what are stars made of

Introduction

Stars are fundamental celestial objects composed primarily of gas, undergoing nuclear fusion to produce light and heat. Understanding their composition has been a significant scientific endeavor, revealing insights into the universe's evolution and the processes within stars.

Key Insights

Hydrogen and Helium Dominance:
- Stars are primarily composed of hydrogen and helium, with hydrogen being the most abundant element .
Quark Matter and Dark Matter:
- Some compact stars may consist of quark matter and dark matter, with their properties influenced by the interactions between these components .
Formation and Evolution:
- Stars form from clouds of gas, primarily hydrogen and helium, which collapse under gravity, leading to nuclear fusion .
Chemical Composition and Nuclear Processes:
- The chemical composition of stars is studied through spectroscopy, revealing the presence of various elements produced by nuclear processes within stars.
Exotic Matter in Stars:
- Certain stars, such as strange stars, may contain exotic matter like strange quarks, contributing to their unique properties .

Conclusion

Stars are predominantly made of hydrogen and helium, with hydrogen being the most abundant element. They form from gas clouds that collapse under gravity, initiating nuclear fusion. Some stars may also contain exotic matter, such as quark matter and dark matter, influencing their structure and stability. Advances in spectroscopy and nuclear physics have significantly enhanced our understanding of the chemical composition and processes within stars.

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What are stars made of

Summary

Introduction

Key Insights

Conclusion

Sources and full results

Quark stars admixed with dark matter

The maximum stable total mass of compact stars made of quark matter and fermionic dark matter decreases linearly with an increasing dark matter fraction.

Sexism and the stars

Cecilia Payne-Gaposchkin's discovery that stars are composed of a million times more hydrogen than previously assumed led to a scientific revolution, but her gender and age hindered her acceptance by the scientific community.

Nonstrange hybrid compact stars with color superconducting matter

Nonstrange hybrid compact stars with color superconducting quark matter can be realistically constructed, with a globally neutral mixed phase and two-flavor color superconducting phase in the core.

Elements of Stars

Stars are made of hydrogen and helium, with a broad understanding of their chemical composition and implications for the evolution of the cosmos.

星の生命 : The lives of the stars

Stars are dynamic, ever changing rotating celestial objects made of gas, mostly hydrogen and helium, formed in clusters, from clouds of gas pulled together by gravity when, under immense pressure and heat, fusion occurs, signaling the birth of the star.

The physics of star formation

Star formation involves gravitational collapse in molecular clouds, with most stars forming in binary systems, and the most massive stars may form through violent interactions and mergers.

Strange Stars in the Color-Flavor Locked Phase

New models for compact stars made of strange matter show promising results for mass, density, and stellar radius, suggesting they could be considered as strange stars.

HST STAR COUNTS AT HIGH GALACTIC LATITUDES

The HST star counts constrain the amount of dark matter in the Galaxy, indicating that more than 25% of the massive dark halo is made up of low-mass main sequence stars or white-dwarfs.

Compact stars made of fermionic dark matter

Compact stars made of free fermions have a unique mass-radius relation independent of fermion mass, while strongly interacting fermions maintain a constant radius for a wide range of masses.

Dark stars: a review

Dark stars, powered by dark matter annihilation, may have been the first phase of stellar evolution in the history of the Universe.

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