Aircraft that sounds like a rocket launch?I wanted to report an interesting occurance over my house earlier this month. Before I do, you should know that I am a student pilot, an avid aircraft buff, and have been in/around aircraft all my life. I know the subject pretty well.I live in Derry New Hampshire, which is not far from the Massachusettes border. On the morning of August 4th, I was still online at 1:00 am. It was a very clear night.I began to hear a rumbling sound which very quickly graduated to a loud roaring sound, rattling the windows.I sprinted outside to have a look. Traveling east to west, high overhead, was a single bright white light. I would guess its altitude to have been at least thirty thousand feet, if not more. I could discern no standard aviation lighting, but that's not unusual given the height. What was amazing was the roar! I recently moved back here from Florida's Brevard County, where the sound of rocket launches was somewhat routine. If I had seen this in Florida, I would have thought they were launching a rocket in the wrong direction. As I said, the sound of this aircraft was so loud it rattled the windows, and sounded EXACTLY like a rocket launch. There was no sound of turbines at all.This sounded extremely powerful. My first impression was that I was looking at a missle coming in from the Atlantic somewhere. The hair stood up on my arms and for a moment I thought..."uh oh". All I can say was that this was no normal aircraft, if that's what it was. I do not believe this was a fighter jet with afterburners on. It was not traveling especially fast, and continued at the same speed throughout its trajectory.I would like to know if anyone else in the area heard this that night. It was traveling roughly over the Mass/NH border.The sound actually awoke others in my household, which has never happened before.Thanks for your time, Greg