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Mysterious radio burst from space is unusually close - and especially baffling -- Science & Technology -- Sott.net


Extremely magnetic, ultra-dense stars
It s taken nearly 15 years to begin untangling the mystery of fast radio bursts. Initial hypotheses included evaporating black holes, flaring dead stars, colliding dense objects, and yes, even alien technologies (spoiler: it s not aliens). Further clues, from nano-scale structures within the radio bursts to their millisecond duration and intensity, suggested they must be produced by extremely dense, compact objects.
So, scientists turned to objects such as black holes and neutron stars, which are left over when massive stars blow themselves to bits in supernovae. Later, observations suggested that some bursts are born in regions with extreme magnetic fields, further suggesting these mysterious signals could come from magnetars. ....

Bryan Gaensler , Shami Chatterjee , Brian Metzger , Northwestern University Claire Ye , Cornell University , Columbia University , University Of Toronto , Northwestern University Ye , Canada Hydrogen Intensity Mapping Experiment , Flatiron Institute , European Very Long Baseline Interferometry Network , Hubble Heritage Team , Milky Way , Northwestern University , ஷமி சாட்டர்ஜி , பிரையன் மெதஜ்கேர் , கார்னெல் பல்கலைக்கழகம் , கொலம்பியா பல்கலைக்கழகம் , பல்கலைக்கழகம் ஆஃப் டொராண்டோ , பிளாட்டிரான் நிறுவனம் , ஹப்பிள் பாரம்பரியம் அணி , பால் வழி , வடமேற்கு பல்கலைக்கழகம் ,

Mysterious radio burst from space is unusually close—and especially baffling


Mysterious radio burst from space is unusually close and especially baffling
Nadia Drake
© Image by ASA, ESA and the Hubble Heritage Team (STScI/AURA)
Discovered by the German astronomer Johann Elert Bode in 1774, M81 is one of the brightest galaxies in the night sky. It is located 11.6 million light-years from Earth in the constellation Ursa Major and has an apparent magnitude of 6.9. Through a pair of binoculars, the galaxy appears as a faint patch of light in the same field of view as M82. A small telescope will resolve M81’s core. The galaxy is best observed during April. This stunning Hubble image was assembled using observations in visible and infrared light. The galaxy’s spiral arms, which wind all the way down into its nucleus, are made up of young, bluish, hot stars formed in the past few million years. They also host a population of stars formed in an episode of star formation that started about 600 million years ago. Ultraviolet light ....

Bryan Gaensler , Shami Chatterjee , Johann Elert Bode , Brian Metzger , Northwestern University Claire Ye , Cornell University , Columbia University , University Of Toronto , Northwestern University Ye , Hubble Heritage Team Stsc , Canada Hydrogen Intensity Mapping Experiment , Flatiron Institute , European Very Long Baseline Interferometry Network , Ursa Major , Milky Way , Hubble Heritage Team , Northwestern University , ஷமி சாட்டர்ஜி , பிரையன் மெதஜ்கேர் , கார்னெல் பல்கலைக்கழகம் , கொலம்பியா பல்கலைக்கழகம் , பல்கலைக்கழகம் ஆஃப் டொராண்டோ , பிளாட்டிரான் நிறுவனம் , அர்ஸ முக்கிய , பால் வழி , ஹப்பிள் பாரம்பரியம் அணி ,

Mysterious radio burst from space is unusually close—and especially baffling


Mysterious radio burst from space is unusually close and especially baffling
A fast radio burst, one of the most perplexing phenomena seen by astronomers, has been detected among a nearby population of ancient stars.
ByNadia Drake
Email
Bright, fleeting blasts of radio waves coming from the vicinity of a nearby galaxy are deepening one of astronomy’s biggest mysteries. The repeating bursts of energy seem to be coming from an ancient group of stars called a globular cluster, which is among the last places astronomers expected to find them.
Often originating billions of light-years away, the extremely bright, extremely brief bursts of radio waves known as fast radio bursts, or FRBs, have defied explanation since they were first spotted in 2007. Based on observations to date, scientists surmised that the bursts are powered by young, short-lived cosmic objects called magnetars. ....

Bryan Gaensler , Shami Chatterjee , Brian Metzger , Northwestern University Claire Ye , Cornell University , Columbia University , University Of Toronto , Northwestern University Ye , Canada Hydrogen Intensity Mapping Experiment , Flatiron Institute , European Very Long Baseline Interferometry Network , Milky Way , Northwestern University , ஷமி சாட்டர்ஜி , பிரையன் மெதஜ்கேர் , கார்னெல் பல்கலைக்கழகம் , கொலம்பியா பல்கலைக்கழகம் , பல்கலைக்கழகம் ஆஃப் டொராண்டோ , பிளாட்டிரான் நிறுவனம் , பால் வழி , வடமேற்கு பல்கலைக்கழகம் ,

NASA's Voyager 1 also detects a faint monotone hum beyond our solar system


May 13, 2021
NASA’s Voyager 1 also detects a faint monotone hum beyond our solar system
by
Jake Pearson
This artist’s illustration of what Voyager 1 looked like when Interstellar entered space.
NASA / JPL-Caltech
Said NASA’s Voyager 1, the longest spacecraft on Earth Farewell to the Solar System About a decade ago, an interstellar spacecraft passed through an invisible door 11 billion miles from Earth. After that, it travels another 3 billion miles, still sending home data, which allows scientists to search for space between stars. In a paper Published Monday in the journal Nature Astronomy, The researchers examined the information that Voyager 1’s plasma wave system found during its voyage, but especially after it crossed the boundary of the Solar System. ....

James Cordes , Stella Koch Ocker , Shami Chatterjee , Space Network , Cornell University , Earth Farewell , Solar System About , Published Monday , Nature Astronomy , Deep Space Network , Solar System , ஜேம்ஸ் கார்ட்ஸ் , ஷமி சாட்டர்ஜி , இடம் வலைப்பின்னல் , கார்னெல் பல்கலைக்கழகம் , வெளியிடப்பட்டது திங்கட்கிழமை , இயற்கை வானியல் , ஆழமான இடம் வலைப்பின்னல் , சூரிய அமைப்பு ,