Help identifying space-themed sets I have acquired a 20 pound bag of space-themed Lego pieces that seem to belong to some special Technic set(s). Many pieces and assemblies seem way too unusual to be  acquired from a random bulk purchase by the prior owner - the pieces are themed and uncommon. I am attaching some photos for your reference. I would love to hear if any of you can identify which set(s) these may belong to, unless the prior owner totally made these up. Thank you for your help! I have spent about 20 years of my life around LEGO bricks and have never seen any pieces like these. I am stumped!

P.S. I've realized that I have a Death Star in the bag and a Captain Rex's AT-TE, but still can't figure out what the white and the yellow ones are.
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.