Aaron Cress
Tyluko-Kai Kaimana
To clarify on that bit, if you peruse the
Timeline and click on the first entry, you'll find that a number of planets destroyed during canon and legends material were recreated through the use of Yuuzhan Vong terraforming in the golden age of history right before a 400 year dark age that saw much information immediately after this lost to time through a plague that wiped out a large majority of the galaxy.
Planets like Alderaan were still destroyed, per their status in both canon and legends, but were more or less rebuilt so as to give writers the ability to utilize their favorite canon/legends spots as hubs for RP.
That being said
Jsc
is pretty much dead on with his interpretation of how canon works here - if you're a movie-canon-only purist then you can consider the happenings of books/comics/etc to be hearsay/rumors/legends/etc that were possibly made up to explain what fragments of the past survived into today, or you can take them as gospel if you prefer an all-encompassing legends+canon mix, or anything in-between.
The galaxy is your oyster.