ABSTRACT
The Mira variables are the most common of all of the intrinsic variable stars in our galaxy. They are very red, bright giants with radii several hundred times the radius of the sun and effective temperatures in the range 2000-2500 K. The visible light variations are large and quite regular with periods of 100-700 days [1]. The Mira appear to be stars in the last stages of stellar evolution near the tip of the giant branch in the H-R diagram. Planetary nebulae may be products of evolution from the more massive (~2 M ) Mira [2,3] that have ejected one or more shells of material.
