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Evidence for PeVatrons, the Milky Way's most powerful particle accelerators

The Tibet ASγ experiment, a China-Japan joint research project on cosmic-ray observation, has discovered ultra-high-energy diffuse gamma rays from the Milky Way galaxy. The highest energy detected is estimated to be unprecedentedly high, nearly 1 Peta electronvolts. These gamma rays are spread out across the Milky Way. Scientists believe they are produced by the nuclear interaction between cosmic rays escaping from the most powerful galactic sources ( PeVatrons ) and interstellar gas in the Milky Way galaxy. ....

Milky Way , Crab Nebula , Space Planetary Science , பால் வழி , நண்டு நெபுலா , இடம் கிரகங்கள் அறிவியல் ,

NASA OSIRIS-REx's final asteroid observation run

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IMAGE: This artist s concept shows the planned flight path of NASA s OSIRIS-REx spacecraft during its final flyby of asteroid Bennu, which is scheduled for April 7.
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Credit: Credits: NASA/Goddard/University of Arizona
NASA s OSIRIS-REx mission is on the brink of discovering the extent of the mess it made on asteroid Bennu s surface during last fall s sample collection event. On Apr. 7, the OSIRIS-REx spacecraft will get one last close encounter with Bennu as it performs a final flyover to capture images of the asteroid s surface. While performing the flyover, the spacecraft will observe Bennu from a distance of about 2.3 miles (3.7 km) - the closest it s been since the Touch-and-Go Sample Collection event on Oct. 20, 2020. ....

United States , Goddard Space Flight Center , Dante Lauretta , Brittany Enos , Frontiers Program , Science Mission Directorate , Kinetx Aerospace , University Of Arizona , Marshall Space Flight Center , Johnson Space Center , Touch And Go Sample Collection , Detailed Survey , Thermal Emission Spectrometer , Infrared Spectrometer , Laser Altimeter , Return Cruise , Sample Return Capsule , Utah Test , Training Range , Space Flight Center , Martin Space , Space Planetary Science , Comets Asteroids , ஒன்றுபட்டது மாநிலங்களில் , கோடார்ட் இடம் விமானம் மையம் , தாந்தே லாரெட்டா ,

Distant, spiralling stars give clues to the forces that bind sub-atomic particles

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IMAGE: The physics of massive nuclei can be studied by measuring the note at which tidal resonance between merging neutron stars causes the solid crust of the neutron stars to shatter
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Credit: University of Bath
Space scientists at the University of Bath in the UK have found a new way to probe the internal structure of neutron stars, giving nuclear physicists a novel tool for studying the structures that make up matter at an atomic level.
Neutron stars are dead stars that have been compressed by gravity to the size of small cities. They contain the most extreme matter in the universe, meaning they are the densest objects in existence (for comparison, if Earth were compressed to the density of a neutron star, it would measure just a few hundred meters in diameter, and all humans would fit in a teaspoon). This makes neutron stars unique natural laboratories for nuclear physicists, whose understanding of the force that binds sub-atomi ....

United Kingdom , United States , David Tsang , Duncan Neill , Monthly Notices Of The Royal Astronomical Society , Texasam University , University Of Bath , Monthly Notices , Royal Astronomical Society , Resonant Shattering Flare , Will Newton , Chemistry Physics Materials Sciences , Atomic Molecular Particle Physics , Space Planetary Science , Atomic Physics , ஒன்றுபட்டது கிஂக்டம் , ஒன்றுபட்டது மாநிலங்களில் , டேவிட் ட்ஸ்யாஂக் , டங்கன் நீல் , மாதாந்திர அறிவிப்புகள் ஆஃப் தி அரச வானியல் சமூகம் , பல்கலைக்கழகம் ஆஃப் குளியல் , மாதாந்திர அறிவிப்புகள் , அரச வானியல் சமூகம் , அதிர்வு நொறுங்குகிறது விரிவடைய , விருப்பம் நியூட்டன் , வேதியியல் இயற்பியல் பொருட்கள் அறிவியல் ,

Ancient light illuminates matter that fuels galaxy formation

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ITHACA, N.Y. - Using light from the Big Bang, an international team led by Cornell University and the U.S. Department of Energy s Lawrence Berkeley National Laboratory has begun to unveil the material which fuels galaxy formation.
There is uncertainty on the formation of stars within galaxies that theoretical models are unable to predict, said lead author Stefania Amodeo, a Cornell postdoctoral researcher in astronomy in the College of Arts and Sciences, who now conducts research at the Observatory of Strasbourg, France. With this work, we are providing tests for galaxy formation models to comprehend galaxy and star formation. ....

New Mexico , United States , Simone Ferraro , Stefania Amodeo , Mike Niemack , Emmanuel Schaan , Stevek Choi , Emily Moser , Nick Battaglia , Lawrence Berkeley , Cornell Center , A National Science Foundation Astronomy , Baryon Oscillation Spectroscopic , Lawrence Berkeley National Laboratory , National Science Foundation , Cornell University , Berkeley Lab , College Of Arts , European Space Agency Planck , National Science Foundation Atacama Cosmology Telescope , Big Bang , Cosmology Telescope , Gas Thermodynamics , Thermal Sunyaev Zel Dovich Measurements , Physical Review , Atacama Cosmology Telescope ,

Jupiter's "dawn storm" auroras are surprisingly Earth-like | EurekAlert! Science News

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VIDEO: A study conducted by researchers from the Laboratory for Planetary and Atmospheric Physics of the University of Liege, shows for the first time global views of a dawn storm, a.
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Credit: @University of Liège
The storms, which consist of brightenings and broadenings of the dawn flank of an oval of auroral activity that encircles Jupiter s poles, evolve in a pattern surprisingly reminiscent of familiar surges in the aurora that undulate across Earth s polar skies, called auroral substorms, according to the authors.
The new study is the first to track the storms from their birth on the nightside of the giant planet through their full evolution. It was published today in ....

Joshua Kammer , Alberto Adriani , Benjamin Palmaerts , Bertrand Bonfond , Alessandro Mura , Zhonghua Yao , Barry Mauk Johns Hopkins University , Rohini Giles Southwest Research Institute , Scott Bolton Southwest Research Institute , Marissa Vogt Boston University , University Of Li , University Of Liege , Denis Grodent University Of Li , Jessy Matar University Of Li , Thomas Greathouse Southwest Research Institute , Vincent Hue Southwest Research Institute , Communications Technology , Zhonghua Yao Chinese Academy Of Sciences , Maarten Versteeg Southwest Research Institute , William Kurth University Of Iowa , Randy Gladstone Southwest Research Institute , Chihiro Tao National Institute Of Information , Hubble Space Telescope , Chinese Academy , Southwest Research Institute , National Institute ,