| Ormsby MacKnight Mitchel - Astronomy - 1860 - 424 pages
...readily measured, and which is found to undergo a very slow change from century to century. In case the earth's axis were perpendicular to the plane of the ecliptic, then the illuminated hemisphere of the earth would always be bounded by a meridian circle, and every inhabitant... | |
| Ormsby MacKnight Mitchel - Astronomy - 1860 - 396 pages
...readily measured, and which is found to undergo a very slow change from century to century. In ease tho earth's axis were perpendicular to the plane of the ecliptic, then the illuminated hemisphere of the earth would always be bounded by a meridian circle, and every inhabitant... | |
| Edward Payson Jackson - 1887 - 100 pages
...Length of Day and Night. THE CHANGE OF SEASONS. — THE VARIATION nsr THE LENGTH OF DAY AND NIGHT. 94. Suppose the Earth's Axis were Perpendicular to the Plane of the Ecliptic (Fig. 25), then the plane of the ecliptic would coincide with the equator, and the sun would, accordingly,... | |
| Francis Wayland Parker - Geography - 1888 - 428 pages
...always pointed toward the sun; what would be the result? Illustrate and lead pupils to discover. 2. Suppose the earth's axis were perpendicular to the plane of the ecliptic; what would be the result ? 3. Suppose > the earth's axis were inclined 45 degrees to the plane of its... | |
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