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celestial coordinate system：天球坐标系详图：

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1	celestial coordinate system	天球坐标系
	Imaginary horizontal and vertical lines used to describe the position of an object on the celestial sphere. 用来描述天体在天球上的位置的假想的水平线和垂直线。
2	North celestial pole	北天极,天球北极
	Projection of the North terrestrial pole onto the celestial sphere. 地球北极在天球上的投影。
3	declination [ˌdeklə’neɪʃən]	赤纬
	One of two coordinates used to locate a celestial body on the celestial sphere; similar to terrestrial latitude. 在天球上定位天体的两个坐标之一；类似于地球纬度。
4	ecliptic [ɪ’klɪptɪk]	黄道
	Projection of the Sun’s apparent annual path onto the celestial sphere. 太阳明显的年运行轨迹在天球上的投影。
5	right ascension	赤经
	One of two coordinates used to locate a celestial body on the celestial sphere; similar to terrestrial longitude. 在天球上定位天体的两个坐标之一；类似于地球的经度。
6	celestial meridian	赤经圈
	Projection of a terrestrial meridian onto the celestial sphere. 地球子午线向天球的投影。
7	celestial sphere	天球,天体球
	Imaginary sphere where celestial bodies are observed and positioned. 天体被观测和定位的假想球。
8	celestial equator	天体赤道,天球赤道
	Projection of the terrestrial Equator onto the celestial sphere; serves as the point of origin for declinations. 地球赤道向天球的投影；用作赤纬的原点。
9	terrestrial sphere	地球圆球体
	Shape of Earth whose coordinates are projected onto the celestial sphere... Earth coordinate system 地球的形状，其坐标投影到天球上。地球坐标系
10	vernal equinox	春分点
	Point at which the ecliptic and the celestial equator intersect; serves as the point of origin for right ascensions. 黄道和天赤道相交的点；作为右上升的起点。
11	South celestial pole	天球南极,南天极
	Projection of the South terrestrial pole onto the celestial sphere. 南极向天球的投影。
12	Equator [ɪ’kweɪtər]	赤道
	Imaginary circle surrounding Earth at its widest circumference, dividing it into two hemispheres: the Northern hemisphere and the Southern hemisphere... grid system Earth coordinate system hemispheres 环绕地球最宽周长的假想圆，把地球分成两个半球：北半球和南半球。
13	inclination [ˌɪnklɪ’neɪʃn]	轨道倾角
	Angle formed between an imaginary line connecting the terrestrial poles and an imaginary line perpendicular to the ecliptic. 连接地极的虚线和垂直于黄道的虚线之间形成的角度。

1	celestial coordinate system	天球坐标系
	Imaginary horizontal and vertical lines used to describe the position of an object on the celestial sphere. 用来描述天体在天球上的位置的假想的水平线和垂直线。
2	celestial equator	天体赤道,天球赤道
	Projection of the terrestrial Equator onto the celestial sphere; serves as the point of origin for declinations. 地球赤道向天球的投影；用作赤纬的原点。
3	celestial meridian	赤经圈
	Projection of a terrestrial meridian onto the celestial sphere. 地球子午线向天球的投影。
4	celestial sphere	天球,天体球
	Imaginary sphere where celestial bodies are observed and positioned. 天体被观测和定位的假想球。
5	declination [ˌdeklə’neɪʃən]	赤纬
	One of two coordinates used to locate a celestial body on the celestial sphere; similar to terrestrial latitude. 在天球上定位天体的两个坐标之一；类似于地球纬度。
6	ecliptic [ɪ’klɪptɪk]	黄道
	Projection of the Sun’s apparent annual path onto the celestial sphere. 太阳明显的年运行轨迹在天球上的投影。
7	Equator [ɪ’kweɪtər]	赤道
	Imaginary circle surrounding Earth at its widest circumference, dividing it into two hemispheres: the Northern hemisphere and the Southern hemisphere... grid system Earth coordinate system hemispheres 环绕地球最宽周长的假想圆，把地球分成两个半球：北半球和南半球。
8	inclination [ˌɪnklɪ’neɪʃn]	轨道倾角
	Angle formed between an imaginary line connecting the terrestrial poles and an imaginary line perpendicular to the ecliptic. 连接地极的虚线和垂直于黄道的虚线之间形成的角度。
9	North celestial pole	北天极,天球北极
	Projection of the North terrestrial pole onto the celestial sphere. 地球北极在天球上的投影。
10	right ascension	赤经
	One of two coordinates used to locate a celestial body on the celestial sphere; similar to terrestrial longitude. 在天球上定位天体的两个坐标之一；类似于地球的经度。
11	South celestial pole	天球南极,南天极
	Projection of the South terrestrial pole onto the celestial sphere. 南极向天球的投影。
12	terrestrial sphere	地球圆球体
	Shape of Earth whose coordinates are projected onto the celestial sphere... Earth coordinate system 地球的形状，其坐标投影到天球上。地球坐标系
13	vernal equinox	春分点
	Point at which the ecliptic and the celestial equator intersect; serves as the point of origin for right ascensions. 黄道和天赤道相交的点；作为右上升的起点。

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