My 15 yr old daughter and i were looking up at the sky between 10:30 pm and 11 pm. we were looking north towards the big dipper. we saw approx 10 small orb like ufos move south bound. as we were looking for more suddenly an enormous boomerang shaped ufo soared silently about 500 feel above us in the same direction and quickly disappeared. it looked almost like a wave passing over us in the sky.