Two Friends Spot Cloaked? UFO Over Texas

• When: August 18th, 2019 around 10 PM
  
• Where: Alpine
• What: Crescent-shaped object with a pronounced outline but invisible in the middle

A really interesting report of an "invisible" UFO over Alpine, Texas has been submitted to NUFORC (case S148397):

On Monday, August 19th, at somewhere around 10:00 pm in Alpine, Texas. Me and two friends had stepped outside for a cigarette. As we normally do we lay on our backs and admired the night sky as there is very little light pollution where we're from. Me and one of my friends both at the same time verbally exclaimed at something we were seeing. It appears to be an almost bird-like crescent shaped object moving through the sky. It was invisible but we could still see it. It was almost, cartoonishly invisible as the outline of it was pronounced but the inside of the object was invisible. It seemed almost as if it was like a magnifying glass, warping the view of the stars above it as it traveled. It was completely dead silent. I'm unable to determine what it's elevation was. I saw it for 5-7 seconds, then lost track of it when I stood up to see it better. My friend claims to have seen it continue flying then disappear into the horizon. Had my friend not seen it. I'm almost certain that I would have dismissed it. But now I'm inclined to believe that it was some sort of flying object. Whether it was government technology or an alien spacecraft, I am unaware. All I know is that I did see it.