Changes

With the World of Motion and [[Universe of Energy]] pavilions closed for refurbishment and no immediate plans for a space pavilion, Horizons remained operational through 1998<ref name= "Martin"/>. Although basic maintenance continued to be done on the attraction, no real money was spent to update or upkeep Horizons. With the pavilion’s days clearly numbered, in 1999 the idea for a space pavilion once again took center stage<ref name= "Martin"/>. Unlike previous incarnations however, this time Compaq entered negotiations to sponsor the new pavilion<ref name= "Martin"/>. With a sponsor in place, Disney settled on an idea that had previously been considered as a preshow for Journey Into Space-a centrifuge attraction that would take guests into space<ref name= "Martin"/>. In order to facilitate the new attraction, it was decided that the Horizons pavilion would be demolished and a brand new pavilion would be built. Horizons closed for good on January 9, 1999, and on April 20, 2000 Mission: Space was announced to the public<ref name= "Martin"/>. Unlike previous incarnations of the space pavilion, Mission: Space was themed as astronaut training center. Instead of actually traveling into space as previous versions of the space pavilion imagined, Mission: Space allows guests to experience the training that astronauts going on the first mission to Mars would experience.

Construction on Mission: Space began in October 2001<ref name= "Martin"/>, and although there was concern that Compaq’s 2002 merger with Hewlett-Packard would delay the attraction, this never happened. Mission: Space Opened to guests on August 15, 2003, and was officially dedicated on October 9th of that year<ref name= "Martin"/>.