University Catalog. Academic Majors. The university confers bachelor's degrees for completion of academic disciplines established by the faculties of the colleges of Agriculture and Natural Resources, Arts and Sciences, Business, Education, Engineering and Applied Science, and Health Sciences.
1 When a star exhausts the hydrogen in its core, it becomes a giant or supergiant. 2  sun become hot enough to fuse helium into carbon. 3  sun become hot enough to fuse carbon into heavier elements.
During most a star's lifetime, the interior heat and radiation is provided by nuclear reactions in the star's core. This phase of the star's life is called the main sequence. Before a star reaches the main sequence, the star is contracting and its core is not yet hot or dense enough to begin nuclear reactions. So, until it reaches the main sequence, hydrostatic support is provided by the heat generated from the contraction.