O que você está se referindo é " The Endor Holocaust ".
No universo, foi "uma teoria apresentada pelos agentes de propaganda do Império depois da Batalha de Endor." De fato, Endor foi salvo:
Much of the debris of the superweapon was sent through a hyperspace wormhole that briefly opened up when the Death Star's hyperdrive regulator was destroyed.
[...]
According to the man's fellow cantina patrons, most of the Death Star's mass was obliterated in the explosion, while the Rebel Alliance used tractor beams to ensure the rest did not damage the world. [...]
At least one Imperial Star Destroyer did crash onto the moon's surface, though, and some debris was reported to have caused minor damage to Ewok habitats.
Fora do universo, o link que você enviou é " O conteúdo original é © copyright do Dr. Curtis Saxton 2002. " (role até o final para ver esta menção) Há uma menção a este trabalho no < a href="http://starwars.wikia.com/wiki/Endor_Holocaust#Behind_the_scenes"> seção de bastidores do artigo da Wookieepedia.
The Endor Holocaust theory was first put forward by Curtis Saxton on his Star Wars Technical Commentaries fansite. Saxton claims that it is scientifically inevitable for the holocaust to happen, though it has never been identified as happening in any canon source. Some sources, such as X-wing: Wedge's Gamble and the comic book Apocalypse Endor, mention the theory, though reports in these sources are either propaganda or myth.