Help identifying space-themed sets
Couple of observations:


Neither of these pictures shows complete sets
The parts you show in each picture most likely do not all come from the same set


From what I can see, you have the following parts of sets in the pictures, clockwise from top left:


Parts of a Y-wing (likely 9495 Gold Leader's Y-wing Starfighter ) plus parts of 7166 Imperial Shuttle





Parts of a Naboo Starfighter (likely 7660 Naboo N-1 Starfighter and Vulture Droid) plus parts of another set (the large grey wedge with the green stickers is not from 7660).





Parts of 10188 Deathstar mixed with parts of a 8039 Venator-Class Republic Attack Cruiser





More parts from the Venator Class Attack Cruiser (the engines on the left), plus a 7675 AT-TE.