Delta or 'V' shaped object, moving silently, unlit aside from surrounding light sources moving south to northlooking at jupiter with my son, we both notice something very faint pass in front of our view. What little was visible of it resembled a delta, or 'V' shaped object. Very little detail could be made of it, some very very dimly visible leading edges giving the impression of the delta shape. my son thought it was a plane, but there were 'zero' lights present on the object. I personally thought it might be a hang glider, but it is two hours past sundown and cooling dramatically outside. Besides...it seemed awfully high. it followed a south to north path pretty well perfectly. no sound was present at all, and flew at an estimated/guesstimated 10,000 feet. Don't quote me on that altitude as size was an issue to determine. I thought it could have been the ISS, but checking the position of the station found it to be only 'approaching' the western coasts of S.America and following the wrong course for what we saw. If it was a plane it was running silent and dark. If it was a hang glider it should have been dropping fairly quickly in suburban areas. Either way it was unlit, V shaped, and very quiet. A stealth fighter flying without lights or sound??