Abstract: An expandable spacecraft is provided which includes at least one main generally cylindrical body member. This body member comprises a generally waffle-type structure which includes a plurality of flanges extending generally radially from the body member. An auxiliary housing is provided which is adapted to increase the volume of the body member. The auxiliary housing is connected to the main body member and is slidably and telescopically received therein. The main body portion and auxiliary housing member can be provided in a compact state with a predetermined volume or can be expanded by extending the housing outwardly from the main body member to increase the volume of the assembly to a desired degree.