Slow flying, noiseless object with red strobes.

This incident occured several years ago when I was 7 or 8 years old.  Since the incident I have been keenly interested in military technology and the UFO phenomenon. I have always sought an explaination as to what I observed but so far have been unsatisfied. I was staying up late with a younger child.  I believe it was a summer night about 1:30 or so in the morning.  I don't think we were supposed to be up but when you are that age and you have a friend over you sometimes want to stay up all night and play.  My bedroom window faced north just outside a highway and I was looking outside at the sky and hills when I noticed an airplane.  I would guess now that it was 5 miles out?  The airplane was rather odd however.  Instead of the alternating red/green wing strobes it had 2 red strobing lights evenly spaced that flashed slowly and simultaneously.  I became very interested because I had never seen an airplane at night that had lights like that.  I watched for a while and it seemed like the aircraft was floating in the air.  It was moving (north-south), but every airplane I had seen fly before would have passed over by then (I had been watching for maybe 5 mins.)  I wanted to know what kind of airplane it was!  I opened the window hoping to hear any engine noise.  Was it a jet or rotory craft?  as it came closer over the window, I turned off the light partly out of fear partly to cut the glare from the room light.  Fear.  I still couldn't make out the shape, just the lights.  I began to stop thinking it was an airplane.  I was very afraid but excited and curious at the same time.  The object was just overhead.  I cannot remember the silhouette.  But it must have been 200ft overhead just gliding over slowly lights blinking.  Absolutely no noise!  I could have ridden my bicycle faster than it was traveling.  My friend saw it too, but I don't remember his reaction.  As soon as it left my field if view (directly over the roof), I ran to my parent's bedroom.  I wanted an adult to see it!  They told me to go to bed.  I rushed out the front door I was no loger afraid, I wanted to see it closer.  At the rate of speed it was going it should have still been over the roof.  When I went outside the night was still and quiet and the object was gone. I have seen all kinds of airplaned since.  Blimps, ultralights have motors...  Other airplanes have engines that make much more noise.  I have seen a jet at night with only a single red strobe, but never two that flash slowly and simultaneously.  Now that I know more about aircraft, I realize that at that altitude and speed it should have stalled.  It couldn't have been going more than 15mph. I wish I had more visual details to report.  Many years have gone by and it was night.  The memory still strikes me.  I hope taht someday I will find a decent explaination but I am afraid I will never find one.  The impression after the incident was that it wasn't man made.
Date is approximate.  PD