翻訳と辞書
Words near each other
・ Position (vector)
・ Position Among the Stars
・ Position analysis questionnaire
・ Position and momentum space
・ Position angle
・ Position circle
・ Position Correction
・ Position effect
・ Position error
・ Position fixing
・ Position Ignition
・ Position line
・ Position of Lebanon in the 2006 Lebanon War
・ Position of the arms in ballet
・ Position of the media on the Armenian Genocide
Position of the Sun
・ Position of trust
・ Position operator
・ Position paper
・ Position player
・ Position resection
・ Position sensitive device
・ Position sensor
・ Position tolerance
・ Position weight matrix
・ Position-effect variegation
・ Position-independent code
・ Position-sensing hydraulic cylinder
・ Positional advantage
・ Positional alcohol nystagmus


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Position of the Sun : ウィキペディア英語版
Position of the Sun

The position of the Sun in the sky is a function of both time and the geographic coordinates of the observer on the surface of the Earth. As the Earth moves around the Sun during the course of the year, the Sun appears to move with respect to the fixed stars on the celestial sphere, along a path called the "ecliptic". The Earth's rotation about its axis causes the fixed stars to move in the sky in a way that depends on the observer's geographic latitude. The time when a given fixed star crosses the observer's meridian depends on the geographic longitude. To find the Sun's position for a given observer at a given time, one may therefore proceed in three steps:〔

* calculate the Sun's position in the ecliptic coordinate system,
* convert to the equatorial coordinate system, and
* convert to the horizontal coordinate system, for the observer's local time and position.
This calculation is useful in astronomy, navigation, surveying, meteorology, climatology, solar energy, and for designing sundials.
== Approximate position==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Position of the Sun」の詳細全文を読む



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