A bright dot with three long bright tails flew north. The vision was as if the plane had flown three floodlights pointing backwards. The tails faded / shortened little by little and when they ran out the point started to grow. The dot grew into a REALLY big ball of light. Eventually, the light disappeared into the horizon and it would illuminate much of the northern sky. This observation could take more than 20 seconds. The light grew a hundredfold from the first observation, just like from a point to a sphere. The observation progressed from the top of the sky to the horizon. And it sure wasn’t an airplane. Some big missile can be.