enormous circle of lights over westhiemer

With two other passengers in the vehicle, we were driving back to our hotel on Westheimer driving away from the Galleria area. The street was bustling w/ city night life. I looked up through the open sun-roof while stopped at a light and noticed a non-blinking, off white light and it was not moving fast nor did it have any other blinking lights. Then I noticed another one yars away, then another, then another, equal distance apart eventually forming what looked like a circle. It was just hovering and I could not see anything beyond the lights, just blackness. We eventually proceeded forward and the lights seemed as if they were moving slowly but we lost sight of them. I have never seen anything like them. My Mother had a theory that they were satellites? Really?