Using A Planisphere

To use a planisphere, turn the mask until the required time lines up with the date (remember to deduct an hour when Daylight Saving Time is in effect). The stars above the horizon at that time and date will appear within the cut-out area of the mask. Rotating the mask will show how stars rise and set during the course of the night. North, south, east, and west are marked around the edge of the mask, corresponding to the directions on your horizon.

turn the map inside the casing.

compass direction helps you relate the star map to the real sky the edge of the window corresponds to your horizon turn the map inside the casing.

compass direction helps you relate the star map to the real sky the edge of the window corresponds to your horizon

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