Astronomical Triangle

An astronomical triangle is a spherical triangle formed on the celestial sphere by the intersection of two lines of sight and a celestial object’s position. It involves three points: the observer’s location, the celestial object, and a reference point like the celestial pole. Using measurements of angles between these points, astronomers apply spherical trigonometry to determine an object’s position in the sky — such as its altitude and azimuth — or to calculate distances and times related to celestial events. These triangles are fundamental tools in navigational astronomy and celestial navigation.