Planet Uriel: A planet whose inhabitants resemble winged centaurs. These aliens tend to be joyous. Planet Uriel's climate is quite similar to that of planet Earth. A being known as the Happy Medium resides here.
Planet Camazotz: A planet that symbolizes law and conformity. The being known as IT resides here. Margaret Murry ventures here to save her father, who was trapped here.
Planet Ixchel: Margaret and her friends visit this planet after she saves her father. Ixchel's terrain has frozen over, but the inhabitants, who themselves are called Ixchel, are kind.
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