marbles — metamorphosed limestone, consisting chiefly of recrystallized calcite or dolomite, capable of taking a high polish, occurring in a wide range of colors and variegations and used in sculpture and architecture.
spacecraft — a vehicle designed for travel or operation in space beyond the earth's atmosphere or in orbit around the earth.
sputniks — (sometimes initial capital letter) any of a series of Soviet earth-orbiting satellites: Sputnik I was the world's first space satellite.
