I want to organize three images in a frame, simulating the effect of a zoom,

I have three images, I want to organize them in a frame to cause the effect of a zoom, similar to the image I have posted above. In this image the galaxy is at left, but i want to learn how to modified this position in the code, becouse acctually I need the second image(in our case, the Solar System) at right.

It is no necessarily that one image overlap the other, but it is not a problem if this occurs

I have no clue how to do it, any advice?