text: Space means a continuous area or expanse which is free, available or unoccupied. Space is everything beyond the sky and it is not the structure that has to use a launching platform many times to escape the Earth's gravity. Aircraft carrier is a warship that serves as a seagoing airbase, equipped with a full-length flight deck and facilities for carrying, arming, deploying and recovering aircraft. Aircraft carrier is a seagoing airbase and not a launching platform for space program. Circus is a travelling company of acrobats, clowns, and other entertainers which gives performances, typically in a large tent, in a series of different places. Circus is not the structure that has to use a launching platform for space programs.