Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. No longer do their interior nuclear fires burn , so they will continue to cool until they fade away. This Hubble Space Telescope image covers a small region near the center of a globular cluster known as M4 . This was expected - low mass stars, including the Sun, are believed to evolve to the white dwarf stage. Studying how these stars cool could lead to a better understanding of their ages, of the age of their parent globular cluster , and even the age of our universe .
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