It’s Free Just click on the image to the left to print this 3-page PDF doc. Useful anywhere in the mid-latitudes of the northern hemsphere including the continential US, Hawaii, Europe, Japan, etc. Optimized for 1.5 hours after sunset but can be used for several hours after that. Indicates visible planets and best objects for binoculars and telescopes. Packed with facts, mythology, Moon phases, meteor showers and more.