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Nearby gamma-ray burst defies expectations -- Science & Technology -- Sott.net


© DESY, Science Communication Lab
An artist s depiction of a gamma-ray burst s relativistic jet full of very-high-energy photons breaking out of a collapsing star. A team of scientists has gotten their best look yet at a gamma-ray burst, the
most dramatic type of explosion in the universe.
Astronomers think some of these explosions occur when a massive star five or 10 times the mass of our sun detonates, abruptly becoming a black hole. Gamma-ray bursts may also occur when two superdense stellar corpses called neutron stars collide, often forming a black hole. And conveniently, a gamma-ray burst that scientists watched during a few nights in 2019 likely occurred only about 1 billion light-years away from Earth, relatively close by for these dramatic events. ....

Deutsches Elektronen , Edna Ruiz Velasco , Andrew Taylor , High Energy Stereoscopic System , Science Communication Lab , Deutsches Elektronen Synchrotron , German Electron Synchrotron , Max Planck Institute , Nuclear Physics , எட்னா ர்டீஸ் வெலாஸ்கோ , ஆண்ட்ரூ டெய்லர் , அறிவியல் தொடர்பு ஆய்வகம் , ஜெர்மன் எதிர் மின்னணு ஒத்திசைவு , அணு இயற்பியல் ,

Bad Astronomy | Huge stars might be born in accretion disks around supermassive black holes


last place I d guess would be in hellish accretion disks around supermassive black holes.
then they d grow huge.
I can t remember the last time I read a journal paper and muttered “holy crap” under my breath so many times.
Stars usually form in vast clouds of gas and dust. Parts of the cloud collapse under their own gravity, and these knots then condense to form stars. Massive stars burn through their nuclear fuel rapidly and explode as supernovae, but stars like the Sun live much longer. The gas cloud either dissipates or that kind of star leaves it over time, going on to live a stable life for billions of years in the cold vacuum of space. ....

Judy Schmidt , Bill Saxton , Science Communication Lab Artist , Science Communication Lab , Science Communication , Eddington Limit , ஜூடி ஶ்மிட் , ர சி து ஸ்யாக்ஸ்‌டந் , அறிவியல் தொடர்பு ஆய்வகம் கலைஞர் , அறிவியல் தொடர்பு ஆய்வகம் , அறிவியல் தொடர்பு , எடிங்டன் அளவு ,

Connecting smallest and largest scales


Date Time
Connecting smallest and largest scales
Cosmic particle accelerators like blazars (artist’s impression) are typical objects for multi-messenger astronomy (Image credit: DESY, Science Communication Lab)
Established in 2019 with its central hub at CERN, the European Consortium for Astroparticle Theory (EuCAPT) aims to bring together the European community of theoretical astroparticle physicists and cosmologists to tackle some of the greatest mysteries in science.
There are strong hints that explanations for dark matter and dark energy, the origin of high-energy cosmic rays, the matter-antimatter asymmetry, and other enigmas about the universe at large lie in the domain of particle physics. Addressing them therefore demands a highly interdisciplinary approach by a strong and diverse community. ....

United Kingdom , Noord Holland , Gianfranco Bertone , Gian Giudice , Science Communication Lab , European Consortium For Astroparticle Theory Eu , Centre For Gravitation , University Of Amsterdam , Theoretical Physics Department , European Consortium , Astroparticle Theory , Astroparticle Physics , ஒன்றுபட்டது கிஂக்டம் , நூற்த் ஹாலண்ட் , கியான் கியூடிஸ் , அறிவியல் தொடர்பு ஆய்வகம் , பல்கலைக்கழகம் ஆஃப் ஆம்ஸ்டர்டாம் , கோட்பாட்டு இயற்பியல் துறை , ஐரோப்பிய கூட்டமைப்பு ,