Yahoo Canada Web Search

Search results

  1. Running Out Of Gas. As time goes on, the amount of hydrogen in the core decreases and the rate of fusion drops; this, in turn, causes the core to contract under the pressure of the star’s outer layers, which consequently results in a temperature increase outside of the core. When the pressure rises high enough, fusion of hydrogen in a ...

  2. When the core runs out of hydrogen, these stars fuse helium into carbon just like the sun. However, after the helium is gone, their mass is enough to fuse carbon into heavier elements such as oxygen, neon, silicon, magnesium, sulfur and iron. Once the core has turned to iron, it can burn no longer. The star collapses by its own gravity and the ...

    • Stellar Evolution
    • The Fate of Medium-Sized Stars
    • The Fate of Massive Stars

    A star is born, lives, and dies, much like everything else in nature. Using observations of stars in all phases of their lives, astronomers have constructed a lifecycle that all stars appear to go through. The fate and life of a star depends primarily on it's mass. All stars begin their lives from the collapse of material in a giant molecular cloud...

    When a medium-sized star (up to about 7 times the mass of the Sun) reaches the red giant phase of its life, the core will have enough heat and pressure to cause helium to fuse into carbon, giving the core a brief reprieve from its collapse. Once the helium in the core is gone, the star will shed most of its mass, forming a cloud of material called ...

    A red giant star with more than 7 times the mass of the Sun is fated for a more spectacular ending. These high-mass stars go through some of the same steps as the medium-mass stars. First, the outer layers swell out into a giant star, but even bigger, forming a red supergiant. Next, the core starts to shrink, becoming very hot and dense. Then, fusi...

  3. Sep 16, 2020 · A low-mass star has a mass eight times the Sun’s or less and can burn steadily for billions of years. As it reaches the end of its life, its core runs out of hydrogen to convert into helium. Because the energy produced by fusion is the only force fighting gravity’s tendency to pull matter together, the core starts to collapse.

  4. One-Solar Post-Main Sequence Evolution. Stars such as our Sun move off the main sequence and up the red giant branch (RGB), fusing hydrogen into helium in hydrogen shell burning. A very short helium flash sees the start of helium core fusion and the star moves along the horizontal branch (HB). Once shell temperature is sufficient, helium shell ...

  5. Jul 23, 2019 · The color of a star is defined by its temperature. The coolest stars appear red, while the hottest stars appear blue. When mid-sized stars, like the Sun, run out of hydrogen, their cores will contract and heat up. The outer layers of gas will expand and the stars will become red giant stars.

  6. People also ask

  7. Aug 2, 2024 · A star like the sun takes roughly 12 billion years to fuse all its core hydrogen into helium. If the star has enough mass, it’ll squeeze that helium hard enough to fuse it into carbon ...

  1. People also search for