You are right. I do think it is miraculous that the trajectory happened to bring the capsule into a solar eclipse and Mercury, Mars and Saturn are positioned in this way. This site helped me understand the current/past positioning[0]. Even though there is no reason the photo has to be oriented with the planets to the right. I am still surprised at how blurry they look when zooming given what I see from Earth with binoculars. I guess they are magnifying considerably more than this lens.
In retrospect it was pretty silly to think they could have been galaxies.