"The internet is full of people claiming to uncover conspiracies in politics and business..." reports the Wall Street Journal.

"Now an unlikely new villain has been added to the list: theoretical physicists," they write, saygin resentment of scientific authority figures "is the major attraction of what might be called 'conspiracy physics'." In recent years, a group of YouTubers and podcasters have attracted millions of viewers by proclaiming that physics is in crisis. The field, they argue, has discovered little of importance in the last 50 years, because it is dominated by groupthink and silences anyone who dares to dissent from mainstream ideas, like string theory... Most fringe theories are too arcane for listeners to understand, but anyone can grasp the idea that academic physics is just one more corrupt and self-serving establishment... In this corner of the internet, the scientist Scott Aaronson has written, "Anyone perceived as the 'mainstream establishment' faces a near-insurmountable burden of proof, while anyone perceived as 'renegade' wins by default if they identify any hole whatsoever in mainstream understanding...

As with other kinds of authorities, there are reasonable criticisms to be made of academic physics. By some metrics, scientific productivity has slowed since the 1970s. String theory has not fulfilled physicists' early dreams that it would become the ultimate explanation of all forces and matter in our universe. The Large Hadron Collider, the world's largest particle accelerator, has delivered fewer breakthroughs than scientists expected when it turned on in 2010. But even reasonable points become hard to recognize when expressed in the ways YouTube incentivizes. Conspiracy physics videos with titles like "They Just Keep Lying" are full of sour sarcasm, outraged facial expressions and spooky music...

Leonard Susskind, director of the Stanford Institute for Theoretical Physics, says physicists need to be both more sober and more forceful when addressing the public. The limits of string theory should be acknowledged, he says, but the idea that progress has slowed isn't right. In the last few decades, he and other physicists have figured out how to make progress on the vast project of integrating general relativity and quantum mechanics, the century-old pillars of physics, into a single explanation of the universe.
The bitter attacks on leading physicists get a succinct summary in the article from Chris Williamson, a "Love Island" contestant turned podcast host. "This is like 'The Kardashians' for physicists — I love it."

The heliosphere "plays a major role in why life is possible on our planet," reports CNN, "and how it perhaps once existed on others such as Mars." (Basically solar winds create "a constant flow of charged particles" that form "an enormous bubble that protects the planets in our solar system from cosmic radiation permeating the Milky Way".)

NASA says the heliosphere's boundary is three times the distance between Earth and Pluto. (After leaving the heliosphere NASA's Voyager probes collected key data about the heliosphere.) But now there's a new mission to investigate "how that solar wind interacts with interstellar space at the boundary of the heliosphere," CNN reports — called the Interstellar Mapping and Acceleration Probe (or IMAP): The spacecraft's 10 instruments will also fill gaps in the existing map of the heliosphere, pieced together from data collected by previous missions, and help further explain how the heliosphere largely shields our solar system from damaging cosmic rays, the most highly energetic particles in the universe. Along with two other space weather missions that lifted off aboard the same rocket on Wednesday, IMAP will help scientists better predict when solar storms unleashed by the sun could affect our planet. When aimed at Earth, harsh radiation from the storms, also known as space weather, can pose risks to astronauts on the International Space Station as well as interfere with communications, the electric power grid, navigation, and radio and satellite operations.

"This next set of missions is the ultimate cosmic carpool," said Dr. Joe Westlake, director of NASA's Heliophysics Division, during a news conference on Sunday. "They will provide unprecedented insight into space weather. Every human on Earth, as well as nearly every system involved in space exploration and human needs, is affected by space weather...." The IBEX, or Interstellar Boundary Explorer, satellite has been mapping the heliosphere since launching in 2008. But IMAP can explore and map the boundaries of the heliosphere like never before because it has instruments with faster imaging that are capable of 30 times higher resolution. Once it reaches an orbit about 1 million miles (1.6 million kilometers) from Earth in about three months, IMAP will also capture observations of the solar wind in real time and measure particles that travel from the sun, study the heliosphere's boundary between 6 billion and 9 billion miles (9.7 billion to 14.5 billion kilometers) away, and even collect data from interstellar space.
Also launching was the SWFO-L1 mission, which CNN says is "intended to act as a solar storm detector, providing early warnings to protect astronauts in low-Earth orbit and satellites that provide critical communications on Earth. It's a tool that will be even more necessary as astronauts venture farther into deep space."

NASA streamed the launch live on YouTube.

xAI struck a deal with the U.S. General Services Administration to sell its chatbot Grok to federal agencies under the executive branch for 42 cents over 18 months, undercutting OpenAI and Anthropic's $1 offerings. TechCrunch reports: The steep discount for federal agencies includes access to xAI engineers to help integrate the technology. The price point is either part of a running joke Musk has of using variations of 420, a marijuana reference, or a nod to one of Musk's favorite books, "The Hitchhiker's Guide to the Galaxy," which references the number 42 as the answer to the meaning of life and the universe.

... In late August, internal emails obtained by Wired revealed the White House had instructed the GSA to add xAI's Grok to the approved vendor list "ASAP." The company was also one of several AI firms, including Anthropic, Google, and OpenAI, to be selected for a $200 million contract with the Pentagon. A GSA spokesperson told TechCrunch that Musk was not directly involved in negotiating the agreement.

An anonymous reader shared this report from the Washington Post: Finnish tech firm Bluefors, a maker of ultracold refrigerator systems critical for quantum computing, has purchased tens of thousands of liters of Helium-3 from the moon — spending "above $300 million" — through a commercial space company called Interlune. The agreement, which has not been previously reported, marks the largest purchase of a natural resource from space.

Interlune, a company founded by former executives from Blue Origin and an Apollo astronaut, has faced skepticism about its mission to become the first entity to mine the moon (which is legal thanks to a 2015 law that grants U.S. space companies the rights to mine on celestial bodies). But advances in its harvesting technology and the materialization of commercial agreements are gradually making this undertaking sound less like science fiction. Bluefors is the third customer to sign up, with an order of up to 10,000 liters of Helium-3 annually for delivery between 2028 and 2037...

Helium-3 is lighter than the Helium-4 gas featured at birthday parties. It's also much rarer on Earth. But moon rock samples from the Apollo days hint at its abundance there. Interlune has placed the market value at $20 million per kilogram (about 7,500 liters). "It's the only resource in the universe that's priced high enough to warrant going out to space today and bringing it back to Earth," said Rob Meyerson [CEO of Interlune and former president of Blue Origin]...

[H]eat, even in small doses, can cause qubits to produce errors. That's where Helium-3 comes in. Bluefors makes the cooling technology that allows the computer to operate — producing chandelier-type structures known as dilution refrigerators. Their fridges, used by quantum computer leader IBM, contain a mixture of Helium-3 and Helium-4 that pushes temperatures below 10 millikelvins (or minus-460 degrees Fahrenheit)... Existing quantum computers have been built with more than a thousand qubits, he said, but a commercial system or data center would need a million or more. That could require perhaps thousands of liters of Helium-3 per quantum computer. "They will need more Helium-3 than is available on planet Earth," said Gary Lai [a co-founder and chief technology officer of Interlune, who was previously the chief architect at Blue Origin]. Most Helium-3 on Earth, he said, comes from the decay of tritium (an isotope of hydrogen) in nuclear weapons stockpiles, but between 22,000 and 30,000 liters are made each year...

"We estimate there's more than a million metric tons of Helium-3 on the moon," Meyerson said. "And it's been accumulating there for 4 billion years." Now, they just need to get it.
Interlune CEO Meyerson tells the post "It's really all about establishing a resilient supply chain for this critical material" — adding that in the long-term he could also see Helium-3 being used for other purposes including fusion energy.

Physicists have confirmed Stephen Hawking's 1971 black hole area theorem with near-absolute certainty, thanks to gravitational waves from an exceptionally loud black hole collision detected by upgraded LIGO instruments. New Scientist reports: Hawking proposed his black hole area theorem in 1971, which states that when two black holes merge, the resulting black hole's event horizon -- the boundary beyond which not even light can escape the clutches of a black hole -- cannot have an area smaller than the sum of the two original black holes. The theorem echoes the second law of thermodynamics, which states that the entropy, or disorder within an object, never decreases.

Black hole mergers warp the fabric of the universe, producing tiny fluctuations in space-time known as gravitational waves, which cross the universe at the speed of light. Five gravitational wave observatories on Earth hunt for waves 10,000 times smaller than the nucleus of an atom. They include the two US-based detectors of the Laser Interferometer Gravitational-Wave Observatory (LIGO) plus the Virgo detector in Italy, KAGRA in Japan and GEO600 in Germany, operated by an international collaboration known as LIGO-Virgo-KAGRA (LVK).

The recent collision, named GW250114, was almost identical to the one that created the first gravitational waves ever observed in 2015. Both involved black holes with masses between 30 and 40 times the mass of our sun and took place about 1.3 billion light years away. This time, the upgraded LIGO detectors had three times the sensitivity they had in 2015, so they were able to capture waves emanating from the collision in unprecedented detail. This allowed researchers to verify Hawking's theorem by calculating that the area of the event horizon was indeed larger after the merger. The findings have been published in the journal Physical Review Letters.

Analyst Ben Thompson, commenting on Apple's outlook following the launch of the iPhone 17 lineup: Apple, to be fair, isn't selling the same sugar water year-after-year in a zero sum war with other sugar water companies. Their sugar water is getting better, and I think this year's seasonal concoction is particularly tasty. What is inescapable, however, is that while the company does still make new products -- I definitely plan on getting new AirPod Pro 3s! -- the company has, in the pursuit of easy profits, constrained the space in which it innovates.

That didn't matter for a long time: smartphones were the center of innovation, and Apple was consequently the center of the tech universe. Now, however, Apple is increasingly on the periphery, and I think that, more than anything, is what bums people out: no, Apple may not be a sugar water purveyor, but they are farther than they have been in years from changing the world.

"I have not pulled this, I'm annoyed by having to even look at this, and if you actually expect me to pull this I want a real explanation and not a useless link," Linus Torvalds posted Friday on the Linux kernel mailing list.

Phoronix explains: It's become a common occurrence seeing "Link: " tags within Git commits for the Linux kernel that point to the latest Linux kernel mailing list patches of the same patch... Linus Torvalds has had enough and will be more strict against accepting pull requests that have link tags of no value. He commented yesterday on a block pull request that he pulled and then backed out of:

"And dammit, this commit has that promising 'Link:' argument that I hoped would explain why this pointless commit exists, but AS ALWAYS that link only wasted my time by pointing to the same damn information that was already there. I was hoping that it would point to some oops report or something that would explain why my initial reaction was wrong.

"Stop this garbage already. Stop adding pointless Link arguments that waste people's time. Add the link if it has *ADDITIONAL* information....

"Yes, I'm grumpy. I feel like my main job — really my only job — is to try to make sense of pull requests, and that's why I absolutely detest these things that are automatically added and only make my job harder."
A longer discussion ensued...

• Torvalds: [A] "perfect" model might be to actually have some kind of automation of "unless there was actual discussion about it". But I feel such a model might be much too complicated, unless somebody *wants* to explore using AI because their job description says "Look for actual useful AI uses". In today's tech world, I assume such job descriptions do exist. Sigh...

• Torvalds: I do think it makes sense for patch series that (a) are more than a small handful of patches and (b) have some real "story" to them (ie a cover letter that actually explains some higher-level issues)...

Torvalds also had two responses to a poster who'd said "IMHO it's better to have a Link and it _potentially_ being useful than not to have it and then need to search around for it."

• Torvalds: No. Really. The issue is "potentially — but very likely not — useful" vs "I HIT THIS TEN+ TIMES EVERY SINGLE F%^& RELEASE".
  
  There is just no comparison. I have literally *never* found the original submission email to be useful, and I'm tired of the "potentially useful" argument that has nothing to back it up with. It's literally magical thinking of "in some alternate universe, pigs can fly, and that link might be useful"

• Torvalds: And just to clarify: the hurt is real. It's not just the disappointment. It's the wasted effort of following a link and having to then realize that there's nothing useful there. Those links *literally* double the effort for me when I try to be careful about patches...
  
  The cost is real. The cost is something I've complained about before... Yes, it's literally free to you to add this cost. No, *YOU* don't see the cost, and you think it is helpful. It's not. It's the opposite of helpful. So I want commit messages to be relevant and explain what is going on, and I want them to NOT WASTE MY TIME.
  
  And I also don't want to ignore links that are actually *useful* and give background information. Is that really too much to ask for?

Torvalds points out he's brought this up four times before — once in 2022.

• Torvalds: I'm a bit frustrated, exactly because this _has_ been going on for years. It's not a new peeve.
  
  And I don't think we have a good central place for that kind of "don't do this". Yes, there's the maintainer summit, but that's a pretty limited set of people. I guess I could mention it in my release notes, but I don't know who actually reads those either.. So I end up just complaining when I see it.

After 26 years and over 1,000 episodes, Melvyn Bragg is stepping down as presenter of BBC Radio 4's In Our Time, leaving behind a legacy of intellectual curiosity and broadcasting excellence. While he will no longer host the series, he will remain involved with the BBC and is set to launch a new project in 2026. The BBC reports: Over the last quarter of a century, Melvyn has skilfully led conversations about everything from the age of the Universe to 'Zenobia', Queen of the Palmyrene Empire. He has welcomed the company of the brightest and best academics in their fields, sharing their passion and knowledge with a fascinated audience right around the globe. While he will be much missed on In Our Time, Melvyn will continue to be a friend of Radio 4 with more to come to celebrate his extraordinary career, and a new series in 2026 (details to be announced soon).

Melvyn Bragg says: "For a program with a wholly misleading title which started from scratch with a six-month contract, it's been quite a ride! I have worked with many extremely talented and helpful people inside the BBC as well as some of the greatest academics around the world. It's been a great privilege and pleasure. I much look forward to continuing to work for the BBC on Radio 4. Thank you for listening." [...] In Our Time will be back on Radio 4 with a new presenter who will be announced in due course.

Paramount and Activision are teaming up to produce a live-action Call of Duty movie, with Paramount promising the same blockbuster treatment it gave Top Gun: Maverick.

David Ellison, Chairman and CEO of Paramount, said in a statement: "As a lifelong fan of Call of Duty this is truly a dream come true. From the first Allied campaigns in the original Call of Duty, through Modern Warfare and Black Ops, I've spent countless hours playing this franchise that I absolutely love. Being entrusted by Activision and players worldwide to bring this extraordinary storytelling universe to the big screen is both an honor and a responsibility that we don't take lightly. We're approaching this film with the same disciplined, uncompromising commitment to excellence that guided our work on Top Gun: Maverick, ensuring it meets the exceptionally high standards this franchise and its fans deserve. I can promise that we are resolute in our mission to deliver a cinematic experience that honors the legacy of this one-in-a-million brand -- thrilling longtime fans of Call of Duty while captivating a whole new generation."

Rob Kostich, President of Activision, also commented: "Throughout its history, Call of Duty has captured our imagination with incredible action and intense stories that have brought millions of people together from around the world, and that focus on making incredible Call of Duty games remains unwavering. With Paramount, we have found a fantastic partner who we will work with to take that visceral, breathtaking action to the big screen in a defining cinematic moment. The film will honor and expand upon what has made this franchise great in the first place, and we cannot wait to get started. Our shared goal is quite simple -- to create an unforgettable blockbuster movie experience that our community loves, and one that also excites and inspires new fans of the franchise."

alternative_right shares a report from ScienceAlert: In February 2023, a detector called KM3NeT, located deep under the Mediterranean Sea, picked up a signal that seemed to indicate a neutrino with a record-shattering energy of 220 petaelectronvolts (PeV). For reference, the previous record was a mere 10 PeV. Now, an exhaustive analysis of all the data on and around the event, designated KM3-230213A, not only supports the conclusions that the signal was caused by a 220-PeV neutrino, but adds to the mystery about where the heck in the Universe it came from."The patterns of light detected for KM3-230213A show a clear match to what is expected from a relativistic particle crossing the detector, most likely a muon, ruling out the possibility of a glitch," the KM3NeT Collaboration told ScienceAlert. "Thanks to the reconstructed energy and direction of this muon, the most likely scenario by far is that the muon originated in the interaction of an astrophysical neutrino in proximity to the detector, making it the most natural explanation."

The scientists believe that it's very, very unlikely that the neutrino originated within the Milky Way galaxy. Work is underway to come closer to tracing its origin point. "KM3-230213A opened a new window on ultra-high-energy neutrino astronomy," the Collaboration said. "Our analysis is the first effort to combine the observations of multiple telescopes over a wide energy range to characterize the ultra-high-energy spectrum. This represents our best chance to gain knowledge on the most extreme objects that populate our Universe."

The research has been published in the journal Physical Review X.

Igor Babuschkin, co-founder of xAI, has left the company to start Babuschkin Ventures, a VC firm focused on AI safety and humanity-advancing startups. TechCrunch reports: Babuschkin led engineering teams at xAI and helped build the startup into one of Silicon Valley's leading AI model developers just a few years after it was founded. "Today was my last day at xAI, the company that I helped start with Elon Musk in 2023," Babuschkin wrote in the post. "I still remember the day I first met Elon, we talked for hours about AI and what the future might hold. We both felt that a new AI company with a different kind of mission was needed."

Babuschkin is leaving xAI to launch his own venture capital firm, Babuschkin Ventures, which he says will support AI safety research and back startups that "advance humanity and unlock the mysteries of our universe." The xAI co-founder says he was inspired to start the firm after a dinner with Max Tegmark, the founder of the Future of Life Institute, in which they discussed how AI systems could be built safely to encourage the flourishing of future generations. In his post, Babuschkin says his parents immigrated to the U.S. from Russia in pursuit of a better life for their children.

Prior to co-founding xAI, Babuschkin was part of a research team at Google DeepMind that pioneered AlphaStar in 2019, a breakthrough AI system that could defeat top-ranked players at the video game StarCraft. Babuschkin also worked as a researcher at OpenAI in the years before it released ChatGPT. In his post, Babuschkin details some of the challenges he and Musk faced in building up xAI. He notes that industry veterans called xAI's goal of building its Memphis, Tennessee supercomputer in just three months "impossible." [...] Nevertheless, Babuschkin says he's already looking back fondly on his time at xAI, and "feels like a proud parent, driving away after sending their kid away to college." "I learned 2 priceless lessons from Elon: #1 be fearless in rolling up your sleeves to personally dig into technical problems, #2 have a maniacal sense of urgency," said Babuschkin.

Two fundamentally different methods for measuring the universe's expansion rate continue to produce incompatible results -- with direct observations of receding galaxies yielding approximately 73 kilometers per second per megaparsec and cosmic microwave background radiation analysis producing closer to 67 km/s/mpc.

The discrepancy, known as the Hubble tension, has strengthened annually for the past decadem, according to Duke University astronomer Dan Scolnic. The persistent disagreement prevents calculation of the universe's precise age or size. The Lambda-CDM model, which holds that dark energy and dark matter comprise 95% of the universe while visible matter constitutes just 5%, assumes dark energy's nature has remained constant since the Big Bang.

Some theorists propose dark energy's potency changes over time, while others suggest the Milky Way sits within a comparatively empty region of space. A June study using gravitational lensing of quasar light, bypassing traditional distance measurements, matched the higher value. New telescopes including the Vera Rubin Observatory and Nancy Grace Roman Space Telescope may provide additional data. Past improvements in measurement precision have only reinforced rather than resolved the tension.

After it began "peering into the distant universe" in 2022, NASA's James Webb Space Telescope "has discovered a rash of 'little red dots'," reports Science magazine. There's "hundreds of them, shining within the first billion years of the 13.8-billion-year-old universe, so small and red that they defied conventional explanation."

"Only in the past few months has a picture begun to emerge. The little red dots, astronomers say, may be an entirely new type of object: a colossal ball of bright, hot gas, larger than the Solar System, powered not by nuclear fusion, but by a black hole..." The objects, which some astronomers are calling "black hole stars," could be a missing link in the evolution of galaxies and help explain the rapid growth of supermassive black holes that lie at their hearts. "The big breakthrough of the past 6 months is actually the realization that we can throw out all these other models we've been playing with before," says astronomer Anna de Graaff of the Max Planck Institute for Astronomy... JWST couldn't resolve the dots into a recognizable shape, which meant they must have been tiny — less than 2% of the diameter of the Milky Way. "It was a mystery ... as to why they were so spatially compact," says Caitlin Casey of the University of Texas at Austin. An impossibly dense packing of stars would be needed to explain their brightness. "I was excited," Casey says...

For Mitch Begelman, a theoretical astrophysicist at the University of Colorado Boulder, the observations are a vindication. Earlier this month, he and a colleague posted a preprint on arXiv reviving a scenario for the formation of hypothetical "quasi-stars" that he and others had proposed 20 years ago. The first generation of stars, they calculated, could have grown to colossal size in the early universe, which was made up almost entirely of hydrogen, the raw material of stars. When a giant star ran out of fuel, they said, its core would have collapsed into a black hole, but the outer envelope of hydrogen was so dense it survived the blast, enclosing the newborn black hole. As the black hole chewed at its shroud of gas, the entire system glowed as a quasi-star larger than the Solar System. "That's what the quasi-star envelope is doing, it's force-feeding the black hole by pushing matter into it," Begelman says.

Given how common little red dots appear to be in the early universe, theorists are beginning to wonder whether this giant-ball-of-gas phase is an essential part of black hole growth and the evolution of galaxies. "We're probably looking at kind of a new phase of black hole growth that we didn't know about before," de Graaff says.
"If the red dots do turn out to be black hole stars, it will be precisely the sort of breakthrough expected from JWST — and the kind of discovery astronomers live for."

Thanks to Slashdot reader sciencehabit for sharing the news.

A new study analyzing distorted sound waves from the early universe suggests we may live in a massive cosmic void "with roughly 20% lower than the average density of matter," writes Indranil Banik in an article for The Conversation. "Not every physicist is convinced that this is the case. But our recent paper analyzing distorted sounds from the early universe, published in the Monthly Notices of the Royal Astronomical Society, strongly backs up the idea." Slashdot reader alternative_right shares an excerpt from the report: My colleagues and I previously argued that the Hubble tension might be due to our location within a large void. That's because the sparse amount of matter in the void would be gravitationally attracted to the more dense matter outside it, continuously flowing out of the void. In previous research, we showed that this flow would make it look like the local universe is expanding about 10% faster than expected. That would solve the Hubble tension. But we wanted more evidence. And we know a local void would slightly distort the relation between the BAO angular scale and the redshift due to the faster moving matter in the void and its gravitational effect on light from outside.

So in our new paper, Vasileios Kalaitzidis and I set out to test the predictions of the void model using BAO measurements collected over the last 20 years. We compared our results to models without a void under the same background expansion history. In the void model, the BAO ruler should look larger on the sky at any given redshift. And this excess should become even larger at low redshift (close distance), in line with the Hubble tension. The observations confirm this prediction. Our results suggest that a universe with a local void is about one hundred million times more likely than a cosmos without one, when using BAO measurements and assuming the universe expanded according to the standard model of cosmology informed by the CMB.

Our research shows that the ACDM model without any local void is in "3.8 sigma tension" with the BAO observations. This means the likelihood of a universe without a void fitting these data is equivalent to a fair coin landing heads 13 times in a row. By contrast, the chance of the BAO data looking the way they do in void models is equivalent to a fair coin landing heads just twice in a row. In short, these models fit the data quite well. In the future, it will be crucial to obtain more accurate BAO measurements at low redshift, where the BAO standard ruler looks larger on the sky -- even more so if we are in a void. The average expansion rate so far follows directly from the age of the universe, which we can estimate from the ages of old stars in the Milky Way. A local void would not affect the age of the universe, but some proposals do affect it. These and other probes will shed more light on the Hubble crisis in cosmology.

Measuring earth's position (or "geodesy") requires using telescopes that track radiation from distant black holes. Their signals "pass cleanly through the atmosphere and we can receive them during day and night and in all weather conditions," writes a senior scientist at the University of Tasmania.

But there's a problem... Radio waves are also used for communication on Earth — including things such as wifi and mobile phones... [A] few narrow lanes are reserved for radio astronomy. However, in previous decades the radio highway had relatively little traffic. Scientists commonly strayed from the radio astronomy lanes to receive the black hole signals. To reach the very high precision needed for modern technology, geodesy today relies on more than just the lanes exclusively reserved for astronomy.

In recent years, human-made electromagnetic pollution has vastly increased. When wifi and mobile phone services emerged, scientists reacted by moving to higher frequencies. However, they are running out of lanes. Six generations of mobile phone services (each occupying a new lane) are crowding the spectrum... Today, the multitude of signals are often too strong for geodetic observatories to see through them to the very weak signals emitted by black holes. This puts many satellite services at risk.

To keep working into the future — to maintain the services on which we all depend — geodesy needs some more lanes on the radio highway. When the spectrum is divided up via international treaties at world radio conferences, geodesists need a seat at the table. Other potential fixes might include radio quiet zones around our essential radio telescopes. Work is also underway with satellite providers to avoid pointing radio emissions directly at radio telescopes. Any solution has to be global. For our geodetic measurements, we link radio telescopes together from all over the world, allowing us to mimic a telescope the size of Earth. The radio spectrum is primarily regulated by each nation individually, making this a huge challenge.

But perhaps the first step is increasing awareness. If we want satellite navigation to work, our supermarkets to be stocked and our online money transfers arriving safely, we need to make sure we have a clear view of those black holes in distant galaxies — and that means clearing up the radio highway.

Scientists using the largest-ever catalog of Type 1a supernovas -- cosmic explosions from white dwarf "vampire stars" -- have uncovered further evidence that dark energy may not be constant. While the findings are still preliminary, they suggest the mysterious force driving the universe's expansion could be weakening, which "would have ramifications for our understanding of how the cosmos will end," reports Space.com. From the report: By comparing Type 1a supernovas at different distances and seeing how their light has been redshifted by the expansion of the universe, the value for the rate of expansion of the universe (the Hubble constant) can be obtained. Then, that can be used to understand the impact of dark energy on the cosmos at different times. This story is fitting because it was the study of 50 Type 1a supernovas that first tipped astronomers off to the existence of dark energy in the first place back in 1998. Since then, astronomers have observed a further 2,000 Type 1a supernovas with different telescopes. This new project corrects any differences between those observations caused by different astronomical instruments, such as how the filters of telescopes drift over time, to curate the largest standardized Type 1a supernova dataset ever. It's named Union3.

Union3 contains 2,087 supernovas from 24 different datasets spanning 7 billion years of cosmic time. It builds upon the 557 supernovas catalogued in an original dataset called Union2. Analysis of Union3 does indeed seem to corroborate the results of DESI -- that dark energy is weakening over time -- but the results aren't yet conclusive. What is impressive about Union3, however, is that it presents two separate routes of investigation that both point toward non-constant dark energy. "I don't think anyone is jumping up and down getting overly excited yet, but that's because we scientists are suppressing any premature elation since we know that this could go away once we get even better data," Saul Perlmutter, study team member and a researcher at Berkeley Lab, said in a statement. "On the other hand, people are certainly sitting up in their chairs now that two separate techniques are showing moderate disagreement with the simple Lambda CDM model."

And when it comes to dark energy in general, Perlmutter says the scientific community will pay attention. After all, he shared the 2011 Nobel Prize in Physics for discovering this strange force. "It's exciting that we're finally starting to reach levels of precision where things become interesting and you can begin to differentiate between the different theories of dark energy," Perlmutter said.

"Scientists at the world's largest particle collider have observed a new class of antimatter particles breaking down at a different rate than their matter counterparts," reports Scientific American: [P]hysicists have been on the hunt for any sign of difference between matter and antimatter, known in the field as a violation of "charge conjugation-parity symmetry," or CP violation, that could explain why some matter escaped destruction in the early universe. [Wednesday] physicists at the Large Hadron Collider (LHC)'s LHCb experiment published a paper in the journal Nature announcing that they've measured CP violation for the first time in baryons — the class of particles that includes the protons and neutrons inside atoms.

Baryons are all built from triplets of even smaller particles called quarks. Previous experiments dating back to 1964 had seen CP violation in meson particles, which unlike baryons are made of a quark-antiquark pair. In the new experiment, scientists observed that baryons made of an up quark, a down quark and one of their more exotic cousins called a beauty quark decay more often than baryons made of the antimatter versions of those same three quarks... The matter-antimatter difference scientists observed in this case is relatively small, and it fits within predictions of the Standard Model of particle physics — the reigning theory of the subatomic realm. This puny amount of CP violation, however, cannot account for the profound asymmetry between matter and antimatter we see throughout space...

"We are trying to find little discrepancies between what we observe and what is predicted by the Standard Model," [says LHCb spokesperson/study co-author Vincenzo Vagnoni of the Italian National Institute of Nuclear Physics]. "If we find a discrepancy, then we can pinpoint what is wrong." The researchers hope to discover more cracks in the Standard Model as the experiment keeps running. Eventually LHCb should collect about 30 times more data than was used for this analysis, which will allow physicists to search for CP violation in particle decays that are even rarer than the one observed here.

So stay tuned for an answer to why anything exists at all.

alternative_right shares a report from ScienceAlert: Around a Sun-like star just 1,300 light-years away, a family of planets has been seen in its earliest moments of conception. Astronomers analyzed the infrared flow of dust and detritus left over from the formation of a baby star called HOPS-315, finding tiny concentrations of hot minerals that will eventually form planetesimals -- the 'seeds' around which new planets will grow. It's a system that can tell us about the very first steps of planet formation, and may even contain clues about how our own Solar System formed. The findings have been published in the journal Nature.

An anonymous reader shared this report from Cosmos magazine about a plan to "pick up those faint signals from billions of years ago." Astronomers are planning to launch a tiny spacecraft to the far side of the Moon to listen out for "ancient whispers" in a quest to uncover the secrets of the early universe. The mission will focus on understanding the 'Cosmic Dawn', a period in the early stages of the universe after the Big Bang but before the first stars and galaxies appeared.

One of the difficulties in studying this period of the universe is that silence is essential. With all the electronics and interference in our atmosphere, Earth becomes too loud, making it unsuitable for this kind of research... The proposed mission will utilise the Moon as a giant shield, blocking out the noise from Earth, in order to observe these signals...

The mission, known as CosmoCube, is a joint study between the UK's University of Portsmouth, University of Cambridge and Rutherford Appleton Laboratory Space... CosmoCube's radio will operate at low frequencies (10-100MHz), which should hopefully be able to detect extremely faint signals. The team hope to reach lunar orbit before the end of the decade, with a roughly 5-year roadmap planned.
The article includes this quote from Professor David Bacon, from the University of Portsmouth and CosmoCube researcher. "It's incredible how far these radio waves have travelled, now arriving with news of the universe's history.

"The next step is to go to the quieter side of the Moon to hear that news."

The U.S. government has canceled a proposed $900 million project to study in unprecedented detail the afterglow of the Big Bang, the cosmic microwave background (CMB) radiation. Science magazine: Known as CMB-S4, the project envisioned new arrays of ultrasensitive microwave telescopes at the South Pole and in Chile's Atacama Desert. Their goal: to detect patterns in the ancient light that would prove the newborn universe expanded in an exponential growth spurt called cosmic inflation.

The project, which could have delivered smoking gun evidence for a key theory in cosmology, was supposed to be a joint venture between the National Science Foundation (NSF) and the Department of Energy (DOE). However, yesterday, the agencies sent an unsigned statement to the leaders of the collaboration saying the project is off. "DOE and NSF have jointly decided that they can no longer support the CMB-S4 Project," it reads.