by tonytran2015 (Melbourne, Australia)
Finding North by stars with unclear sky requires determining the Celestial poles mostly from the 10 brightest stars. They are, in descending order of brightness, Sirius, Canopus, Alpha Centauri, Arcturus, Vega, Capella, Rigel, Procyon, Achernar and Betelgeuse.
The projection to the ground of the Celestial axis gives the terrestrial North – South axis.
The method described here uses only brightest stars with high elevations and is suitable for people living in areas with naturally hazy skies, with brightened skies such as in cities or with high horizons such as in valleys.
1. In the Northern hemisphere, over 40 degrees North. (outside tropical zone)
About Northern Celestial pole there is a quadrilateral of bright stars (Vega, 25 degrees distance, Deneb, 75 degrees, Capella, 50 degrees, Dubhe, 65 degrees, Vega, in clockwise order). The…
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