Just got in my above ground pool, looked around to see the clouds above. I looked to the west, above my 6 foot fence. I saw; what at first glance was a mylar balloon ascending from about a quarter mile away. It had the speed or motion of ball released under water. It then leveled out and came east; toward me. It moved fairly quickly slightly north of me. Davis Monthan air force base is about 3/4 of a mile directly south and I would liken the speed of the object like that of an A10 going by, only lower and no sound. It started to sparkle more or flicker raising in altitude as it continued east. As it got further east and higher in the sky I noticed that it was not as high as the cloud cover. It then seemed to stop and remain stationary for 4-5 seconds. At this point I would guess it to be about 3-5 miles away and the only reason I could still make it out at all was from the continuous flickering or random reflecting it was producing. The mylar balloon theory was crushed after it leveled out and started coming my direction when it was to the west. When it was as close as it got to me, I would guess the size to be at least ten times larger than an average balloon but smaller than a car. Finally, as the object continued to move; after the short stationary pause, it seemed to go into the cloud. I figured that would be the last I saw it but about 10 or 15 seconds later I saw it again what seemed to be twice as far away. 7-10 miles only noticeable because of the flashing. It then continued away till I got hot and dunked under the water.