Short answers, pulled from the story.
Star Wars: A Galactic Spectacular is a nighttime show at Disney's Hollywood Studios in Walt Disney World that combines fireworks, projection mapping, fire, lasers, fog, and searchlights. Star Wars imagery is projected onto the park's Chinese Theater facade and surrounding buildings near Hollywood Boulevard's hub.
Star Wars: A Galactic Spectacular held its celebrity filled World Premiere on Friday the 17th of June 2016. It replaced the park's previous display, Symphony in the Stars: A Galactic Spectacular.
Star Wars: A Galactic Spectacular replaced Symphony in the Stars: A Galactic Spectacular, a pyrotechnic show that first debuted as Symphony in the Stars during the Last Tour to Endor event in 2010. That earlier show highlighted John Williams' musical score along with archival voice and sound clips from the films, and it ran nightly from December 2015 until its retirement in June 2016.
Star Wars: A Galactic Spectacular projects imagery from all nine Star Wars saga films onto the Chinese Theater facade at Disney's Hollywood Studios, using two additional blank projection surfaces flanking the building. In Disneyland Paris, the show's imagery is instead projected onto The Twilight Zone Tower of Terror.
The show's producers worked with composer John Williams and his music editor, Ramiro Belgardt, to adapt Williams' film scores into the show's soundtrack. Industrial Light & Magic created custom CGI sequences for the display.
A second version of Star Wars: A Galactic Spectacular debuted at Disney Adventure World in Disneyland Paris on the 14th of January 2017. It was shown seasonally during the Season of the Force rather than as a nightly presentation.