. The term has been used to refer to clouds of both water ice and carbon dioxide ice on Mars. Such clouds can be sufficiently large and dense to cast shadows on the Martian surface. An ice cloud is a colloid of ice particles dispersed in air. The term has been used to refer to clouds of both water ice and carbon dioxide ice on Mars. Such clouds can be sufficiently large and dense to cast shadows on the Martian surface. Clouds on Earth can contain ice particles.