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.
- IceCube (spacecraft), a satellite used to map ice clouds
- "ESA Portal - Ice clouds put Mars in the shade". European Space Agency. 16 January 2008. Retrieved 2009-12-20.
- Tom Freeman (December 8, 2009). "New satellite to measure ice cloud particles could provide valuable new climate data". Retrieved 2009-12-20.
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