Stellar nucleosynthesis is the research area concerned with the nuclear processes by which chemical elements are formed and transformed within stars and related astrophysical environments. It encompasses hydrogen burning (pp-chains, CNO cycles), helium burning, advanced hydrostatic burning stages (carbon, neon, oxygen, silicon burning), and explosive nucleosynthesis in supernovae and neutron-star-related events. The field integrates nuclear reaction theory and measurements, stellar structure and evolution modeling, and observational constraints from stellar spectra and isotopic abundances. A central focus is quantifying reaction rates and yields to explain the origin and distribution of isotopes in the cosmos and to constrain models of stellar evolution and galactic chemical evolution.
Clues about how galaxies like our Milky Way form and evolve and why their stars show surprising chemical patterns have been revealed by a new study.
Astronomy
Dec 8, 2025
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"Why are we here?" is humanity's most fundamental and persistent question. Tracing the origins of the elements is a direct attempt to answer this at its deepest level. We know many elements are created inside stars and supernovae, ...
Astronomy
Dec 4, 2025
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All around us are elements forged in stars, from the nickel and copper in coins to the gold and silver in jewelry. Scientists have a good understanding of how these elements form: In many cases, a nucleus heavier than iron ...
Astronomy
Nov 18, 2025
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Is there anything more dramatic than an exploding star? More than just extraordinarily bright, energetic events that can light up the sky for months, these explosions play important roles in the cosmos. Supernovas create ...
Astronomy
Nov 4, 2025
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You can't have gold until a nucleus decays. The specifics of that process have been hard to pin down, but UT's nuclear physicists have published three discoveries in one paper explaining key details. The results can help ...
General Physics
Oct 22, 2025
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Not all stars are created equally. Astronomers believe that the first stars to form after the Big Bang were mostly made of only hydrogen and helium with trace amounts of lithium, as the heavier elements formed later on by ...
Stars have layers like onions, according to theory. The layers are made of different elements, progressing from light to heavy the deeper the layers are. While the theory is strong, observing the inner layers of a star has ...
Astronomy
Aug 27, 2025
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Astronomers at Leiden University have detected rare isotopes of carbon and oxygen in our neighboring stars for the first time, providing a new path toward better understanding the chemical evolution of the cosmos. The results ...
Astronomy
Aug 26, 2025
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For decades, astronomers have wondered what the very first stars in the universe were like. These stars formed new chemical elements, which enriched the universe and allowed the next generations of stars to form the first ...
Astronomy
Aug 25, 2025
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Astronomers have glimpsed the inner structure of a dying star in a rare kind of cosmic explosion called an "extremely stripped supernova."
Astronomy
Aug 24, 2025
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