Stellar dynamics is the research area within astrophysics that investigates the gravitational interactions, phase-space evolution, and collective behavior of stellar systems such as star clusters, galactic disks, and spheroidal components. It employs N-body simulations, kinetic theory (e.g., the Boltzmann and Vlasov equations), and perturbation methods to study relaxation processes, resonances, instabilities, and secular evolution driven by both collisional and collisionless effects. Stellar dynamics underpins quantitative models of mass distributions, dark matter inference from stellar kinematics, formation and survival of bound structures, and the dynamical impact of central massive black holes and external tidal fields on stellar systems.
Using the Anglo-Australian Telescope (AAT), astronomers have observed a nearby galactic globular cluster known as NGC 6569. Results of the observational campaign, published December 22 on the arXiv preprint server, indicate ...
Starlight and stardust are not enough to drive the powerful winds of giant stars, transporting the building blocks of life through our galaxy. That's the conclusion of a new study from Chalmers University of Technology, Sweden, ...
Astrobiology
Dec 22, 2025
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An international research team led by PD Dr. Florian Peissker at the University of Cologne has used the new observation instrument ERIS (Enhanced Resolution Imager and Spectrograph) at the Very Large Telescope (VLT) facility ...
Astronomy
Nov 28, 2025
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Using ESA's Gaia satellite, astronomers have detected 87 stellar streams associated with globular clusters (GCs) in our Milky Way galaxy. The discovery, which doubles the number of known GC stellar streams, was detailed in ...
White dwarfs are the compact remnants of stars that have stopped nuclear burning, a fate that will eventually befall our sun. These extremely dense objects are degenerate stars because their structure is counterintuitive: ...
Astronomy
Oct 14, 2025
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In the past decade, the European Space Agency's Gaia space telescope has revealed the nature, history, and behavior of billions of stars. Our pioneering stargazer has reshaped our view of the skies around us like no other, ...
Astronomy
Aug 26, 2025
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Macquarie University astronomers have tracked an extreme planet's orbital decay, confirming it is spiraling toward its star in a cosmic death dance that could end in three possible ways.
Astronomy
Jul 15, 2025
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Astronomers led by Simon Portegies Zwart used simulations to reconstruct how three stars were ejected from the star cluster R136, 60,000 years ago. The analysis, published in Physical Review Letters, reveals that five stars ...
Astronomy
Jul 15, 2025
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Researchers from the Xinjiang Astronomical Observatory (XAO) of the Chinese Academy of Sciences have made significant progress in understanding how three-dimensional (3D) layered structures form within open star clusters. ...
Astronomy
Jul 7, 2025
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If our solar system seems stable, it's because our short lifespans make it seem that way. Earth revolves, night follows day, the moon moves through light and shadow, and the sun hangs in the sky. But in reality, everything ...
Planetary Sciences
Jun 18, 2025
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