Silent, wide and barely visible boomerang shaped object flying west over leander at 2am

Stargazing around 2 in the morning when all of a sudden an object blocks the stars in the part of the sky im looking at, i refocus my eyes only to realize this is a large boomerang shaped craft that is just barely visible under the night sky, almost perfectly camouflaged, and is heading west from cedar park.  I would guess this was flying over leander from where I saw it.  It made absolutely no noise and was incredibly camouflaged in the night sky.  There was no light emitting from the craft, the only reason I could see the craft was because of the silhouetting of the light from the stars in the night sky.
It was flying rather low so I was very shocked considering i'd just been watching a lot of other air traffic come into austin, but to my surprise when i checked flightradar24 after this sighting there was ZERO air traffic within a 150 mile radius....
I would also mention that this boomerang object was very wide, it reminded me of the b-2 stealth bomber in wingspan honestly, which definitely makes me think this is some military black project that I just witnessed, not something extra terrestrial.  Either way, when I saw it, i was incredibly spooked.
Never seen an actual unexplainable UFO in my life before, i would consider myself a skeptic of sorts when it comes to that stuff, so I have to say i feel pretty shaken up after this experience.