JWST
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Are JWST's early, overmassive black holes just normal-range outliers?
Are JWST's early, overmassive black holes just normal-range outliers? Sadie Harley Scientific Editor Andrew Zinin Lead Editor Ever since the JWST revealed a population of SMBH in the early universe that were overmassive, scientists have been working hard to explain them. These black holes existed when the universe was only about 2 billion years old, during Cosmic Noon, and according to our models of black hole growth, there simply wasn't enough time for them to grow so massive.
Black hole feeding bursts may explain JWST's Little Red Dots in early universe
June 8, 2026 report Black hole feeding bursts may explain JWST's Little Red Dots in early universe Shreejaya Karantha Author Sadie Harley Scientific Editor Robert Egan Associate Editor A new theoretical study may have cracked one of the most puzzling discoveries of the James Webb Space Telescope (JWST): Little Red Dots, spotted across the early universe. The paper, posted to the arXiv preprint server on May 29, argues that these objects could be black holes caught in rare, violent bursts of...
JWST finds a stellar bar in the early universe that breaks all rules
May 31, 2026 report JWST finds a stellar bar in the early universe that breaks all rules Shreejaya Karantha Author Sadie Harley Scientific Editor Robert Egan Associate Editor Astronomers using the James Webb Space Telescope (JWST) have discovered a stellar bar in GN20, a massive galaxy seen just 1.5 billion years after the Big Bang. The new paper was submitted to the preprint server arXiv on May 14. Cosmic funnels Stellar bars are elongated arrangements of stars that cut across the center of...
JWST 'weighs' dormant black hole 10 billion light-years away
JWST 'weighs' dormant black hole 10 billion light-years away Sadie Harley Scientific Editor Robert Egan Associate Editor The most distant, nearly invisible dormant black hole has been detected and "weighed" by an international team of astronomers that includes researchers from UCL. The study, published in Science, identified a dormant black hole at the heart of a galaxy known as MRG-M0138 located over 10 billion light years away. It is the most distant dormant black hole yet detected, 15...
JWST maps the weather on a hot gas giant 700 light-years away
WASP-94A b is a hot, tidally locked gas giant orbiting close to one of the stars in a binary system roughly 690 light-years away from Earth. In a new Science study, scientists led by Sagnick Mukherjee, an astrophysicist at Johns Hopkins University, used the James Webb Space Telescope to learn what the weather looks like out there. Tidal locking means that you no longer have day- and night-side temperature differences sweeping across the planet. “We wanted to understand the atmospheres of...
A cosmic case of mistaken identity that can only be solved right now
I’m certain scientists before me have thought this about their own era, but nonetheless, I think we are living in a wildly exciting time for galaxy research. Though US and UK research budgets might be doing the opposite, our understanding of the universe is rapidly expanding. In just the few years since its launch on Christmas 2021, the James Webb Space Telescope (what I prefer to call the Just Wonderful Space Telescope, or JWST) has transformed our understanding of what galaxies looked like...
James Webb Space Telescope weighs 'sleeping giant' black hole from 10 billion light-years away — and it's 6 billion times our sun's mass
James Webb Space Telescope weighs 'sleeping giant' black hole from 10 billion light-years away — and it's 6 billion times our sun's mass "We can now undertake a more complete census of how black holes develop over time and infer their role in shaping galaxy evolution." Using the James Webb Space Telescope (JWST), astronomers have "weighed" a sleeping giant — a dormant supermassive black hole located a staggering 10 billion light-years away. That makes this black hole the most distant...
James Webb telescope detects most distant dormant black hole, invisible in all wavelengths and weighing as much as 6 billion suns
James Webb telescope detects most distant dormant black hole, invisible in all wavelengths and weighing as much as 6 billion suns JWST found a black hole hiding in a galaxy more than 10 billion light-years away from Earth, and used a cosmic magnifying glass to determine its mass. The James Webb Space Telescope has spotted the most distant, dormant black hole in the known universe , hiding in a galaxy more than 10 billion light-years from Earth. The newly analyzed black hole, located in a...
Interstellar comet 3I/ATLAS is blasting out a bunch of methane. Here's why that's weird
Interstellar comet 3I/ATLAS is blasting out a bunch of methane. Here's why that's weird After comet 3I/ATLAS reached perihelion, JWST took another look and detected methane on an interstellar object for the first time. Methane has been seen spewing from comet 3I/ATLAS, marking the first time that the gas has been identified on an interstellar object.
"Little red dot" in early Universe is a naked supermassive black hole
The James Webb Space Telescope (JWST) was designed to give us the ability to look at one of the earliest periods in the evolution of the Universe, a time when some of the earliest stars were putting out enough light to ionize the hydrogen that accounted for almost all of the normal matter present at the time. There were lots of ideas about what we might see, but the Universe is full of surprises. One of the first surprises was the existence of what picked up the moniker "little red dots,"...