Perhaps you should try some spelling variations:
practical astronomy » nautical astronomy, positional astronomy
astronomy survives » astronomy survey, astronomy surveys, astronomy studies
optical astronomy » nautical astronomy, spherical astronomy, positional astronomy
astronomy series » astronomy sergey, gastronomy services, astronomy studies
does practical » notes practical, does practice, globes practical
patrick does » patrick dobel, patrick de, patrick del
patrick moon » patrick moore, patrick mein, patrick mons
moon optical » ion optical, non optical, photon optical

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 does practical astronomy series ) OR ( the patrick moon optical astronomy survives )).
• Adding a wildcard symbol may retrieve word variants: (( the patrick does practical astronomy series ) or ( the patrick moon optical astronomy survives ))*.