Original sentence: According to the Expanded Universe sources and starwars.According to the Inside the Worlds of the Original Trilogy fact book, detailed scaling of the station in the movie, the second Death Star was 900 kilometers in diameter.According to the Star Wars Incredible Cross Sections fact book, however, the first Death Star was 160 kilometers in diameter.com, the smaller death star was 120 kilometers in diameter and the second one was 160 kilometers in diameter
Edited sentence: According to the Inside the Worlds of the Original Trilogy fact book and detailed scaling of the station in the movie, the second Death Star was 900 kilometers in diameter.According to the Star Wars Incredible Cross Sections fact book, the first Death Star was 160 kilometers in diameter.While some Expanded Universe sources and starwars.com state much smaller figures—120 kilometers for the first Death Star and 160 kilometers for the second—most of the evidence argues for the larger sizes