High altitude bright strobing light moving at a very high rate of speed.I was walking outside to get the morning paper, and I looked up to admire the stars in a clear sky. I saw a flash or light that appeared to be at a very high altitude. The light would flash rather brightly every 1-2 seconds, as the object moved across the sky at a very high rate of speed. The object flew in a straight path with no unnusual maneuvers. What really got my attention was the intensity of the light flashing, and the high rate of speed of the object. I am a licensed commercial pilot, and I am familiar with the flight characteristics of both civilian and military aircraft, and I am not familiar with any aircraft that can travel at that rate of speed. The flash of light was different than the high intensity strobes you see on aircraft. It was more like a yellowish/red pulse. The object was not visable between flashes, but it was amazing the distance that the object traveled between flashes. The object traveled from the west to the east, and the trees finally obscured my vision.((FOLLOW-UP COMMUNICATION)) Thank you for your interest. The object (light) was moving from the West to the East. The object appeared to travel in a straight path. The speed of this object makes me doubt that it was a satellite, or other debris in orbit. When I first saw the object as it flashed, I fixed my eyes towards that location as it disappeared. I was shocked to see it reappear much further away from where I had originally seen it.I have had two other unusual sightings in the past, so I am kind of keep an eye out for unusual activities in the sky. One of the sightings was in the 1980s when I used to fly a considerable amount. We were flying a Piper Navajo to Key west late in the afternoon and we witnessed an unknown craft of rather large proportions at 10000 feet. It was partially obscured by the clouds but seemed to be stationary. It was definitely not a Lenticular cloud. The sighting was very brief. The other sighting that I had was in 1997. I was traveling on Hwy 278 Near Savannah River Site in South Carolina when I saw a glowing object maneuver at low altitude at a slow steady speed, and abruptly shoot straight up into the sky. Again the sighting was very brief. This about sums it up. Thank you for your attention. Regards, ((name deleted))((END FOLLOW-UP))