I saw what appeared to be a large black tear in the sky that moved rapidly enough I had to turn my head to track it over 5-6 seconds

I was taking my trash out and remembered there wasn't a cloud in the sky, so I decided to take advantage and do some star seeing. One star really caught my eye. It was too damn bright. So I turned around and started walking back to my porch to get a different angle and that's when I saw it. A large black tear appeared. It was like a piece of the sky got ripped out. It expanded rapidly from in front of me to my left seeming to repair itself as it did so like a zipper closing. It went over a dim star and when it was gone, so was said star. It moved so fast I had to turn my head to track it..