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In astrology, a natal chart is a stylized map of the universe with the "native" (the individual or subject or anything Created or Built to be studied) at the center. It is calculated for the exact time and location of the native's birth for the purposes of gaining insight into the native's personality and potential. Commonly used alternative names for the natal chart include birth chart, horoscope, natus, nativity, radix, geniture and genethliac chart, among others. The chart shows the positions of the sun, moon, planets, and potentially other celestial objects, all referred to as the native's "planets," within the frames of references defined by the astrological signs and houses. The accurate birth time (generally agreed upon as the first breath or intake of air) and location are deemed necessary by astrologers for the calculation of the exact degree of the signs that are rising, setting, culminating up, and culminating down, known respectively the ascendant (or "rising sign"), descendant, medium coeli (or "midheaven"), and imum coeli (or "lower midheaven"). These degrees, also known as the angles, are essential for mapping the positions of the native's twelve houses. ==Example== The picture to at the top of the page is a modern example of a natal chart as a modern Western astrologer would most likely view it (though this depends on the specific astrological tradition and personal preferences of the astrologer). In this example, a horizontal line through the middle of the chart roughly corresponds with the horizon, with the left side being the place where objects on the ecliptic are rising in the east (the ascendant). The sun is seen near the bottom, since the chart was made for midnight, in the sign Capricorn, since it was made for January 1. The design, along with the symbols/glyphs used in the chart, can vary widely; some choose to include the Zodiac wheel, while some do not. Also, charts do not have to be round—following the Hellenistic/Roman, medieval and/or Vedic styles, they can be square as well. The astrological aspects (such as conjunctions or oppositions, among others) are delineated in the center of the chart. The twelve signs of the Zodiac are located at the outer portion of the chart wheel; similarly, twelve segments of arc form astrological houses which are said to have significance for different areas of life. There are many different systems for calculating the houses. The sample chart uses a ''quadrant house'' system of house division whereby the angles of the chart divide the chart into four quadrants with three houses within each quadrant, and in which the houses usually include portions of more than one astrological sign. Each quadrant has an angular house, which includes one of the angles of the chart; a succedent house follows this, with a cadent house at the end of the quadrant. 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「Natal chart」の詳細全文を読む スポンサード リンク
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