Creating an interactive star map

In this section, we will use the Stereographic projection and a star catalog to create an interactive celestial map. The Stereographic projection displays the sphere as seen from inside. A star map created with the Stereographic projection is shown in the following screenshot:

Creating an interactive star map

Celestial coordinate systems describe positions of celestial objects as seen from Earth. As the Earth rotates on its axis and around the Sun, the position of the stars relative to points on the surface of the Earth changes. Besides rotation and translation, a third movement called precession slowly rotates the Earth's axis by one degree every ...

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