Other elements are produced in different ways, including in exploding massive stars and dying low mass stars. (sciencenews.org)
[47] For very low mass stars, molecules in the atmosphere also contribute to the opacity. (newworldencyclopedia.org)
At some point some of these AGB stars, which represent the distended last spherical stage in the lives of low mass stars, become «pre-planetary» nebula, which are aspherical. (sciencedaily.com)