what is the internal structure of a star on the asymptotic-giant branch?
2011
What is the internal structure of a star on the asymptotic giant branch? The star has a carbon core in which a small amount fuses with helium to form oxygen. Around the core, helium continues to fuse into carbon, and outside this region, hydrogen fuses into helium.
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Characteristics of Stars. The five characteristics used to classify stars are color, temperature, size, composition, and brightness. A stars color depends on its temperature. Super Giants are very large stars, and use their hydrogen very fast and die young.
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What is the difference between stars and galaxies? ... A star is a small (relatively) ball of plasma that is generally sufficiently gravitationally compacted to initiate nuclear fusion in its core. A galaxy is about 10 billion or more of the above, all gravitationally bound to each other.
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It's approximate mass is 5b solar masses. Such giant stars typically only live thousands of years, so being 5,100 light years away, it could already have exploded and may now be a black hole.
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Most stars are classified as dwarfs, including the Sun. These stars lie on the main sequence, the phase of life in which a star steadily converts the hydrogen fuel in its core to helium. When the core hydrogen has been depleted, the star gets larger, cooler, and brighter.
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Answer 4: A star is generally defined by its ability to generate light via nuclear (fusion) reactions that convert hydrogen into helium. Planets are formed from the collection of gas and dust that surrounds a star.
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Like low-mass stars, high-mass stars are born in nebulae and evolve and live in the Main Sequence. However, their life cycles start to differ after the red giant phase. A massive star will undergo a supernova explosion.
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For low-mass stars (left hand side), after the helium has fused into carbon, the core collapses again. As the core collapses, the outer layers of the star are expelled. A planetary nebula is formed by the outer layers. ... Like low-mass stars, high-mass stars are born in nebulae and evolve and live in the Main Sequence.
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A star during most of its life is a main-sequence star, which consists of a core, radiative and convective zones, a photosphere, a chromosphere and a corona.
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What are stars made of? Basically, stars are big exploding balls of gas, mostly hydrogen and helium. ... Scientists think that the core of the Sun is a 15 million degree Celsius plasma, a soup of electrons and protons that are stripped from hydrogen atoms.
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Main sequence stars fuse hydrogen atoms to form helium atoms in their cores. About 90 percent of the stars in the universe, including the sun, are main sequence stars. These stars can range from about a tenth of the mass of the sun to up to 200 times as massive. Stars start their lives as clouds of dust and gas.
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The stars mass (once it becomes a star) is inversely proportional to its lifetime as a main sequence star. A red dwarf can survive for many billions of years; a star that has twice the mass of the Sun, such as Sirius A, will have 25% of the Suns lifetime.
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The generally accepted difference is one of formation; stars are said to have formed from the "top down", out of the gases in a nebula as they underwent gravitational collapse, and thus would be composed almost entirely of hydrogen and helium, while planets are said to have formed from the "bottom up", from the ...
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['The Sun. At the centre of the solar system lies the Sun. ... ', 'Planets and their satellites. ... ', 'Asteroids, meteoroids, comets, and interplanetary dust. ... ', 'Origin of the solar system. ... ', 'Extrasolar planetary systems. ... ', 'Main-sequence structure of the stars. ... ', 'The end states of stars. ... ', 'The evolution of stars.']
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Giant stars have radii up to a few hundred times the Sun and luminosities between 10 and a few thousand times that of the Sun. Stars still more luminous than giants are referred to as supergiants and hypergiants.
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['Very high-core temperatures.', 'Crushing stellar-core pressures.', 'Very big and very bright,', 'Ends its stellar life with a bang.']
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A star is a big ball of gas. ... They are made of gases and dust. A star's color tells us how hot or cold it is. The bluish stars are the hottest ones.