Ice giants are a type of planet similar to Neptune and Uranus in our solar system. These planets are composed mainly of a mixture of water, ammonia, and methane, which gives them a bluish coloration. Ice giants are generally larger than terrestrial planets like Earth but smaller than gas giants like Jupiter and Saturn. They are classified as "ice giants" due to the presence of these volatile substances in their compositions. Research on ice giants focuses on understanding their atmospheres, internal structures, and origins, as well as comparing them to the other types of planets in our solar system. Some of the key questions being studied include the formation and evolution of ice giants, their magnetic fields, and the possibility of habitability on their moons.