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Old 06-11-2019, 07:45 AM
brossa is offline
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Join Date: Feb 2005
Posts: 1,141
Actually, that folded paper bag might work as a astrolabe too. Hold one corner toward your eye, with the adjacent 90 degree corner away from you. Holding your head still, manipulate the bag until you are sighting along the bottom edge at the horizon just below the Sun. Now mark the height of the Sun along the far vertical edge of the bag. Do this multiple times, and eventually the Sun won't be climbing any more; the highest mark indicates the greatest height of the Sun, and you can draw the angle on the bag.