Single pulse of light followed by a high rate of speed and extraoridanary altitude.We were gazing at starts and looking at Satellites in the sky. My wife was the first to see a light that started to shine brighter from what we thought was a satellite. It became brighter and brighter and then dimmed at the same speed. After it dimmed, it continued to travel on a path, speed and altitude that a satellite would also travel. There were absolutely no additional indicators that this could be a domestic aircraft. The speed of the object well exceeded any aircraft that I have ever witnessed.