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.