Perhaps you should try some spelling variations:
optical astronomy » nautical astronomy, positional astronomy
astronomy series » astronomy sergey, gastronomy services, astronomy survives
moore optical » moire optical, more optical, core optical
patrick corsi » patrick cozzi, patrick coggi, patrick corr
patrick core » patrick corr, patrick coyle, patrick case

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 moore optical astronomy series ) OR ( the ((patrick core) OR (patrick corsi)) spherical astronomy series )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( the patrick moore optical astronomy series ) or ( the ((patrick core) OR (patrick corsi)) spherical astronomy series ))".
• Adding a wildcard symbol may retrieve word variants: (( the patrick moore optical astronomy series ) or ( the ((patrick core) OR (patrick corsi)) spherical astronomy series ))*.