Plane flying straight into space.At 01:20 I observed a aircraft go over head after I had observed a military aircraft go overhead and lead at Pittsburgh Airport. The second craft continued to claim into space for over 40 minutes at which time I finished observing. Craft only had white lighting moved at a high speed but not much faster than most jets from my point of view. But clearly continued to go farther out of atmosphere. I see many jet take off and land at the two local airports this one never went over the horizon. It only continued to gain altitude.