Space Mountain is an outer space-themed, indoor roller coaster in Tomorrowland located at Walt Disney World's Magic Kingdom theme park in Bay Lake, Florida, near Orlando. The dark ride, which opened on January 15, 1975, is the original version of the iconic attraction that has since been replicated at other Disney theme park locations worldwide, with the exception of Shanghai Disneyland Resort. Space Mountain is one of the first computer operated roller coasters and is also the oldest operating roller coaster in the state of Florida.
Walt Disney originally conceived the idea of a space-themed roller coaster for Disneyland following the success of Matterhorn Bobsleds in 1959. However, due to technological and spatial limitations, the concept was further developed and eventually became a part of Walt Disney World. RCA helped fund construction and sponsored the ride from 1975 to 1993. FedEx assumed sponsorship from 1994 to 2004.
Space Mountain has undergone a number of changes since its opening, including new ride trains in 1989 and 2009, as well as incremental upgrades to incorporate modern roller coaster technology. It has also seen a number of cosmetic renovations to its entry, queue, and post-show elements, many of which were necessitated by changes in its corporate sponsorship over the years.