Was walking dog on beach and looked up at stars. noticed a very bright one, that seemed to be moving. watched it go up, down diagonal, side to side.Watched for about 20 minutes. went inside, balcony overlooks the beach in north myrtle near long bay. looked out and could still see it moving. told husband who confirmed same. it was extremely cold, so i kept going in and out. noticed a couple of planes in the sky but what stood out was a rather low flying one about two hours in. it seemed to get a little closer and could see shape vs. just looking like a star moving in various directions. sometimes it. over slowly, other times more quickly. wasn't close enough to see clearly but could sort of see a diamond or triangular shape. the movement wasn't like a plane that travels in a forward path, or a helicopter. it seemed to be in a certain area, just to the right of 3 stars aligned vertically. checked multiple times, as did husband.