赤經

喺天球外面嚟睇嘅赤經（藍色）同赤緯（綠色）。

喺天文學入面，赤經（粵拼：cek3 ging1，Right ascension；符號α）係天文學用喺天球赤道座標系統度嘅座標值之一，通過天球兩極同天赤道垂直，另一個座標值係赤緯。

睇埋

• 赤緯

拎

• MEASURING THE SKY A Quick Guide to the Celestial Sphere James B. Kaler, University of Illinois
• Celestial Equatorial Coordinate System University of Nebraska-Lincoln
• Celestial Equatorial Coordinate Explorers University of Nebraska-Lincoln
• Merrifield, Michael. "(α,δ) – Right Ascension & Declination". Sixty Symbols. Brady Haran for the University of Nottingham.
• Sidereal pointer (Torquetum) – to determine RA/DEC.