One of @disneyland's fastest and most popular rides is celebrating a birthday Saturday! The opening ceremony for Space Mountain took place on May 27, 1977. To celebrate the anniversary, the iconic attraction will revert back to its original theme on Thursday. In November of 2015 the ride was transformed into @starwars Hyperspace Mountain. The Tomorrowland favorite also turns into Space Mountain Ghost Galaxy during Halloween Time. Thanks to #abc7eyewitness @disneydentist for this terrific shot! Disney is the parent company of ABC7.