Astronomy:Primary direction
From HandWiki
Short description: Celestial coordinate system
Primary direction is a term in astronomy for the reference meridian used in a celestial coordinate system for that system's longitude.[1]
See also
References
- ↑ Gansten, Martin (2009). Primary directions : astrology's old master technique.. Bournemouth, Eng.: Wessex Astrologer. ISBN 978-1-902405-39-1. OCLC 320197873. https://www.worldcat.org/oclc/320197873.
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