Surya Namaskara is sometimes called the Sun Salutation. It is a series of movements or asanas.
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For pictures of the cycle of poses, see http://www.ashtangayoga.info/practice/asana-vinyasa-series/surya-namaskara-a-sun-salutation/ or http://www.ashtangayoga.info/practice/asana-vinyasa-series/surya-namaskara-b-sun-salutation-b/