In simple words
A birth chart is split into 12 houses, and each house is an area of life. The 12th house is about: solitude, dreams, retreat, compassion.
Planets sitting in this house in your chart bring their energy to this area of life. An empty house is normal; it still matters. Houses need your exact birth time.
What the 12th house covers
It covers solitude, spiritual life, hidden strengths and old patterns that operate quietly. Planets here are often expressed privately or later in life. Hospitals, retreats and charities belong here as places of care.
Growing through this house
Time alone is not wasted time. Rest, reflection and quiet service let what is hidden become a source of strength.
Planets in the 12th house
Sun in the 12th house. Your light shines from behind the scenes. With the Sun in the twelfth house, your strengths often work quietly.
Moon in the 12th house. You need quiet to hear your heart. With the Moon in the twelfth house, your feelings are sensitive and often hidden, even from yourself.
Mercury in the 12th house. A quiet, intuitive thinker. With Mercury in the twelfth house, much of your thinking happens privately.
Venus in the 12th house. A private, compassionate heart. With Venus in the twelfth house, love may be expressed quietly or kept private.
Mars in the 12th house. Quiet strength working behind the scenes. With Mars in the twelfth house, you may hold back anger or act indirectly.
Jupiter in the 12th house. Quiet blessings and inner wisdom. With Jupiter in the twelfth house, help often arrives from unseen places, and your faith grows in solitude.
Saturn in the 12th house. Inner discipline and quiet strength. With Saturn in the twelfth house, you may carry private worries or work hard behind the scenes.
Uranus in the 12th house. Hidden flashes of insight. With Uranus in the twelfth house, intuition and inspiration arrive from deep within, often unexpectedly.
Neptune in the 12th house. A deep, compassionate inner life. Neptune is at home in the twelfth house.
Pluto in the 12th house. Hidden depths and quiet power. With Pluto in the twelfth house, much of your strength works out of sight.