The planet associated with the brain, according to some classical systems, is the Moon.
The relationship between planets and various organs is rooted in traditional systems like astrology and alchemy. While not scientifically accurate, these systems assigned specific planets to different parts of the body. In this context:
- Moon: Associated with the brain.
- Mercury: Associated with the lungs.
- Venus: Associated with the kidneys.
- Mars: Associated with the gallbladder.
This association is derived from historical and symbolic interpretations, not modern medical science. Therefore, it's crucial to understand that this is purely within the framework of these belief systems and has no basis in scientific fact.