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[Antonio García Jiménez]

In his Occulta Philosophia, Agrippa compiles the ancient Hermetic current that most likely influenced the creation of the Voynich. According to him, the hidden virtues of natural things come from celestial influences. Plants, like stones, possess hidden powers because they receive them from the stars.

  In the Voynich Manuscript, the influences are transmitted by the fixed stars, more specifically the zodiacal stars. And the sun and the moon also seem to play a role.

I know that herbal astrology also used the other planets, but it's clear that for the authors of the Voynich they played no role.