 When the sun is north of the equator the days are longer than the nights in the northern hemisphere ; and when the sun is south of the equator the reverse of this is the case; and in the southern hemisphere, of course, similar changes take place. At the...  Spherical Astronomy - Pàgina 105per Franz Brünnow - 1865 - 559 pàginesVisualització completa - Sobre aquest llibre
 | Robert Joseph Sullivan - 1854 - 332 pàgines
...recede from the equator, north or south, this equality will cease to exist, l\hen the sun is aorth of the equator the days are longer than the nights in the northern hemisphere ; and when the sun is south of the equator the reverse of this is the case ; and in the southern hemisphere,... | |
 | Robert Joseph Sullivan - 1861 - 364 pàgines
...hours each; but if we recede from the equator, north or south, this equality will cease to exist. When the sun is north of the equator the days are longer than the nights in the northern hemisphere; and when the sun is south of the equator the reverse of this is the case; and in the southern hemisphere,... | |
 | Robert Sullivan - 1862 - 432 pàgines
...hours each; but if we recede from the equator, north or south, this equality will cease to exist. When the sun is north of the equator the days are longer than the nights in the northern hemisphere ; and when the sun is south of the equator the reverse of this is the case ; and in the southern hemisphere,... | |
 | Joseph Hutchins Colton, Charles Carroll Morgan - 1863 - 608 pàgines
...diminishing. 6. The days and nights at the equator arc always of equal length, or twelve hours each. 7. While the sun is north of the equator, the days are longer as we go toward the north pole ; but while south of the equator, their length increases southward.... | |
 | Franz Brünnow - 1865 - 592 pàgines
...as long above as below the horizon. If we have 5 = 0, *0 is also equal to 90" for any value of -t, hence stars on the equator remain as long above the...is always the case. It is obvious that a value of ta is only possible while we have tang tp tang d <T 1 . Therefore if a star rises or sets at a place... | |
 | Franz Brünnow - 1865 - 632 pàgines
...as long above as below the horizon. If we have S = 0, t n is also equal to 90" for any value of t, hence stars on the equator remain as long above the...all places on the earth. At places on the equator x this is always the case. It is obvious that a value of t 0 is only possible while we have tang <f:... | |
 | Francis Bullock - 1873 - 240 pàgines
...longer than the nights in the northern hemisphere ; but for the rest of the year, the sun, being south of the equator, the days are longer than the nights in the southern hemisphere. At the equinoxes the days and nights are everywhere of equal length. 6. Q. Why... | |
 | Robert Sullivan - 1874 - 502 pàgines
...hours each ; but if we recede from the equator, north or south, this equality will cease to exist. When the sun is north of the equator the days are longer than the nights in the northern hemisphere ; and when the sun is south of the equator the reverse of this is the case; and in the southern hemisphere,... | |
 | Robert Sullivan - 1884 - 510 pàgines
...recede from the equator, north or south, this equality will cease to exist. When the sun is fcorth of the equator the days are longer than the nights in the northern hemisphere ; and when the sun is south of the equator the reverse of this is the case; and in the southern hemisphere,... | |
 | 1890 - 896 pàgines
...north of the zenith for part of the year, and to the south for tho remainder. When the sun is to the north of the equator the days are longer than the nights in the northern hemisphere, while in tho southern hemisphere the nights are longer than the days ; when the sun has southern declination... | |
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