Thanks! I think it's fair to say in retrospect that I got a bit overexuberant with the theme density, and while I got away with it through most of the puzzle, the SE corner did definitely suffer for it. Still learning a lot with each puzzle!
awesome misdirect on the taylor swift clue... plopped in telescopes and the revealer immediately, but i kept forgetting that space had to be on the outer margin instead of the first word... so kept mulling over what 1989 song starts SPACE B????