Bright white light ascending.First saw a large bright light up in the sky, and thought it could be a LARGE satellite. It was moving very fast for its size, and constant trajectory. The size of the light started to change like it was moving quickly up and away into the atmosphere. There were no blinking lights, but a huge intense white light that faded as it ascended and gradually disappeared.During this event both an airplane and satellite were in view making it easy to confirm what we had seen was not an airplane or satellite.