astronomers

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The disorderly birth of a new nebula surprises astronomers

‘Extreme stripping action’ led to disorderly birth of South Ring Nebula, Webb image reveals Nasa Orsola DeMarco, Macquarie University When the first five images from the James Webb Space Telescope (JWST) were unveiled, one of them stared at me with two eyes. It was an image of the South Ring Nebula, NGC3132, and right in …

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Rare full moon Mars eclipse impresses astronomers with occultation (video)

Rare full moon Mars eclipse impresses astronomers with occultation (video)

On Wednesday, December 7, skywatchers around the world were treated to a celestial spectacle as the full moon eclipsed Mars in the night sky. The rare event, known as a lunar occultation, refers to one celestial body – in this case Mars – appearing to disappear or hiding behind another – in this case the …

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New kilonova causes astronomers to rethink what we know about gamma-ray bursts

New kilonova causes astronomers to rethink what we know about gamma-ray bursts

Enlarge / Artist’s impression of GRB 211211A. The kilonova and gamma burst is on the right. Aaron M. Geller/Northwestern/CIERA A year ago, astronomers discovered a powerful gamma-ray burst (GRB) lasting nearly two minutes, dubbed GRB 211211A. Now, this unusual event upends the long-held assumption that longer GRBs are the distinctive signature of a massive stellar …

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A star was blocking out a galaxy, but now it's moved enough that astronomers can finally examine what's behind it

A star was blocking out a galaxy, but now it’s moved enough that astronomers can finally examine what’s behind it

One of the greatest puzzles in astronomy, and one of the most difficult to solve, concerns the formation and evolution of galaxies. What did the first ones look like? How did they get so massive? A tiny galaxy just 20 million light-years away could be one piece of the puzzle. A critical difference between the …

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Astronomers have just discovered the closest black hole to Earth.  Until now it was invisible

Astronomers have just discovered the closest black hole to Earth. Until now it was invisible

Astronomers have located the closest stellar-mass black hole to Earth ever discovered. Because this black hole doesn’t feed on matter or emit radiation, making it virtually invisible, scientists had to take a different approach to finding it. A star orbiting the black hole exhibited a “wobble,” which helped them locate the black hole-star binary system …

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Astronomers spot a small incoming asteroid and make a big breakthrough

Astronomers spot a small incoming asteroid and make a big breakthrough

humanity is improve a planetary defense – at least against external threats from outer space, as long as they’re just dumb rocks that follow the laws of physics. And a group of extraordinary humans proved it last week when the planetary defense community stepped in to accurately track and predict exactly where a relatively small …

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Astronomers spot the largest galaxy ever, and the scale will break your brain

Astronomers spot the largest galaxy ever, and the scale will break your brain

Earlier this year, astronomers found an absolute monster of a galaxy. Hidden some 3 billion light-years away, Alcyoneus is a giant radio galaxy reaching 5 megaparsecs in space. It’s 16.3 million light-years long, and it is the largest known structure of galactic origin. This discovery sheds light on our poor understanding of these colossi and …

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A black hole tore apart a star and brought together astronomers from around the world

A black hole tore apart a star and brought together astronomers from around the world

It was an event not seen in over a decade: a sudden burst of energy launched from the center of a distant galaxy, bright enough to be visible 8.5 billion light-years away. . With a burst of light equivalent to more than 1,000 trillion suns, the flash was first detected by the Zwicky Transient Facility, …

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Astronomers capture black hole engulfing star in 'hyper-feeding frenzy'

Astronomers capture black hole engulfing star in ‘hyper-feeding frenzy’

Enlarge / Illustration of a spaghetti star as it is sucked into a supermassive black hole during a tidal disturbance event (TDE). ESO/M. Cereal fairs Earlier this year, astronomers picked up an unusually bright signal in the X-ray, optical and radio regimes, dubbed AT 2022cmc. They have now determined that the most likely source of …

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