PowerPoint doesn't look to be smart enough for that.
Use the PowerPoint Morph transition to zoom.
- Create a slide with the global view of the Moon.
Use whatever technique you want to highlight the area that you want to zoom in on.
For example, animate temporary crosshairs that draw attention to the area, and then "leave behind" a semi-opaque rectangle (or whatever shape you want).
- Duplicate the slide with the Moon and highlighted area.
- Group the Moon and the highlighted area on that slide.
- Duplicate that slide.
- On the new duplicate, enlarge the group so that it is bigger than the slide, and move it so that the highlighted area is at the center of the slide.
Apply the Morph transition.
Preview the transition: it should zoom in smoothly from the "global" view (the previous slide) to the close-up. Adjust the duration of the transition as you see fit.
- Create a new slide showing the local feature at that area.
- Apply a "Fly-through" transition, or what transition you feel is most suitable.
I wrote this procedure not knowing what the local feature image looks like. If the local feature image is simply a more detailed "tile" of the global view, from essentially the same viewpoint, then I would adjust the procedure to skip the perhaps-unnecessary "fly-through" (or similar) transition (from the close-up of the global view to the local feature): I'd experiment by overlaying that detailed tile, appropriately reduced in size, on its corresponding location on the global view. Then I'd group those elements, duplicate that slide, and enlarge the group until the detailed area occupied the slide area (with the global view now much bigger than the slide). Then apply Morph to get the "zoom" effect.