Category Astronomy/Space

Japanese supercomputer simulations may explain Webb’s Little Red Dots

Japanese supercomputer explains Webb's Little Red Dots
Visualization of the simulation by ATERUI III showing a rapidly growing black hole surrounded by gas. Red indicates areas of higher temperature. Credit: Sunmyon Chon, Takaaki Takeda, 4D2U Project, NAOJ

Of all the discoveries from the James Webb Space Telescope, the multitude of Little Red Dots it has observed is among the most enigmatic. Now, simulations using the Japanese Supercomputer ATERUI III have explained the nature of the Little Red Dots without requiring any exotic assumptions. The simulations show that the Little Red Dots are black holes growing at a rate that would be impossible today because of conditions in the early universe.

In the study, published in the journal Nature, a research team led by Sunmyon Chon at the Max Planck Institute for Astrophysics used the ATERUI I...

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‘Born-again’ star offers rare chance to watch stellar evolution in real time

'Born-again' star offers rare chance to watch stellar evolution in real time
The rapid brightening of Sakurai’s object (green circle) allows astronomers to study the final phases of the stellar evolution in only a few decades. The left and right panels show the brightening. The middle panel is an image obtained with the radio telescope ALMA, showing the material ejected after the star re-ignited. The material currently extends over a size similar to our entire solar system. Credit: Stefan Kimeswenger, University of Innsbruck; Peter van Hoof, Royal Observatory Belgium.

Astronomers have confirmed that one of the fastest-changing stars ever observed has entered a new stage of its evolution, offering a rare opportunity to watch a star’s life unfold on human timescales.

Using the European Southern Observatory’s Very Large Telescope (VLT) in Chile, researchers inc...

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A famous galaxy’s black hole has been hiding its most violent behavior

Astronomers have found that a nearby galaxy’s black hole is blasting out a far more powerful and hidden gas outflow than previously realized. Studying NGC1068, a well-known galaxy with an actively feeding black hole at its center, researchers combined new infrared observations with existing data to map how the black hole’s energy is reshaping the surrounding gas. The results are reported in a paper published Aug. 6 in Astronomy & Astrophysics.

Shaping how galaxies evolve
As matter falls into supermassive black holes, it releases huge amounts of energy, driving powerful winds or outflows from the galaxy’s center. These outflows can heat the surrounding gas, expel gas and stir up the star-forming material in the galaxy, preventing it from forming new stars...

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Series of reactions reveals how complex carbon chemistry can begin in frigid space

Chemists uncover how unthinkable reactions occur in unimaginable conditions
Credit: The Journal of Physical Chemistry A (2026). DOI: 10.1021/acs.jpca.6c03215

Before there was Earth, there was chemistry. In the unimaginable cold, dark clouds where stars and planets are born, carbon molecules assemble into more complex forms—starting a chemical journey that could eventually deliver some of life’s basic ingredients to young planets. There’s only one problem: These molecules need heat to form. At least that’s what scientists have long believed. But new research from FIU chemist Alexander Mebel reveals such chemistry can actually happen at temperatures nearing absolute zero, which is -460°F (-273°C).

On Earth, these complex carbon molecules are usually associated with extremely hot temperatures, such as those associated with combustion...

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