Light came from sky becoming Huge with no sound then leaving sight very fadtI live in Southwest Missouri. At approx. 9:25pm, I took my dog on leash to go to the bathroom. We live in the country and there was only a one bulb porch light on approx 50 yards away, so it was very dark around me. Something caught my eye to the ESE that I first thought was a planet. A bright white light, not flashing and no other lights near, that moved closer. It continued to get bigger until it was approx. 1/4 of the size a full moon appears to be. Then it turned south slowly went a little further (still very bright), then seemed to leave the atmosphere, reducing in size until I could no longer see it. It seemed to fade very fast, roughly 7 seconds. There are no clouds out tonight. I heard no sounds. We are on a medical helicopter path and that is NOT what I saw!! I looked around immediately and did see a plane to the East, very high with flashing lights. I then came back in the house.