A Moon Salutation, Lunar Flow, or Chandra Namaskar, is the opposite of a Sun Salutation. Where the Sun Salutation brings heat and energy into the body, the Moon Salutation brings calm and relaxation. The Lunar Flow provides a counter-balance to the Sun Salutation and is often done at an evening Hatha Yoga session or on the occasions of the new and full moons.
The calming results of the practice are incredibly potent.