Perhaps you should try some spelling variations:
optical astronomy » nautical astronomy, positional astronomy
astronomy series » astronomy sergey, gastronomy services, astronomy survives
core spherical » case spherical, pole spherical, some spherical
patrick moire » patrick moore, patrick mkie, patrick meir
moire optical » more optical, core optical, fibre optical
patrick core » patrick corr, patrick moore, patrick corsi

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (( the patrick moire optical astronomy series ) OR ( the patrick core spherical astronomy series )).
• Adding a wildcard symbol may retrieve word variants: (( the patrick moire optical astronomy series ) or ( the patrick core spherical astronomy series ))*.