 | Jacques Rohault - Physics - 1723 - 358 pages
...it would ap~Eaft in the pear to defcribe a Circle, which would indeed be the fame as the Equator, if the Axis of the Earth were perpendicular to the Plane of its annual Circle, but muft now differ from it, and interfeiS it at an Angle of Twenty-three Degrees and... | |
 | John Keill - 1745 - 352 pages
...all thofe Viciffitudes of Seafon that yearly happen, w'st. Summer, Winter, Spring, and Autumn: for if the Axis of the Earth were perpendicular to the Plane of its Orbit, there would be no Alterations of Seafbns, no Differences in the Days and Nights, but every Part of... | |
 | George Adams - Astronomy - 1812 - 586 pages
...sinking and rising is perceptible over the < ;. ?., irf I'- $ -ir r ,f :•) -.;.-.• : whole globe. If the axis of the earth were perpendicular to the plane of its orbit, the equator and the orbit (or ecliptic)^ would coincide ; and as the sun is always in the plane of the... | |
 | George Adams - Astronomy - 1812 - 552 pages
...summer than in winter; and this alternate sinking and rising is perceptible over the whole globe, If the axis of the earth were perpendicular to the plane of its orbit, the equator and the orbit (or ecliptic), would coincide ; and as the sun is always in the plane of the... | |
 | John Lee Comstock - Physics - 1830 - 308 pages
...ecliptic, or the apparent path of the sun through the heavens, is the real path of the earth around the sun. It will be observed by a careful perusal...would be 12 hours day and 12 hours night. But since the inclination of its axis is 23J degrees, the light of the sun ia thrown 23^ degrees beyond the north... | |
 | John Lee Comstock - Physics - 1831 - 312 pages
...revolution of the earth will also be represented. Day and Night. Were the direction of the earth's axis perpendicular to the plane of its orbit, the days and nights would be of equal length all the year, for then just one ha'rf of the earth, from pole to pole, would be... | |
 | John Lee Comstock - Physics - 1832 - 308 pages
...motion of the sun, from east to west, is caused by the real motion of the earth from west to east. If It will be observed by a careful perusal of the above...would be 12 hours day, and 12 hours night. But since the inclination of its axis is 23i degrees, the light of the sun is thrown 23i degrees beyond the north... | |
 | John Lee Comstock - Physics - 1835 - 308 pages
...heavens. Hence, it follows, that the ecliptic, or the apparent path of the sun through the heavens, vs the real path of the earth round the sun. It will...would be 12 hours day, and 12 hours night. But since the inclination of its axis is 23j degrees, the light of the sun is thrown 234 degrees beyond the north... | |
 | John Lee Comstock - 1835 - 308 pages
...motion of the sun, from east to west, is caused by the real motion of the earth from west to east. If It will be observed by a careful perusal of the above...performs its diurnal revolutions, there would be 12 hours clay, and 12 hours night. But since the inclination of its axis is 23i degrees, the light of the sun... | |
 | John Lee Comstock - Physics - 1835 - 308 pages
...revolution of the earth will also be represented. Day and Night. Were the- direction of the earth's axis perpendicular to the plane of its orbit, the days and nights would be of equal length all the year, for then just one half of the earth, from pole to nole, would be enlightened,... | |
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... by which it is illustrated, that the sun constantly shines on a portion of the earth equal to 90 degrees north, and 90 degrees south from his place in the heavens, and consequently, that he always enlightens 180 degrees, or one half of the earth.... 
