During the late stages of stellar evolution, massive stars burn helium to carbon, oxygen, silicon, sulfur, and iron. Elements heavier than iron are produced in two ways: in the outer envelopes of super-giant stars and in the explosion of a supernovae. Nucleosynthesis in Stars Elements heavier than lithium are all synthesized in stars. Stellar nucleosynthesis is the only theory we currently have that involves laboratory tested physics that could explain that. The primal abundance of elements provides evidence for the Big Bang by indicating that the Universe was briefly hot enough for nucleosynthesis to occur. In a short time interval, protons and neutrons collided to produce deuterium (one proton bound to one neutron). Fusion inside stars transforms hydrogen into … In fact, the established field of neutrino oscillations was born by looking at the discrepancy between predictions and observations surrounding solar neutrinos. nucleosynthesis, or the production of light elements, could take place. Wikipedia claims that supernovas can expel material at velocities of up to 3 × 10 7 m/sec, or about 10% the speed of light. All of the atoms in the universe began as hydrogen.
7 The primary nuclei present in the supernova debris would be lighter elements such as hydrogen and helium.
Most of the deuterium then collided with other protons and neutrons to produce helium … Direct evidence involves detection of solar neutrinos. Stellar nucleosynthesis is the process by which elements are created within stars by combining the protonsand neutronstogether from the nuclei of lighter elements. A probe to nucleosynthesis in our Galaxy is given by the chemical abundances in the solar system which testify for their abundance at the time of formation of the solar system. Evidence of nucleosynthesis in other stars has been discovered in S-Type stars by Merrill (1952). 6 A paper on this claim is cited in reference 7, but no direct evidence supporting it was found.
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