In darkness for several months in succession, or until the sun, by gradually coming nearer to the inner circle, throws his light more and more over the centre.
Hence, in that period, mid-day and midnight, and morning and evening twilight, occur to every part of the earth except within the arctic circle, 1, 2, 3. The sun, S, describes the circle A, A, A, on the 21st of December in one day, or twenty-four hours. Path on December 21st, and B, B, B, the same on June 21st N, the northern centre S, the sun and E, the position of Great Britain the figures, 1, 2, 3, the arcticĬircle and 4, 5, 6, the extent of sun-light at noon of that day. 61, the circle A, A, A, represents the sun's daily These changes will be better understood by reference to the diagrams, figs. But when, in six months afterwards, the sun is on the inner circle, A, the light extends beyond the arctic circle, 1, 2, 3 and as it moves in its course, the centre, N, is continually illuminated. although it is daylightĪll over the rest of the earth in twenty-four hours, the centre, N, is left in continual darkness. It will be seen by the diagram that, on the shortest day, the light terminates at the arctic circle 1, 2, 3, leaving all beyond in darkness and as the sun moves forward in the direction of the arrows, the edge of the circle of light continues, during the whole of its course, to fall short at this circle. When, as on the 21st of June, the sun by gradually contracting its path, has arrived at the inner circle, A, the same length of radius will produce the circle 7, 8, 9, which represents the extent of daylight on the longest day. 60), to the arctic circle, 1, 2, 3, as radius, and describe the circle 4, 5, 6, we have represented the whole extent of sun or daylight at a given moment on the shortest day.
60, as it is on the 21st of December, it is known that the light gradually diminishes, until at or about 20 degrees from the northern centre, it shades almost imperceptibly into twilight and darkness.
When the sun is on the outer circle, B, fig. IT is a well-established fact that light and heat radiate equally in all directions. CAUSE OF DAY AND NIGHT, WINTER AND SUMMER AND THE LONG ALTERNATIONS OF LIGHT AND DARKNESS AT THE NORTHERN CENTRE. Sacred Texts Earth Mysteries Index Previous Next Cause of Day and Night, Winter and Summer and the Long Alternations of Light and Darkness at the Northern Centre Zetetic Astronomy, Earth Not A Globe: Chapter VIII.
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