Take something like an SR-71 blackbird... It flew subsonic until it was often near the edge of space. If it was vaguely near takeoff or landing, it would be pos

Take something like an SR-71 blackbird... It flew subsonic until it was often near the edge of space. If it was vaguely near takeoff or landing, it would be possible to see with the naked eye. If you're a fan of the SR-71, this hilarious interview with pilot Brian Shul is definitely worth watching: https://www.youtube.com/watch?v=MmyAvRKDvJk https://www.youtube.com/watch?v=MmyAvRKDvJk