increase from soft light to a bright glow, 90 degree movement.I was on my front porch enjoying the evening sky. In between the Big Dipper and Polaris (from my perspective seated on my porch, it was to the right of Polaris and to the left of the Big dipper), what I originally thought was a star began to significantly increase in brightness. It then began moving slowly downward in relation to Polaris and the big dipper. It then began moving slowly left at 90 degrees toward and below Polaris from its downward movement before fading completely. I can't say for sure that it wasn't an airplane, but it appeared too high for landing lights, and it was not blinking.