How Astrologers Measure The Night Sky

When we look up at a clear starlit night sky we are gazing at a magnificent four-dimensional panorama. The crescent moon and the planets are set against the backdrop of a multitude of illuminated specks.  Each wandering star (as planets were termed by the ancient Greeks) can be tracked in two dimensions above and below the projected path of the Sun, which is known as the ecliptic.

 

How Astrologers Measure The Night Sky

 

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