My wife and her friend were in a swimming pool, I looked NW, saw what looked like the moon but was only the size of penny in the sky, it was very far off it appeared. My wife said it can't be the moon it's way to small. It wasn't a perfect circle, but had a slight edge missing, it was white in color almost shiny, like a bright moon. We just stared, our friend turned to swim away, my wife and I kept staring trying to figure it out, then a star like object just fell out of it straight down and stopped, by this time our friend had turned to see the large penny shaped object collapse like a balloon and also turn into a star like object, they both stood still then both at once flew west out of site. We were blow away, have no idea what it was. We live near Luke Air force base, but it's south of us, this was further north west. This was unreal to us???