// Astrology glossary · Houses
Communication
The third house rules everyday thinking and everything that happens close to home: daily communication, logical and concrete thought, short journeys, and the immediate environment. It encompasses siblings, neighbors, and early childhood companions. Its natural sign is Gemini and its natural planet is Mercury, which gives it speed, curiosity, and a gift for connecting ideas. Here you can read how you process day-to-day information, how you express yourself verbally and in writing, and what kind of intellectual exchange feels natural to you. It also describes your relationship with siblings and with foundational early learning. This is the house of dialogue, of data, of fluid exchange, and of a mind that observes the immediate surroundings with attentiveness.
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