Suns in alchemy
Sun symbols have a variety of uses From Wikipedia, the free encyclopedia
In alchemical and Hermetic traditions, suns () are used to symbolize a variety of concepts, much like the Sun in astrology. Suns can correspond to gold, citrinitas, generative masculine principles, imagery of "the king", or Apollo, the fiery spirit or sulfur,[1] the divine spark in man,[2] nobility, or incorruptibility. Recurring images of specific solar motifs can be found in the form of a "dark" or "black sun", or a green lion devouring the Sun.

Sol niger

Sol niger (black sun) can refer to the first stage of the alchemical magnum opus, the nigredo (blackness). In a text ascribed to Marsilio Ficino three suns are described: black, white, and red, corresponding to the three most used alchemical color stages. Of the sol niger he writes:
The body must be dissolved in the subtlest middle air: The body is also dissolved by its own heat and humidity; where the soul, the middle nature holds the principality in the colour of blackness all in the glass: which blackness of Nature the ancient Philosophers called the crows head, or the black sun.
— Marsilius Ficinus, "Liber de Arte Chemica"[3]
The black sun is used to illuminate the dissolution of the body, a blackening of matter, or putrefaction in Splendor Solis,[4] and Johann Daniel Mylius’s Philosophia Reformata.[5]
See also

References
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