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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.



Comes from the Greek, meaning "a wanderer." To the naked eye, a planet appears to be little more than a bright point of light having much the same appearance as any of the stars. However, one will notice that the planets do not 'twinkle.'

They can be located in the night sky by using their sidereal zodiacal position. Venus and Jupiter are the brightest. Mars appears like a red star to the naked eye. Mercury can only be seen every other month when at its greatest eastern or western elongation, because it is simply too bright out to see it when it is any closer to the Sun.

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