I built my first telescope myself when I was around ten years old. I built it using an optics kit that I got after burning a finger while trying to solder something in an electronics kit (yes, back in the good old days, some toys actually had parts that could burn down your house or at least melt solder). The Moon always appeared upside down in that telescope, which always struck me as odd. After all, my binoculars showed everything right side up. I had the suspicion that the grown-ups were trying to prevent me from using the telescope…