<human>:  What is the difference between a sun salutation and an moon salutation?
<bot>: The sun salutation is a series of postures performed in sequence as a form of physical activity, usually done in the morning. The postures in a sun salutation involve stretching and having a constant flow of movement which resembles the movements of the sun. The moon salutation is a similar series of postures that are usually practiced at night, to help relieve stress and tension. The postures in the moon salutation involve slower movements, usually held for a longer period of time and a calmer fluidity. Both the sun salutation and the moon salutation are designed to help people maintain a healthy lifestyle.