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Chart foundations

What counts as a stellium in astrology?

A stellium is a concentration of planets in one sign or house, but astrologers differ on planet count, allowable span, and whether the Sun, Moon, or points count.Reviewed · 2026-08-24 · Educational astrology content
Direct answer

A stellium generally means several planets concentrated in one sign or house. There is no universal definition: some astrologers require three planets, others four, and some require close conjunctions rather than simple sign membership.

Key points

  • State the definition before declaring a stellium.
  • Three widely separated planets may not act like one conjunction cluster.
  • Angles and lunar nodes are not planets.
  • A house stellium depends on accurate birth time and house system.

Method

  1. List only astronomical planets first.
  2. Check degree spacing and conjunction links.
  3. Interpret the shared sign or house after the individual planets.

Limits and responsible use

  • A stellium does not make every other chart factor irrelevant.
  • Definitions should not be adjusted to force a dramatic label.