what elements are in the massive star
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Massive Star: Definition, Facts & Life Cycle Leaving Main Life Sequence. When a massive star has expended all of its core hydrogen, this means that the gravitational forces pushing inward will overcome the fusion forces which had been pushing outward. The outer layers of the star will then compact inwards.
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Sun About three quarters of the Sun's mass consists of hydrogen; the rest is mostly helium, with much smaller quantities of heavier elements, including oxygen, carbon, neon and iron. The Sun is a G-type main-sequence star (G2V) based on spectral class and it is informally referred to as a yellow dwarf.It formed approximately 4.567 billion years ago from the gravitational collapse of matter within a region of a large molecular cloud.bout three quarters of the Sun's mass consists of hydrogen; the rest is mostly helium, with much smaller quantities of heavier elements, including oxygen, carbon, neon and iron. The Sun is a G-type main-sequence star (G2V) based on spectral class and it is informally referred to as a yellow dwarf.
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Stars Neutron Stars. If the collapsing stellar core at the center of a supernova contains between about 1.4 and 3 solar masses, the collapse continues until electrons and protons combine to form neutrons, producing a neutron star. Neutron stars are incredibly dense - similar to the density of an atomic nucleus. Because it contains so much mass packed into such a small volume, the gravitation at the surface of a neutron star is immense. Like the White Dwarf stars above, if a neutron star forms in a multiple star system it can accrete gas by stripping it off any nearby companions. The Rossi X-Ray Timing Explorer has captured telltale X-Ray emissions of gas swirling just a few miles from the surface of a neutron star.
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Stars great and small, and their life cycles Stars are fuelled by the nuclear fusion reactions at their core. There is a dynamic equilibrium maintained throughout the star’s life between the expanding heat of the reactive core and gravitational forces holding the star together. Fusion produces extremely high energy.
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- The star settles onto the main sequence, where it will fuse hydrogen in its core for 10 billion years. When the core hydrogen is used up, the core contracts until it is degenerate, hydrogen fusion continues in a shell outside the core, and the outer layers expand and cool the star becomes a red giant.
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Stars Stars are the most widely recognized astronomical objects, and represent the most fundamental building blocks of galaxies. The age, distribution, and composition of the stars in a galaxy trace the history, dynamics, and evolution of that galaxy.tars are fueled by the nuclear fusion of hydrogen to form helium deep in their interiors. The outflow of energy from the central regions of the star provides the pressure necessary to keep the star from collapsing under its own weight, and the energy by which it shines.
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Making the Elements in the Universe When these stars with all of these heavy elements in them die, they spread their elements all throughout their galaxy; everything on planet Earth, with the possible exception of some hydrogen, was once part of a star. Not only that, but every element on Earth, again with the exception of hydrogen, was made in a star.
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Stars Neutron Stars If the collapsing stellar core at the center of a supernova contains between about 1.4 and 3 solar masses, the collapse continues until electrons and protons combine to form neutrons, producing a neutron star. Neutron stars are incredibly dense - similar to the density of an atomic nucleus.
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- 1 Hydrogen. Hydrogen is by far the most common and abundant element in the entire known universe. It makes up almost three-quarters of stars and it makes up two-thirds of a water molecule. And, when split, a single atom of hydrogen can create nuclear explosions large enough to level entire cities in a matter of seconds.
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supernova supernova, a massive star in the latter stages of stellar evolution that suddenly contracts and then explodes, increasing its energy output as much as a billionfold. Supernovas are the principal distributors of heavy elements throughout the universe; all elements heavier than iron are produced in supernovas.upernova, a massive star in the latter stages of stellar evolution that suddenly contracts and then explodes, increasing its energy output as much as a billionfold. Supernovas are the principal distributors of heavy elements throughout the universe; all elements heavier than iron are produced in supernovas.
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Post-Main Sequence Stars Whilst a massive star may spend a few million years on the main sequence, its helium core-burning phase may be a few hundred thousand years. The carbon burning phase lasts a few hundred years, neon-burning phase a year, oxygen-burning half a year and the silicon-burning only a day.
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- Submit. · just now. Report Abuse. The elements that fuse in a star are hydrogen, helium, carbon, oxygen, neon, silicon, and iron. Iron will kill a star in seconds, and will cause it to go into supernova, or create a neutron star or a black hole.Caty · 4 years ago. just now. Report Abuse. The elements that fuse in a star are hydrogen, helium, carbon, oxygen, neon, silicon, and iron. Iron will kill a star in seconds, and will cause it to go into supernova, or create a neutron star or a black hole. Caty · 4 years ago.
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- [/caption] Our Sun is a star. It’s a vast ball made up of 74% hydrogen and 24% helium, with trace amounts of other elements. It has so much mass that the temperatures and pressures at its core are hot enough to ignite fusion. At the core of the Sun (and other stars), atoms of hydrogen […]
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What elements are formed during a nova or supernova? It is the elements heavier than iron that are formed in a supernova. All the heavier elements up through uranium appear when a star of sufficient mass collapses in a supernova event.These heavier elements, sometimes referred to as the trans-iron elements, appear in the collapse of a massive star.ll the heavier elements up through uranium appear when a star of sufficient mass collapses in a supernova event. These heavier elements, sometimes referred to as the trans-iron elements, appear in the collapse of a massive star.
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Star The star's internal pressure prevents it from collapsing further under its own gravity. Once the hydrogen fuel at the core is exhausted, a star with at least 0.4 times the mass of the Sun expands to become a red giant, in some cases fusing heavier elements at the core or in shells around the core.
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Which periodic element can only be formed in supernova explosions? These other elements were produced inside stars and during supernova explosions, and were disbursed into the interstellar medium by supernova remnants.Eventually, the remnants cool and collapse to form interstellar clouds from which new stars and planets can be formed.Solution: Hydrogen and helium.hese other elements were produced inside stars and during supernova explosions, and were disbursed into the interstellar medium by supernova remnants. Eventually, the remnants cool and collapse to form interstellar clouds from which new stars and planets can be formed. Solution: Hydrogen and helium.
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- B) protostar, main-sequence star, red giant, supernova, neutron star . C) protostar, main-sequence star, planetary nebula, red giant . D) main-sequence star, white dwarf, red giant, planetary nebula, protostar . Answer: A. 4) What happens when a main-sequence star exhausts its core hydrogen fuel supply? A) The entire star shrinks in size. B) The core shrinks while the rest of the star expands.
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Star For stars with metallicity similar to the Sun, the theoretical minimum mass the star can have and still undergo fusion at the core, is estimated to be about 75 M J. When the metallicity is very low, however, the minimum star size seems to be about 8.3% of the solar mass, or about 87 M J.
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What are stars made of? So as the star dies, it begins to contain heavier elements like chlorine, and even carbon and iron. (In astronomy, all elements heavier than helium are called metals.) Stars that were born relatively recently started their lives containing some of these heavier elements, because the interstellar medium had been enriched by older stars that died, but they still contain mostly hydrogen.
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- This also means the massive stars (with masses greater than 1.4 solar masses) must shed most of their mass as planetary nebula or the final contraction to a white dwarf cannot be stopped by the degenerate electrons. If the mass can not be shed they will become neutron stars or black holes.hite dwarf stars are much smaller than normal stars, such that a white dwarf of the mass of the Sun is only slightly larger than the Earth. It was soon realized that the gas inside a white dwarf was too dense to behave as an ideal gas and, instead, was degenerate.
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Stars Having achieved iron, the star has wrung all the energy it can out of nuclear fusion - fusion reactions that form elements heavier than iron actually consume energy rather than produce it. The star no longer has any way to support its own mass, and the iron core collapses.
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"Physicist Finds Out Why ""We Are Stardust...""" And the heaviest elements -- such as gold, lead and uranium -- were produced in a supernova explosion during the cataclysmic end of a huge star's life, says LSU physicist Edward Zganjar. Share: FULL STORY. When Joni Mitchell, in her song Woodstock, sang, We are stardust... she was being factual as well as poetic. Every element on earth, except for the lightest, was created in the heart of some massive star. FULL STORY.
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The Life of a Star Massive stars have a mass 3x times that of the Sun. Some are 50x that of the Sun. Stage 1 - Massive stars evolve in a simlar way to a small stars until it reaces its main sequence stage (see small stars, stages 1-4).The stars shine steadily until the hydrogen has fused to form helium (it takes billions of years in a small star, but only millions in a massive star).he star expands to a Red Giant, below. Stage 8 - The helium core runs out, and the outer layers drift of away from the core as a gaseous shell, this gas that surrounds the core is called a Planetary Nebula.
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Red Giant Stars: Facts, Definition & the Future of the Sun A main sequence star may have a mass between a third to eight times that of the sun and eventually burn through the hydrogen in its core. Over its life, the outward pressure of fusion has balanced against the inward pressure of gravity.
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government (Government, Politics & Diplomacy) a monarchy governed according to a constitution that limits and defines the powers of the sovereign. Also called: limited monarchy. a system in which the powers of a monarch are defined and limited by law.