What specific radio source defines the zero point for the Galactic Coordinate System?
Answer
Sagittarius A* ($ ext{Sgr A}^{*}$)
The zero point of the GCS is defined by the location of Sagittarius A* ($ ext{Sgr A}^{*}$), the compact object believed to be the supermassive black hole at the heart of the Milky Way.
#Videos
Celestial Sphere - Galactic Coordinates - YouTube
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