Об­ра­зуй­те от слова MAIN од­но­ко­рен­ное слово так, чтобы оно грам­ма­ти­че­ски и лек­си­че­ски со­от­вет­ство­ва­ло со­дер­жа­нию тек­ста.

Until recently, Pluto was known as the ninth planet in our solar system. It was spotted and labeled as a planet in 1930.Composed __________________ of ice, Pluto was thought to be the farthest planet from the sun.