Stellar evolution as a research area investigates the physical processes governing the formation, structural changes, and end states of stars across cosmic time, using stellar structure theory, nuclear astrophysics, hydrodynamics, and radiative transfer. It encompasses modeling of protostellar collapse, main-sequence hydrogen burning, post–main-sequence shell burning, and advanced nucleosynthesis up to core collapse or thermonuclear disruption, as well as mass loss, rotation, magnetic fields, and binary interactions. The field integrates observations (e.g., HR diagrams, asteroseismology, stellar populations) with numerical simulations to constrain stellar lifetimes, remnant formation (white dwarfs, neutron stars, black holes), and the chemical and energetic feedback of stars into galaxies.
The universe is decaying much faster than thought. This is shown by calculations of three Dutch scientists on the so-called Hawking radiation. They calculate that the last stellar remnants take about 1078 years to perish. ...
Astronomy
May 12, 2025
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An international team of astronomers has investigated a newly detected Type II supernova designated SN 2024jlf. The new study, detailed in a paper published Jan. 30 on the arXiv pre-print server, yields important information ...
An international research team led by the Yunnan Observatories of the Chinese Academy of Sciences has made significant advancements in the observational study of the metamorphic supernova SN 2014C. Their work provides crucial ...
Astronomy
Feb 10, 2025
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56
Once upon a time, the core of a massive star collapsed, creating a shockwave that blasted outward, ripping the star apart as it went. When the shockwave reached the star's surface, it punched through, generating a brief, ...
Astronomy
Jan 14, 2025
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Life on Earth could not exist without carbon. But carbon itself could not exist without stars. Nearly all elements except hydrogen and helium—including carbon, oxygen and iron—only exist because they were forged in stellar ...
Astronomy
Jan 3, 2025
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Almost 300 binary mergers have been detected so far, indicated by their passing gravitational waves. These measurements from the world's gravitational wave observatories put constraints on the masses and spins of the merging ...
The star HD 65907 is not what it appears to be. It's a star that looks young, but on closer inspection, it is actually much, much older. What's going on? Research suggests that it is a resurrected star.
Astronomy
Dec 19, 2024
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A new article published in Universe describes an approach that looks back from the deaths of stars to their births, allowing the so-called initial mass function (IMF), i.e. the way in which star masses are distributed after ...
Astronomy
Dec 18, 2024
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A study of more than 26,000 white dwarf stars has confirmed a long-predicted but elusive effect in these ultra-dense, dying stars: Hotter white dwarfs are slightly puffier than cooler ones, even when they have the same mass.
Astronomy
Dec 18, 2024
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Since antiquity, wreaths have symbolized the cycle of life, death, and rebirth. It is fitting then that one of the best places for astronomers to learn more about the stellar lifecycle resembles a giant holiday wreath itself.
Astronomy
Dec 17, 2024
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