Brilliant Illumination fixed spot in sky, did not move, then dissipated

Chattanooga Tennessee August 28, 2021, between sunset and twilight 8:30pm and 8:39pm .
A fellow musician was invited to play music at a private party on the rooftop of a home and  I played percussion that night. During the time I was not playing I struck up a conversation with a beautiful long white haired woman in a white dress visiting from CA. It was still fairly light outside when all the sudden I noticed a really bright planet and pointed it out. We both sat marveling at its beauty. As I scanned the sky as I often do at dusk to my left between Lookout mountain and Elder mountain I could see the aquarium and Olgiati bridge. Then I noticed an even brighter light but it wasn’t yellowish In color like the previous planet/star I had been eyeing. Nope this was different. This array of light was right between Lookout and Elder,that’s how low to the ground it was. This clear silver white,bright light was neither a star nor a planet. Almost like a spotlight on steroids.
‘do you see what I’m seeing,or is it just me?’ She replied ‘oh no,it’s not just you I see it too.’ I was like,’have you ever seen anything that bright before?’ She said, ‘I can’t recall ever,maybe it’s a satellite.’ ‘No, satellites are way way way higher up in the atmosphere. I have seen satelites before this thing feels like it’s right in our face!’ ‘Maybe it’s the North Star?’ It was located South West and within the earths troposhphere so it couldn’t have been a star.
I just kept carrying on how unbelievably bright and BIG it was. The shape looked like a mix of great heptagram,irregular polygon and heptagram. It never moved from that one spot. It was a single object for sure. It did not sway side to side nor move from the spot we first began seeing it at.  It was literally like a hole was ripped into the atmosphere. It didn’t move. Didn’t budge. I ran to get my cell phone to film this and by the time I pulled up my camera I watched it start to fade.  Then flicker almost as if someone was blowing out an electronic candle. Slowly this light was disapating until the shine was completely out. It’s like it just withdrew itself from the universe. Almost like it was never there to begin with. Another way to describe the shape and color  was like the sparkle on a diamond ring. No it wasn’t cloud cover that made it fade away. This brightness was not a plane nor a helicopter. It appeared in one spot and disappeared in the same spot.