Short answers, pulled from the story.
Star Wars: Galaxy's Edge covers 14 acres at Disneyland in Anaheim, California, and another 14 acres at Disney's Hollywood Studios in Orlando, Florida. Both versions are set in the village of Black Spire Outpost on the planet Batuu.
The Disneyland version of Star Wars: Galaxy's Edge opened to the public on the 31st of May 2019. Disney's Hollywood Studios version opened on the 29th of August 2019.
John Williams composed the main musical theme for Star Wars: Galaxy's Edge. William Ross conducted and arranged the recording with the London Symphony Orchestra at Abbey Road Studios in November 2018.
Star Wars: Galaxy's Edge features Millennium Falcon: Smugglers Run, a simulator ride, and Star Wars: Rise of the Resistance, a dark ride built around a battle between the First Order and the Resistance. Rise of the Resistance opened at Disney's Hollywood Studios on the 5th of December 2019 and at Disneyland on the 17th of January 2020.
Catherine Powell, who oversaw Disney's U.S. themed areas, resigned after attendance at Disneyland fell once the initial reservation-only period for Star Wars: Galaxy's Edge ended. The land had drawn heavy crowds away from the rest of the park before that falloff.
Walt Disney Imagineering executive Scott Trowbridge supervised development and construction of Star Wars: Galaxy's Edge at both Disneyland and Disney's Hollywood Studios.