"If there's one thing we can be certain of when we look out at the glittering canopy of the night sky, it's this: that someday, all of those luminous points of light, including every star and every galaxy, will someday fade away and cease to shine. The stars and stellar remnants, the primary sources of light and heat and energy that propagate throughout the Universe, are only powered by finite sources of fuel: whether through nuclear fusion, gravitation, or any other mechanism."
""I was reading one of your articles about the lifespan of red dwarf stars, with the smallest living anywhere from 20 trillion to 380 trillion years as a theoretical limit. There isn't very much information I can find on the internet about what influences the lifespan, so I was wondering how much metallicity affects the lifespan of the star, and what factors overall play into the theoretical limit for red dwarf longevity?""
"When a new star is born, if it remains in isolation (i.e., doesn't merge or interact with any other massive objects, like other stars), nearly everything about its future history can be calculated. Like anything physical, a star's physical properties are primarily determined by its composition. Its mass is the most important factor in determining both its lifetime and its fate, with other secon"
Stars and stellar remnants are powered by finite fuel sources such as nuclear fusion and gravitation and will eventually exhaust those fuels and cease shining. Fuel exhaustion will leave once-brilliant objects dark. Stellar lifetimes vary widely; some stars live briefly while others can shine far beyond the Universe's current 13.8 billion-year age. The smallest red dwarf stars have theoretical lifetimes of roughly 20 trillion to 380 trillion years. A star born and remaining in isolation has an evolution that can be nearly calculated from its properties. Stellar physical properties are primarily set by composition, and mass is the dominant factor determining lifetime and fate.
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