 ... most curious effects of atmospheric refraction is the oval form of the disks of the sun and moon, when near the horizon. This arises from the unequal refraction of the upper and lower limbs. The latter being nearer the horizon is more affected by...  A Treatise on Astronomy - الصفحة 53بواسطة Elias Loomis - 1866 - عدد الصفحات: 338عرض كامل - لمحة عن هذا الكتاب
 | Dionysius Lardner - 1854 - عدد الصفحات: 870
...latter being nearer the horizon is more affected by refraction, and therefore raised in a greater degree than the upper limb, the effect of which is to bring...by the difference between the two refractions. The form of the disk is therefore affected as if it were pressed between two forces, one acting above,... | |
 | Dionysius Lardner - 1853 - عدد الصفحات: 960
...latter being nearer the horizon is more affected by refraction, and therefore raised in a greater degree than the upper limb, the effect of which is to bring...by the difference between the two refractions. The form of the disk is therefore affected as if it were pressed between two forces, one acting above,... | |
 | Dionysius Lardner - 1858 - عدد الصفحات: 912
...latter being nearer the horizon is more affected by refraction, and therefore raised in a greater degree than the upper limb, the effect of which is to bring...by the difference between the two refractions. The form of the disk is therefore affected as if it were pressed between two forces, one acting above,... | |
 | Dionysius Lardner - 1860 - عدد الصفحات: 614
...latter being nearer the horizon is more affected by refraction, and therefore raised in a greater degree than the upper limb, the effect of which is to bring...by the difference between the two refractions. The form of the disk is therefore affected as if it were pressed between two forces, one acting above,... | |
 | Elias Loomis - 1870 - عدد الصفحات: 274
...of the Sun's Disk. — When the sun is near the horizon, the lower limb, having the least altitude, is most affected by refraction, and therefore more elevated than the upper limb, and thus the vertical diameter is shortened, while the horizontal diameter remains sensibly the same.... | |
 | Elias Loomis - 1893 - عدد الصفحات: 374
...passing through the star. Then, in the triangle ZPS, PZ = the complement of the latitude, PS = the north polar distance of the star, and ZPS = the angular...an ellipse, of which the major axis is horizontal. Our judgment of the absolute magnitude of a body is based upon our judgment of its distance. If two... | |
 | Elias Loomis - 1897 - عدد الصفحات: 264
...of the Sun's Disk. — When the sun is near the horizon, the lower limb, having the least altitude, is most affected by refraction, and therefore more elevated than the upper limb, and thus the vertical diameter is shortened, while the horizontal diameter remains sensibly the same.... | |
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