News tagged with gravitational interactions

Model of galaxy and star cluster formation corrected

When galaxy clusters and globular star clusters form, a phenomenon called "violent relaxation" occurs. After interacting intensely, the thousands or even millions of bodies reach a state of relative gravitational equilibrium ...

dateDec 04, 2017 in Astronomy
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Uncovering the origins of galaxies' halos

Using the Subaru Telescope atop Maunakea, researchers have identified 11 dwarf galaxies and two star-containing halos in the outer region of a large spiral galaxy 25 million light-years away from Earth. The findings, published ...

dateNov 21, 2017 in Astronomy
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Image: Prometheus and the Ghostly F Ring

The thin sliver of Saturn's moon Prometheus lurks near ghostly structures in Saturn's narrow F ring in this view from NASA's Cassini spacecraft. Many of the narrow ring's faint and wispy features result from its gravitational ...

dateAug 08, 2017 in Space Exploration
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Turbulence in planetary cores excited by tides

Veritable shields against high-energy particles, planets' magnetic fields are produced by iron moving in their liquid core. Yet the dominant model for explaining this system does not fit the smallest celestial bodies. Researchers ...

dateJul 24, 2017 in General Physics
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Image: Saturn's B-ring close-up

This image shows the incredible detail at which the international Cassini spacecraft is observing Saturn's rings of icy debris as part of its dedicated close 'ring grazing' orbits.

dateMar 20, 2017 in Space Exploration
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Hubble spots an irregular island in a sea of space

This image, courtesy of the NASA/ESA Hubble Space Telescope's Advanced Camera for Surveys (ACS), captures the glow of distant stars within NGC 5264, a dwarf galaxy located just over 15 million light-years away in the constellation ...

dateAug 29, 2016 in Astronomy
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Hubble spots a lopsided Lynx

This galaxy, known as NGC 2337, resides 25 million light-years away in the constellation of Lynx. NGC 2337 is an irregular galaxy, meaning that it—along with a quarter of all galaxies in the universe—lacks a distinct, ...

dateAug 15, 2016 in Astronomy
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Black holes might not be dead-ends after all

A physical body might be able to cross a wormhole in spite of the extreme tidal forces, suggests a new study by Rubiera-Garcia, of Instituto de Astrofísica e Ciências do Espaço (IA), and his team. This result, published ...

dateJun 08, 2016 in Astronomy
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