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https://www.space.com/odd-radio-circles-cosmic-orcs-mystery-solved
The mystery of vast 'cosmic ORCs' — odd radio circles that encompass entire galaxies — may be solved. Astronomers have pointed to winds from bursts of supernova star explosions as the cause of

https://www.smithsonianmag.com/smart-news/giant-odd-circles-of-radio-waves-in-space-may-finally-have-an-explanation-180983562/
January 22, 2024. An image of an odd radio circle called ORC 1. ORCs can be much wider across than the Milky Way galaxy and are large enough to surround entire galaxies. Jayanne English

https://scitechdaily.com/cosmic-puzzles-the-mystery-behind-universes-rare-radio-circles-unveiled/
Technological developments allowed ASKAP to scan large portions of the sky at very faint limits which made odd radio circles (ORCs) detectable for the first time in 2019. The ORCs were enormous — hundreds of kiloparsecs across, where a kiloparsec is equal to 3,260 light-years (for reference, the Milky Way galaxy is about 30 kiloparsecs across).

https://www.sciencedaily.com/releases/2024/01/240108125729.htm
Mar. 21, 2022 — Astronomy's newest mystery objects, odd radio circles or ORCs, have been pulled into sharp focus by an international team of astronomers using the world's most capable radio

https://arstechnica.com/science/2022/03/we-have-our-best-look-yet-at-mysterious-orcs-odd-radio-circles-in-space/
48. Astronomers have been puzzling over the nature and origin of rare, mysterious radio circles in space ever since the objects were first discovered in 2019. Now, the high-resolution MeerKAT

https://www.nature.com/articles/d41586-022-00861-6
Astronomers have captured a close-up image of a rare and mysterious space object, prompting a renewed push to discover its origin. Odd radio circles (ORCs) are gigantic rings of radio waves. Only

https://www.cnn.com/2022/03/24/world/odd-radio-circles-space-scn/index.html
Odd radio circles, or ORCs, are so massive that they measure about a million light-years across - 16 times bigger than our Milky Way galaxy. Now, astronomers have captured the best image yet of

https://phys.org/news/2022-03-astronomers-reveal-image-mysterious-odd.pdf
Astronomy's newest mystery objects⁠—odd radio circles, or ORCs⁠—have been pulled into sharp focus by an international team of astronomers using the world's most capable radio telescopes.

https://www.nature.com/articles/s41550-022-01663-6
Odd radio circles ring galaxies. Paul Woods. Nature Astronomy 6 , 419 ( 2022) Cite this article. 296 Accesses. 2 Altmetric. Metrics. When the first three odd radio circles (ORCs) were discovered

https://www.sci.news/astronomy/odd-radio-circles-12596.html
Astronomers Solve Mystery of Odd Radio Circles. Odd radio circles (ORCs), a class of extragalactic astronomical sources discovered in 2019, are in fact shells formed by outflowing galactic winds, possibly from massive supernovae, according to new research. ASKAP radio continuum image of ORC 1 (contours) overlaid onto a DES 3-color composite image.

https://scitechdaily.com/mysterious-orcs-in-space-revealed-using-the-worlds-most-powerful-radio-telescopes/
Astronomy's newest mystery objects, odd radio circles or ORCs, have been pulled into sharp focus by an international team of astronomers using the world's most capable radio telescopes. First revealed by the ASKAP radio telescope, owned and operated by Australia's national science agency CSIRO, odd radio circles quickly became objects of

https://www.sciencealert.com/odd-astronomer-baffling-radio-circles-appear-to-be-incredibly-giant-explosions
Weird Circular Objects Observed in Space May Finally Be Explained. Space 21 March 2022. By Ray Norris, The Conversation. Artist's impression of odd radio circles. (Sam Moorfield/CSIRO) In 2019, my colleagues and I discovered spooky glowing rings in the sky using CSIRO's ASKAP radio telescope in Western Australia.

https://edition.cnn.com/2024/01/08/world/odd-radio-circles-starburst-galaxies-scn/index.html
Odd radio circles in space have mystified astronomers since the cosmic objects were first discovered in 2019. Now, scientists think they may understand what forms these mysterious celestial

https://www.science.org/content/article/astronomers-solve-mystery-odd-radio-circle-deep-space
Share: Since 2019, astronomers have puzzled over odd radio circles (ORCs), curious rings that pop up in sky surveys at radio wavelengths. At least one of the rings was likely caused by a burst of stars that formed in a distant galaxy and then exploded, blasting gas out into surrounding space, a team of astronomers told the American Astronomical

https://www.astronomy.com/science/understanding-the-origins-of-orcs-odd-radio-circles/
The complex structure of an odd radio circle, or ORC, comes into focus in this composite of a new MeerKAT radio telescope image (green) overlaid on an optical and infrared image obtained by the

https://skyandtelescope.org/astronomy-news/new-image-reveals-possible-origins-of-odd-radio-circles/
ASKAP was well-suited to the task, as the 36-dish array mapped the sky with unprecedented speed, and Norris found three Odd Radio Circles (ORCs) in the data. "We had hoped we might find new phenomena in EMU but perhaps not so quickly, and it looked like this might be it," Norris says. "But as a scientist I have to try to hose down my

https://www.csiro.au/en/news/All/Articles/2022/March/odd-radio-circles
They continue to puzzle us, but new data from South Africa's MeerKAT telescope are helping us solve the mystery. We can now see each ORC is centred on a galaxy too faint to be detected earlier. The circles are most likely enormous explosions of hot gas, about a million light years across, emanating from the central galaxy.

https://www.discovermagazine.com/the-sciences/the-mystery-of-astronomys-odd-radio-circles
In 2019, astronomers mapping the radio signals from the universe's oldest galaxies saw something strange—a giant, faint circular disc with a bright edge about one arcminute in diameter. An arcminute is the width of a soccer ball seen from almost a kilometer away. Circles are relatively common in astronomy. They are usually produced by

https://skyandtelescope.org/astronomy-news/odd-radio-circles-the-remnants-of-furious-galactic-winds/
New evidence suggests extreme starbursts and furious galactic winds are at the heart of odd radio circles (ORCs). Data from the MeerKAT radio telescope shows an odd radio circle (ORC; green) overlaid on a visible-light and near infrared image from the Dark Energy Survey. This ORC was the first to be discovered.

https://spaceaustralia.com/feature/radio-telescopes-narrowing-odd-radio-circles-mystery
As only five ORCs have been found to date, they still remain rather elusive to the radio astronomy community. We know that they only appear in radio light and that the central galaxies are at large distances (out to redshifts of 0.3 - 0.5, roughly 4.1 - 6.8 billion light-years away).

https://earthsky.org/space/odd-radio-circles-orcs-new-image/
Odd radio circles. The South African Radio Astronomy Observatory (SARAO) released a new image yesterday (March 22, 2022) of what it called the astronomy's newest mystery. It's the image you

https://en.wikipedia.org/wiki/Odd_radio_circle
Image of Odd radio circle ORC J2103-6200 by the MeerKAT telescope superimposed on an optical image from the Dark Energy Survey.(2022). In astronomy, an odd radio circle (ORC) is a very large (over 50 thousand times the diameter of our Milky Way ~ 3 Million Light-years) unexplained astronomical object that, at radio wavelengths, is highly circular and brighter along its edges.