The purpose of this grant to the University of California, Berkeley Department of Physics is to undertake further detailed studies of stellar characteristics by interferometry to expand and enrich our knowledge and understanding of stellar processes. Using the Infrared Spatial Interferometer, the investigators have already discovered a class of non-spherical stars, as well as one star, Betelgeuse, which has shrunk over 15% in size during the past 15 years. These startling observations cannot be explained by current models so future studies will continue to advance the field of stellar evolution theory.
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