Northern hemisphere -sky map - nightskyinfo., All-sky map for northern hemisphere amateur astronomers. it portrays the sky as seen near 40° north latitude.. The night sky december 2017 - jodcast, Northern hemisphere. is close to the bright star castor in the constellation gemini as shown on the chart. the night sky for january 2007. Skymaps. - publication quality sky maps & star charts, Maps of the night sky for northern and southern hemispheres, designed to be printed and used, and updated each month..