I was watching aacrobatic plane doing manuvers (yellow) maybe a 1000 ft. off the ground, he was making semi circle from SW to NE and as he plane got halfway through the loop heading straight up, my eyes pick up 2 highspeed lights in the distance moving south. The lights were parallel to each other with the one on the left somewhat dimmer the one on the right. The one on the right was very bright. They were 2 fast moving stars. They were moving faster than fighter jets with no noise. I did expect some noise since I figured they were moving faster than 500 mph. But there was none. No clouds in the sky. The speed was so fast, they just faded into the blue in a matter of seconds. I was then walking back to the east side of the house and there was acommercial jet flying in the same direction and much higher. Naturally ther was engine noise. Between the lights I saw nothing solid nothing but blue. I have been to many airshows, and I haven't seen anything that can fly that quietly.