Chandra / the moon married Daksha 27 daughters. Chandra had rohini as his favorite. The other wife’s got upset, complained to daksha and Chandra was cursed to lose his Lustre
Chandra prayed to lord shiv for 4000 years and shiv gave him the ability to Wax and wane every 15 days
This story has a deep spiritual interpretation of the steps in meditation.
The Chandra is not the Chandra Nadi.
Bhavin