fidzu : geek

Astronomers using JWST have found three actively feeding supermassive black holes in the distant galaxy J0148-4214, seen as it existed about 1.2 billion years after the Big Bang. Two sit just 620 light-years apart near the galaxy's center and are expected to merge within a few hundred million years. Phys.org reports: Theories of galaxy evolution -- based on observations -- suggest that, early in the history of the universe, galaxies came very close to one another and merged. In the process, black holes at their centers also merged, giving rise to even more massive black holes at the centers of the merged galaxies. The analysis yields black hole masses of approximately 80 million, 0.6 million and 2 million solar masses. The most massive black hole is accreting at a lower rate than the nearby black hole with a mass of 0.6 million solar masses, which is actively feeding and even exceeding the maximum accretion rate predicted by basic theories of black hole growth (the Eddington limit). "The JWST data allowed us not only to identify the three black holes, but also to estimate their masses, accretion rates and the stellar mass of the galaxy," says Dr. Giovanni Mazzolari, second author of the study and researcher at MPE. "We find a total stellar mass of about 1.3 billion solar masses, and the black holes represent a significant fraction of that." The central black hole pair is expected to merge within the next few hundred million years. "These results are extremely exciting," adds Roberto Maiolino, professor at the University of Cambridge and co-author of the study. "They suggest that black hole merging may be an additional, fast route for their rapid growth in the early universe." The third black hole, located off-nucleus, may be the remnant of a previous merger, be displaced from the center by a gravitational recoil kick, or be currently migrating inward. The findings have been published in the journal Astronomy & Astrophysics.

Read more of this story at Slashdot.

14 Aug 2026 11:00am GMT

Czinger used topological design and additive manufacturing to make the brakes.

14 Aug 2026 7:01am GMT

alternative_right shares a report from ScienceDaily: Researchers have found a clever new way to map a part of Earth's upper atmosphere that is notoriously difficult to observe. Using orbital data from roughly 1,200 Starlink satellites, they reconstructed changes in atmospheric density about 500 kilometers above Earth. [...] The resulting density patterns also showed strong consistency with observations from the European Space Agency's SWARM satellites, which measure changes in atmospheric density along their orbital paths. The work expands on an earlier study by the same team. In that research, scientists estimated how thermospheric density changed over time and altitude using general orbital information called Two-Line Element, or TLE, data from Starlink satellites. The new analysis adds another dimension by examining how density varies horizontally across latitude and longitude, revealing more of the thermosphere's geographic structure. The findings could have practical benefits as the number of objects orbiting Earth continues to grow. More accurate information about atmospheric density can improve predictions of satellite motion, helping reduce the chance of collisions between satellites and between satellites and space debris. The technique could also eventually support near-real-time measurements of atmospheric density around satellites. Such monitoring could improve space weather forecasting and contribute to safer, more dependable satellite operations in the future.

Read more of this story at Slashdot.

14 Aug 2026 7:00am GMT

An anonymous reader quotes a report from The Guardian: Miniature human organs and other tissues are to be grown from NHS patients' cells in a drive to improve medicine testing and reduce the number of animals used in drug development. Scientists will use the clumps of tissue to learn how diseases vary between patients, helping them identify which treatments are best for different people based on the particular pathology underlying their condition. The move marks a shift away from the traditional use of animals as models for human disease, towards what researchers believe will be more accurate and reliable tests based directly on human tissues. Researchers have been growing tiny clumps of human organs, known as organoids, for more than a decade. Tests show that pieces smaller than a millimeter can mirror key features of full-scale organs and tissues, including how they falter with disease and respond to drugs. Armed with organoids grown from diseased human tissues, scientists can investigate whether new drug candidates reverse pathological changes in all or a subset of patients, and quickly identify ineffective drugs early in the process. Historically, more than 90% of drugs that clear animal testing go on to fail in human trials, raising questions about the value of the tests. US and European medicines regulators now encourage other approaches if available. "It's going to have a major impact on the numbers of animals used and the way we develop new drugs in the future," said Matthias Zilbauer, a clinical professor of paediatric gastroenterology at the Cambridge Stem Cell Institute. "We're not saying there won't be any animal use in the near or foreseeable future, because there are still certain issues that cannot be tested in these new models, but the reduction is very real." "A lot of human diseases either do not occur in animals or occur in a different way because they're not human," added Zilbauer. "We want tests and models that can tell us which treatments work, and in what patients, and a mouse cannot tell us that."

Read more of this story at Slashdot.

14 Aug 2026 3:30am GMT

Study finds wait times for cancer surgeries hit 10-year high.

13 Aug 2026 10:17pm GMT

Trump memo is first time gov't has authorized private sector to perform cyberattacks.

13 Aug 2026 7:38pm GMT

Another month started almost two weeks ago, so we've got a new monthly report from Redox, the general purpose operating system written in Rust. The month of July - it seems the report was published with a bit of a delay, regardless of what the date on their site says - brought improvements to the installer, with new options commonly found in most installers, such as a choice of installation method, network-based installation, and more. The Google Summer of Code work on the new CPU scheduler has also been merged, including a number of related performance enhancements. There's improvements to the ARM port, Amlogic Meson UART ARM64 support, and uutils grep and sed have been successfully built on Redox, replacing their their GNU counterparts in the os-test test suite. In addition, a whole slew of demos were ported as well, from Ratatui demos to various Iced demos covering things like reading QR codes and processing Markdown. Of course, this is all topped off with the usual long list of lower-level, smaller changes and improvements to the kernel, drivers, Relibc, and more.

12 Aug 2026 11:15pm GMT

The OSNews Fundraiser, to celebrate the fact I posted 20000 stories in 21 years, is still underway. The first major incentive was reached, and I, a long-time Linux user, published my experiences using Windows 11 for a month. It wasn't a success. Keep donating if you want to find out what a Linux user thinks of the current state of macOS! ➡️ Donate through Ko-Fi ➡️ Donate through SEPA transfer* ➡️ Buy merch from our store ➡️ Why a fundraiser? €5000 incentive: Make me use Windows 11 for a month (the results were not great)> €10000: Video tour of my office and my computers/devices collection <€15000: Buy a Mac and use macOS for a month (and review it)€20000: I get an OSNews tattoo *Name: Thom Holwerda - IBAN: SE08 8000 0820 1684 4657 8414 - BIC: SWEDSESS Why support OSNews? I want to make sure I can run OSNews for another two decades and another 20000 posts, and I need your help to do so. Since my wife, who has a tough, underpaid job in elderly care, is largely unable to work due to health reasons caused by that very same job, my income has become a lot more crucial for our kids, my wife, and myself. With OSNews readers being more skeptical of subscription-like things like our Patreon than most people, it's exactly these one-time donations that make up the bulk of your support. Thank you.

12 Aug 2026 6:40pm GMT

Raymond Chen explains what, exactly, the file winstart.bat in Windows 95 is used for. In Windows 95, you could create a winstart.bat file in your Windows directory. During startup, the virtual machine manager initializes and creates the so-called "System virtual machine" (the "System VM"), which is the virtual machine that all Windows programs run in. But before running the user-mode kernel in that virtual machine, the virtual machine manager runs the winstart.bat batch file if it exists. ↫ Raymond Chen Chen needs to use several diagrams to really explain what the batch file is used for, but as a very crude summary, it allows you to load TSRs that only apply to Windows programs, while not affecting any additional DOS command prompts you may load later after Windows is already running. While many think it's a Windows 95 feature, it was already present in Windows 3.x. A unique feature that I doubt many people made active use of.

12 Aug 2026 6:24pm GMT

Over the last few weeks, we have been doing research on the integration of our official distribution packages when installed on a target system. In this context we have been looking at the current uses of alpm-install-scriptlet(5) files and alpm-hooks(5) in around 120 package source repositories (alpm-source-repo(7)) to better understand the underlying functionality and use-cases these two integrations offer and target. In this article we are going to look at how these two systems work, how Arch Linux is currently using them and attempt to provide suggestions for when to use which. Learning about alpm-hooks(5) and alpm-install-scriptlet(5) files …

09 Aug 2026 12:00am GMT

This is just a short note on my blog that I have resigned from Arch Linux a package maintainer, developer and security team. I've spent around 10 years as an AUR maintainer, security team, Package Maintainer and then Developer. I implemented support for debug packages, did the initial POC work that would become the git migration and even somehow managed to pull of an online conference during The Plague with the help of others.

01 Aug 2026 12:00am GMT

Good morning from JetBrains Berlin office!

01 Jun 2026 12:00am GMT