If you view the moon through a telescope, you'll see it upside down.
Work Step by Step
The ray diagram for an image made by a converging lens is shown in Figure 28.47c. The moon, viewed through a telescope, is upside down. Some maps of the moon are also upside down to better correspond to what you see. Incidentally, people in the other hemisphere (e.g., Australians, if you live in the Northern hemisphere) also see the moon upside down from the way that we see it, because they ARE upside down compared to us. Mind blown.