In simple words
A birth chart is split into 12 houses, and each house is an area of life. The 7th house is about: partners, marriage, contracts, allies.
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 7th house covers
It covers committed relationships, business partners, agreements and the people you meet one to one, including rivals. Planets here make partnership a major theme. Its sign often describes qualities you seek in others, or are learning to own in yourself.
Growing through this house
Notice what you admire and what irritates you in close partners. Both point toward something you are ready to develop.
Planets in the 7th house
Sun in the 7th house. You find yourself through partnership. With the Sun in the seventh house, relationships are central to your growth.
Moon in the 7th house. You need closeness to feel whole. With the Moon in the seventh house, partnerships are an emotional necessity.
Mercury in the 7th house. Conversation is your connection. With Mercury in the seventh house, you seek partners who are mentally stimulating.
Venus in the 7th house. Partnership is your natural home. Venus is strong in the seventh house.
Mars in the 7th house. Passionate partnerships that spark. With Mars in the seventh house, relationships are lively and can be fiery.
Jupiter in the 7th house. Partnerships that help you grow. With Jupiter in the seventh house, relationships bring growth, generosity and opportunity.
Saturn in the 7th house. Committed, serious partnerships. With Saturn in the seventh house, you take relationships seriously and may commit later or to someone older or more established.
Uranus in the 7th house. Partners who bring the unexpected. With Uranus in the seventh house, you are drawn to unusual or independent partners, and relationships may begin or change suddenly.
Neptune in the 7th house. Ideal love and soulful partnerships. With Neptune in the seventh house, you seek a soulful, compassionate partner.
Pluto in the 7th house. Relationships that transform you. With Pluto in the seventh house, partnerships are intense and life-changing.