Jupiter- Moon Yoga
Guru Chandra (Guru Chandi / Chandee)
गुरू-चन्द्र / गुरू-चाँदी योग
When Jupiter is in conjunction /1st quadrant from Moon it is Guru Chandra Yoga (and by default it is Gaja Kesari) and Jupiter in other quadrants from Moon i.e. 4th (fourth), 7th (seventh) and 10th (tenth) then it is termed Gaja-kesari Yoga.
It is the most elevated yoga among all types of Gaja Kesari Yoga. Ancient Scholars had further deciphered this as Guru Chandra Yoga. And example of this kind of Gaja Kesari one could see in the horoscope of lord Rama where Moon in own sign Cancer is in conjunction with exalted Jupiter. Click here to read full article about Guru Chandra Yoga.
In India Astrology Jupiter is called Guru or Brihaspati by virtue of being in Guru of Devtas the Gods. The word Guru in Sanskrit means big, large. In Astrology Dev Guru Brahaspati (Jupiter) is planet for Knowledge, wisdom, eloquence and righteousness. Chaandee (Silver) is in reference to Moon. In Urdu and Hindi Moon is called Chaand (चाँद). In Hindi and Urdu languages have adjectives for moonlight chandani. In Hindi word for silver is Chandi/ Chandee and has derived its name from Chaand word. In astrology Guru Chaandee Yoga means Guru Chandra Yoga. In other words conjunction of Jupiter and Moon.
Why this conjunction is so auspicious:
Jupiter becomes exalted in Zodiac Cancer. Moon is the owner of Cancer sign.
Jupiter and Moon are friend planets. (Adimitra).
Both the planets are natural benefic (Shubha Graha)
In association Jupiter and Moon enhances each others effect.