Rembangan: Perbezaan antara semakan
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Baris 20:
== Matahari ==
Generally, the sun is visible at its upper culmination (at noon) and not visible at its lower culmination (at midnight). But near the [[North Pole]] or [[South Pole]] during the winter of that hemisphere, the sun is below the horizon at both of its culminations.
Assume that on a given summer day the declination of the Sun is +20°. The [[complementary angles|complementary angle]] of 70° (from the sun to the pole) is added or subtracted from the observer's latitude to find the upper and lower culminations:
* At a latitude of 52°N, the upper culmination is at 58°, in the south, and the lower culmination is −18°, below the horizon, in the north. This is calculated as 52°+70°=122° (the [[supplementary angles|supplementary angle]] being 58°) for the upper, and 52°-70°=−18° for the lower.
* At a latitude of 80°N the upper culmination is at 30°, in the south, and the lower at 10°, also above the horizon ([[midnight sun]]), in the north.
== Polaris ==
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