Tanja with Saraswathi, Pattabhi Jois daughter, in Mysore India
Ashtanga/ Astanga Yoga:
is an ancient system of yoga popularized by K. Pattabhi Jois.
Ashtanga (also spelled Astanga) means "eight limbs" in Sanskrit, which refers to the eight limbs of yoga laid out in the Yoga Sutras of Patanjali. The Ashtanga method of asana practice was interpreted by Krishnamacharya and Sri K. Pattabhi Jois from an ancient text called the Yoga Korunta, which described a unique system of hatha yoga developed by Vamana Rishi.
http://yoga.about.com/od/ashtangayoga/a/ashtangs.htm
This style of yoga is characterized by a focus on vinyasa, or a dynamic connecting posture, that creates a flow between the more static traditional yoga postures. Vinyasa translates as linking and the system also implies the linking of the movement to the breath. Essentially the breath dictates the movement and the length of time held in the postures. Unlike some Hatha yoga styles, attention is also placed on the journey between the postures not just the postures themselves. The viṅyāsa 'flow' is a variant of Surya namaskara, the Sun Salutation. The whole practice is defined by six specific series of postures, always done in the same order, combined with specific breathing patterns (Free breathing with the ujjāyī sound).
About the Ashtanga Series of Poses
The first or primary series, called Yoga Chikitsa, is described in Yoga Mala. Yoga Chikitsa, which means yoga therapy, realigns the spine, detoxifies the body, and builds strength, flexibility and stamina. The series of about 75 poses takes an hour and a half to two hours to complete, beginning with sun salutations (surya namaskara A and surya namaskara B) and moving on to standing poses, seated poses, inversions and backbends before relaxation.
The intermediate or second series is called Nadi Shodana, meaning nervous system purification. It cleanses and strengthens the nervous system and the subtle energy channels throughout the body. This series is only introduced when the primary series is strong. It follows the same progression (sun salutations, standing, sitting etc.) as the primary series, but introduces new poses and variations.
The four advanced series are called Sthira Bhaga, which means divine stability. Pattabhi Jois originally outlined two intensive advanced series, but later subdivided them into four series to make them accessible to more people. These series emphasize difficult arm balances and are only appropriate for extremely advanced students.

Tanja with Kino MacGregor in Mysore India infront of Ashtanga Yoga Institute.
