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Dictionary of Astrological and Astronomical Terms

Compiled by Julene Packer-Louis, Evan Bortnick, and Jackie Goldstein

Copyright 2000-2019 OCA, Inc. All rights reserved. No portion of the dictionary may be reproduced in any form without written permission.



Half of the traditional orb of a planet. The orb of a planet is the diameter of an imaginary sphere of light surrounding the planet. The moiety is the radius of that sphere. When the sphere of light around one planet is able to touch the sphere of light around another planet by conjunction or major aspect so that there is a blending of the light from the two planets, then the aspect between the planets is considered to be in effect. The sum of the moieties of the two planets gives the maximum distance the two planet's bodies can be from exact aspect for the aspect to be effective. Today we call this sum of moieties the orb of the aspect.

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