Remember asteroid 2024 YR4 (which at one point had a 1 in 32 chance of hitting Earth, before ending up at "impact probability zero")? CNN reports that asteroid is now "zooming beyond the reach of telescopes on its orbit around the sun."

"But as scientists wait for it to reappear, its revised trajectory is now drawing attention to another possible target: the moon." The latest observations of the asteroid in early June, before YR4 disappeared from view, have improved astronomers' knowledge of where it will be in seven years by almost 20%, according to NASA. That data shows that even with Earth avoiding direct impact, YR4 could still pose a threat in late 2032 by slamming into the moon. ["The asteroid's probability of impacting the Moon has slightly increased from 3.8% to 4.3%," writes NASA, and "it would not alter the Moon's orbit."]
CNN calls the probabiliy "small but decent enough odds for scientists to consider how such a scenario might play out." The collision could create a bright flash that would be visible with the naked eye for several seconds, according to Wiegert, lead author of a recent paper submitted to the American Astronomical Society journals analyzing the potential lunar impact. The collision could create an impact crater on the moon estimated at 1 kilometer wide (0.6 miles wide), Wiegert said... It would be the largest impact on the moon in 5,000 years and could release up to 100 million kilograms (220 million pounds) of lunar rocks and dust, according to the modeling in Wiegert's study... Particles the size of large sand grains, ranging from 0.1 to 10 millimeters in size, of lunar material could reach Earth between a few days and a few months after the asteroid strike because they'll be traveling incredibly fast, creating an intense, eye-catching meteor shower, Wiegert said.

"There's absolutely no danger to anyone on the surface," Wiegert said. "We're not expecting large boulders or anything larger than maybe a sugar cube, and our atmosphere will protect us very nicely from that. But they're traveling faster than a speeding bullet, so if they were to hit a satellite, that could cause some damage...." Hundreds to thousands of impacts from millimeter-size debris could affect Earth's satellite fleet, meaning satellites could experience up to 10 years' equivalent of meteor debris exposure in a few days, Wiegert said... While a temporary loss of communication and navigation from satellites would create widespread difficulties on Earth, Wiegert said he believes the potential impact is something for satellite operators, rather than the public, to worry about.
"Any missions in low-Earth orbit could also be in the pathway of the debris, though the International Space Station is scheduled to be deorbited before any potential impact," reports CNN.

And they add that Wiegert also believes even small pieces of debris (tens of centimeters in size) "could present a hazard for any astronauts who may be present on the moon, or any structures they have built for research and habitation... The moon has no atmosphere, so the debris from the event could be widespread on the lunar surface, he added."

One in every 9 Americans lives in California. And right now its Congress is debating a bill that "would help establish a regional electricity market capable of tying together the American West's three dozen independent power grids," according to the Los Angeles Times' newsletter about climate change and energy issues.

But that bill "has bitterly divided environmentalists," with some seeing it "as a plot by greedy energy companies to enrich themselves." Supporters say it would smooth the flow of solar and wind power from the sunny, windy landscapes where they're produced most cheaply to the cities where they're most needed. It would help California keep the lights on without fossil fuels, and without driving up utility bills... [S]olar and wind power are still cheaper than planet-warming coal and fossil gas. Which is why Michael Wara, a Stanford energy and climate scholar, isn't worried that SB 540 will leave Californians drowning in dirty power. In a regional market, solar and wind will usually outcompete coal and gas. "Any energy source that requires fuel to operate is more expensive than an energy source that doesn't," he said.

California also needs to prove that a grid powered entirely by clean energy is affordable and reliable. The state's rising electric rates are already a big concern. And although the grid has been stable the last few years, thanks to batteries that store solar for after dark, keeping the lights on with more and more renewables might get harder. Regional market advocates make a strong case that interstate cooperation would help.

For instance, a market would help California more smoothly access Pacific Northwest hydropower, already a key energy source during heat waves. It would also give California easier access to low-cost winds from New Mexico and Wyoming. Best of all, that wind is often blowing strong just as the sun sets along the Pacific. Another benefit: Right now, California often generates more solar than it can use during certain hours of the day, forcing solar farms to shut down — or pay other states to take the extra power. With a regional market, California could sell excess solar to other states, keeping utility bills down. "This is about lowering costs," said Robin Everett, deputy director of the Sierra Club's Beyond Coal Campaign.
"Unlike with past regional market proposals, California would retain control of its grid operator, with only a few functions delegated to a regional entity," the article points out. But opponents still worry this would give new powers to an outside-of-California group to thwart clean energy progress (if not gouge customers). Amendments passed this week add a "Regional Energy Markets Oversight Council" to address that concern — but which lost support for the bill from some of its earlier supporters.

"The amendments would make it easier for the Golden State to bail," notes the climate newsletter, and "Out-of-state utilities don't want to waste time and money committing themselves to a California-led market only to lose California, and thus many of the economic benefits..."

"The distant reaches of the Solar System are still mysterious," writes ScienceAlert. "Not much sunlight pierces these regions, and there are strong hints that undiscovered objects lurk there. The objects that astronomers have discovered in these dim reaches are primordial, and their orbits suggest the presence of more undiscovered objects."

And now thanks to the giant 8.2-meter Subaru telescope at Hawaii's Mauna Kea Observatory, astronomers have discovered "a massive new solar system body located beyond the orbit of Pluto," reports Space.com. The weird elongated orbit of the object suggests that if "Planet Nine" exists, it is much further from the sun than thought, or it has been ejected from our planetary system altogether.

The strange orbit of the object, designated 2023 KQ14 and nicknamed "Ammonite," classifies it as a "sednoid." Sednoids are bodies beyond the orbit of the ice giant Neptune, known as trans-Neptunian objects (TNOs), characterized by a highly eccentric (non-circular) orbit and a distant closest approach to the sun or "perihelion." The closest distance that 2023 KQ14 ever comes to our star is equivalent to 71 times the distance between Earth and the sun... This is just the fourth known sednoid, and its orbit is currently different from that of its siblings, though it seems to have been stable for 4.5 billion years.

However, the team behind the discovery, made using Subaru Telescope as part of the Formation of the Outer Solar System: An Icy Legacy (FOSSIL) survey, thinks that all four sednoids were on similar orbits around 4.2 billion years ago. That implies something dramatic happened out at the edge of the solar system around 400 million years after its birth. Not only does the fact that 2023 KQ14 now follows a unique orbit suggest that the outer solar system is more complex and varied than previously thought, but it also places limits on a hypothetical "Planet Nine" theorized to lurk at the edge of the solar system.
There's "no viable transfer mechanisms" to explain the observed orbits "with the current configuration of planets," according to the team's recently-published paper. But since those orbits are stable, it "suggests that an external gravitational influence beyond those of the currently known Solar System planets is required to form their orbits." So where does that leave us? ScienceAlert summarizes the rest of the paper — and where things stand now: Astronomers have proposed many sources for this external gravitational influence, including interactions with a rogue planet or star, ancient stellar interactions from when the Sun was still in its natal cluster, and the capture of objects from other lower-mass stars in the Solar System's early times. But the explanation that gets the most attention is interactions with a hypothetical planet, Planet Nine.

If Planet Nine exists, it has a huge area to hide in. Some astronomers who have studied its potential existence think it could be the fifth largest planet in the Solar System. It would be so far away that it would be extremely dim. However, we may be on the cusp of detecting it, if it exists. The Vera Rubin Observatory recently saw first light and will begin its decade-long Legacy Survey of Space and Time (LSST). The LSST will find transient events and objects in the Solar System like no other telescope before it. It's purpose-built to find hard-to-detect objects, and not even an elusive object like Planet Nine may be able to hide from it.

Twitter co-founder/Block CEO Jack Dorsey isn't just vibe coding new apps like Bitchat and Sun Day. He's also "invested $10 million in an effort to fund experimental open source projects and other tools that could ultimately transform the social media landscape," reports TechCrunch," funding the projects through an online collective formed in May called "andOtherStuff: [T]he team at "andOtherStuff" is determined not to build a company but is instead operating like a "community of hackers," explains Evan Henshaw-Plath [who handles UX/onboarding and was also Twitter's first employee]. Together, they're working to create technologies that could include new consumer social apps as well as various experiments, like developer tools or libraries, that would allow others to build apps for themselves.

For instance, the team is behind an app called Shakespeare, which is like the app-building platform Lovable, but specifically for building Nostr-based social apps with AI assistance. The group is also behind heynow, a voice note app built on Nostr; Cashu wallet; private messenger White Noise; and the Nostr-based social community +chorus, in addition to the apps Dorsey has already released. Developments in AI-based coding have made this type of experimentation possible, Henshaw-Plath points out, in the same way that technologies like Ruby on Rails, Django, and JSON helped to fuel an earlier version of the web, dubbed Web 2.0.

Related to these efforts, Henshaw-Plath sat down with Dorsey for the debut episode of his new podcast, revolution.social with @rabble... Dorsey believes Bluesky faces the same challenges as traditional social media because of its structure — it's funded by VCs, like other startups. Already, it has had to bow to government requests and faced moderation challenges, he points out. "I think [Bluesky CEO] Jay [Graber] is great. I think the team is great," Dorsey told Henshaw-Plath, "but the structure is what I disagree with ... I want to push the energy in a different direction, which is more like Bitcoin, which is completely open and not owned by anyone from a protocol layer...."

Dorsey's initial investment has gotten the new nonprofit up and running, and he worked on some of its initial iOS apps. Meanwhile, others are contributing their time to build Android versions, developer tools, and different social media experiments. More is still in the works, says Henshaw-Plath.

"There are things that we're not ready to talk about yet that'll be very exciting," he teases.

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.

The LIGO-Virgo-KAGRA Collaboration has detected the most massive black hole merger to date, forming a final black hole around 225 times the Sun's mass. Caltech reports: Before now, the most massive black hole merger -- produced by an event that took place in 2021 called GW190521 -- had a total mass of 140 times that of the Sun. In the more recent GW231123 event, the 225-solar-mass black hole was created by the coalescence of black holes each approximately 100 and 140 times the mass of the Sun. In addition to their high masses, the black holes are also rapidly spinning.

"The black holes appear to be spinning very rapidly -- near the limit allowed by Einstein's theory of general relativity," explains Charlie Hoy of the University of Portsmouth and a member of the LVK. "That makes the signal difficult to model and interpret. It's an excellent case study for pushing forward the development of our theoretical tools." Researchers are continuing to refine their analysis and improve the models used to interpret such extreme events. "It will take years for the community to fully unravel this intricate signal pattern and all its implications," says Gregorio Carullo of the University of Birmingham and a member of the LVK. "Despite the most likely explanation remaining a black hole merger, more complex scenarios could be the key to deciphering its unexpected features. Exciting times ahead!"

SUSE has unveiled a new support package aimed at customers concerned about data sovereignty. From a report: Called "SUSE Sovereign Premium Support," the service geo-pins support to a given region rather than adopting the traditional follow-the-sun model, where support comes from whatever region is online. The latter approach could break sovereignty regulations or policies, as it might involve transferring data out of a region. Ensuring that support is available from a specific region is therefore crucial, particularly for European customers.

SUSE CEO Dirk-Peter van Leeuwen told The Register: "Digital sovereignty has become a really hot topic in the last half year, and specifically in Europe, where companies feel an increasing need to get things done in-house, in-country, or in-region within Europe, with less dependency on non-European vendors and supply chains and people."

Three space probes are leaving our solar system — yet are still functioning. After the two Voyager space probes, New Horizons "was launched in 2006, initially to study Pluto," remembers New Scientist. But "it has since travelled way beyond this point, ploughing on through the Kuiper belt, a vast, wide band of rocks and dust billions of miles from the sun. It is now speeding at tens of thousands of kilometres per hour..."

And it's just performed the first ever example of interstellar navigation... As it hurtles out of our solar system, NASA's New Horizons spacecraft is so far from Earth that the stars in the Milky Way appear in markedly different positions compared with our own view... due to the parallax effect. This was demonstrated in 2020 when the probe beamed back pictures of two nearby stars, Proxima Centauri and Wolf 359, to Earth.

Now, Tod Lauer at the US National Optical-Infrared Astronomy Research Laboratory in Arizona and his colleagues have used this effect to work out the position of New Horizons... Almost all spacecraft calculate their bearings to within tens of metres using NASA's Deep Space Network, a collection of radio transmitters on Earth that send regular signals out to space. In comparison, the parallax method was far less accurate, locating New Horizons within a sphere with a radius of 60 million kilometres, about half the distance between Earth and the sun. "We're not going to put the Deep Space Network out of business — this is only a demo proof of concept," says Lauer. However, with a better camera and equipment they could improve the accuracy by up to 100 times, he says.

Using this technique for interstellar navigation could offer advantages over the DSN because it could give more accurate location readings as a spacecraft gets further away from Earth, as well as being able to operate autonomously without needing to wait for a radio signal to come from our solar system, says Massimiliano Vasile at the University of Strathclyde, UK. "If you travel to an actual star, we are talking about light years," says Vasile. "What happens is that your signal from the Deep Space Network has to travel all the way there and then all the way back, and it's travelling at the speed of light, so it takes years."
Just like a ship's captain sailing by the stars, "We have a good enough three-dimensional map of the galaxy around us that you can find out where you are," Lauer says.

So even when limiting your navigation to what's on-board the spacecraft, "It's a remarkable accuracy, with your own camera!"

New evidence from a 300-year-old supernova remnant in the Large Magellanic Cloud suggests that some Type Ia supernovae may result from a "double detonation" -- where a helium shell ignites first, triggering a second core explosion in a white dwarf before it reaches critical mass. "While the physics of the process itself are interesting, the key question this raises is whether type Ia supernovae really are all equally bright," writes Ars Technica's John Timmer. "If they can detonate with substantially less mass than is needed for direct ignition of the core, then it's possible that some of them could be considerably less bright." However, the research team notes that additional factors -- such as the influence of binary systems or secondary detonations -- could further complicate the picture. Ars Technica reports: "The detonations in the carbon-oxygen core and the helium-rich shell result in qualitatively different yield products," the researchers behind the new work write in a paper describing it. In the paper, they focus on calcium, which there are two ways of producing. One is from the outer shell of helium, via fusion before the detonation dilutes the material. A second batch of calcium is produced through the fusion of the core material as it's ejected in the supernova, which prevents further fusion events from converting it to even heavier elements. (Material deeper in the core does end up getting fused into heavier material.) Because it's produced by both of the detonations, models predict that the expanding sphere of debris will contain two different shells of calcium, with some space in between them. To find evidence for these shells, the researchers checked an older supernova remnant, which allows enough time for the movement of material to separate the shells by enough distance that they can be resolved from Earth.

They focused their observations on a supernova remnant named SNR 0509-67.5, located in the nearby Large Magellanic Cloud. SNR 0509-67.5 is estimated to be a bit over 300 years old, meaning material has had enough time to move a significant distance away from the site of the explosion. Imaging using a spectrograph on the Very Large Telescope allowed them to resolve what, in effect, was a spherical sulfur sandwich, with the role of the bread played by calcium. In other words, if you were to travel away from the site of the explosion, you would first hit a layer of ionized calcium, followed by ionized sulfur, and then run into a second layer of ionized calcium. This is exactly what computer models that simulate double detonations predict. So, the researchers suggest it is strong support for that hypothesis. The researchers say that the details suggest that SNR 0509-67.5 was a white dwarf with roughly the same mass as the Sun when it exploded, and that its explosion was likely triggered by the detonation of a helium shell with only three percent of the Sun's mass.

Astronomers have detected a mysterious "interstellar object," dubbed A11pl3Z, speeding through the solar system at 152,000 mph. If confirmed, it would be just the third known interstellar visitor, following 'Oumuamua and Comet Borisov. The visiting space object will pass near Mars and the Sun later this year before leaving the solar system forever. Live Science reports: The newly discovered object, currently dubbed A11pl3Z, was first spotted in data collected between June 25 and June 29 by the Asteroid Terrestrial-impact Last Alert System (ATLAS), which automatically scans the night sky using telescopes in Hawaii and South Africa. The mystery object was confirmed by both NASA's Center for Near Earth Object Studies and the International Astronomical Union's Minor Planet Center on Tuesday (July 1), according to EarthSky.org.

A11pl3Z is most likely a large asteroid, or maybe a comet, potentially spanning up to 12 miles (20 kilometers). It is traveling toward the inner solar system at around 152,000 mph (245,000 km/h) and is approaching us from the part of the night sky where the bar of the Milky Way is located. Based on A11pl3Z's speed and trajectory, experts think it originated from beyond the sun's gravitational influence and has enough momentum to shoot straight through our cosmic neighborhood without slowing down. However, more observations are needed to tell for sure.

Google has signed a deal to purchase 200 megawatts of future fusion energy from Commonwealth Fusion Systems, despite the energy source not yet existing. "It's a sign of how hungry big tech companies are for a virtually unlimited source of clean power that is still years away," reports CNN. From the report: Google and Massachusetts-based Commonwealth Fusion Systems announced a deal Monday in which the tech company bought 200 megawatts of power from Commonwealth's first commercial fusion plant, the same amount of energy that could power roughly 200,000 average American homes. Commonwealth aims to build the plant in Virginia by the early 2030s. When it starts generating usable fusion energy is still TBD, though the company believes they can do it in the same timeframe.

Google is also investing a second round of money into Commonwealth to spur development of its demonstration tokamak -- a donut-shaped machine that uses massive magnets and molten plasma to force two atoms to merge, thereby creating the energy of the sun. Google and Commonwealth did not disclose how much money is being invested, but both touted the announcement as a major step toward fusion commercialization. "We're using this purchasing power that we have to send a demand signal to the market for fusion energy and hopefully move (the) technology forward," said Michael Terrell, senior director of energy and climate at Google.

Commonwealth is currently building its demonstration plant in Massachusetts, known as SPARC. It's the tokamak the company says could forever change where the world gets its power from, generating 10 million times more energy than coal or natural gas while producing no planet-warming pollution. Fuel for fusion is abundant, derived from a form of hydrogen found in seawater and tritium extracted from lithium. And unlike nuclear fission, there is no radioactive waste involved. The big challenge is that no one has yet built a machine powerful and precise enough to get more energy out of the reaction than they put into it.

"Earth's ozone layer blocks the Sun's shortest wave radiation, called UV-C, which is so damaging to cells in high doses that it's a go-to sterilizer in hospitals," writes Slashdot reader sciencehabit. "UV-C is such a killer, in fact, that scientists have questioned whether life can survive on worlds that lack an ozone layer, such as Mars or distant exoplanets.

"But research published this month in Astrobiology suggests one hardy lichen, a hybrid organism made of algae and fungi, may have cracked the UV-C code with a built-in sunscreen, despite never experiencing these rays in its long evolutionary history."

Science magazine explains: When scientists brought a sample of the species, the common desert dweller Clavascidium lacinulatum, back to the lab, graduate student Tejinder Singh put the lichen through the wringer. First, Singh dehydrated the lichen, to make sure it couldn't grow back in real time and mask any UV damage. Then he placed the lichen a few centimeters under a UV lamp and blasted it with radiation. The lichen seemed just fine.

So Singh purchased the most powerful UV-C lamp he could find online, capable of sending out 20 times more radiation than the amount expected on Mars. When he tested the lamp on the most radiation-resistant life form on Earth, the bacterium Deinococcus radiodurans, it died in less than a minute. After 3 months—likely the highest amount of UV-C radiation ever tested on an organism—Singh pulled the sample so he could finish his master's thesis in time. About half of the lichen's algal cells had survived. Then, when the team ground up and cultured part of the surviving lichen, about half of its algal cells sprouted new, green colonies after 2 weeks, showing it maintained the ability to reproduce.

The species may provide a blueprint for surviving on Mars or exoplanets, which don't have an ozone layer to protect them.

The Free Software Foundation is a non-profit — and they're having some fun with it.

They've just announced a summer fundraiser, "and that means the GNU Press Shop is open!" From now until July 28, you can buy your FSF gear at the GNU Press shop. First and foremost, there's the launch of the FSF's fortieth anniversary shirt in a summery yellow. We're taking orders for a limited time for these (until July 28), and then printing them — you should have yours on your shoulders a few weeks after the shop closes.

We've also restocked some favorites in the shop:

- A fresh batch of the popular Ada & Zangemann: A Tale of Software, Skateboards, and Raspberry Ice Cream book by Matthias Kirschner from the Free Software Foundation Europe (FSFE). This tale of software, skateboards, and raspberry ice cream teaches kids how neat and exciting it is having control over your software, a perfect fun summer read!

- Reading is hard in the glaring sun, so shade your eyes with a freshly restocked GNU baseball cap in pitch black with brilliant gold embroidery. These are great for wearing anywhere, especially to free software events.

- For privacy, protect yourself from surveillance with ease and panache with this slick webcam guard.

We also hope you'll consider becoming an FSF associate member, putting yourself at the heart of our commitment to ensuring a world where all software respects our freedom and dignity. Plus, you'll help us reach our summer fundraising goal of 200 new associate members before July 11, and of course you'll also receive a 20% discount at the GNU Press Shop. A note about shipping: the GNU Press shop opens periodically, and we collect all orders during this time and schedule orders to be sent out on specific shipping dates with the help of volunteers. We will be doing the shipping at the end of the FSF's fundraiser, which means there will be a delay between placing your order and receiving it...

If you happen to be in the Boston area in July, and would like to support the FSF's work, we are looking for volunteers to help pack and ship our orders.
Also on sale are the book "Free as in Freedom 2.0" (Richard Stallman's 2010 revision of the 2002 biography by Sam Williams with extensive additional commentary) and "Free Software Free Society: Selected Essays of Richard M. Stallman" (the 3rd edition published in 2015).

And there's also several other books, t-shirts, other FSF-branded gear, and even a sticker that warns people "There is no cloud... just other people's computers."

In its first 10 hours the Rubin space telescope found 2,104 never-before-seen asteroids in our solar system. And Gizmodo reports the data went directly to the International Astronomical Union's Minor Planet Center (MPC), which "plays an essential role in the early detection and monitoring of asteroids that threaten Earth." The MPC has spent years preparing for the deluge of data from Rubin, ramping up its software to process massive amounts of observations. When the first round officially came flooding in on Monday, it was "nerve-racking and exciting simultaneously," Matthew Payne, MPC director, told Gizmodo.
But Space.com explains how extraordinary that is. "There are approximately a million known asteroids in our cosmic neighborhood; over the next few years, Rubin could very well hike that figure up to five million." "This is five times more than all the astronomers in the world discovered during the last 200 years since the discovery of the first asteroid," Željko IveziÄ, Deputy Director of Rubin's Legacy Survey of Space and Time, said during the conference. "We can outdo two centuries of effort in just a couple of years...." The plan is for Rubin to capture such massive, high-resolution images of the southern sky once every three nights for at least the next 10 years. You can therefore consider it to be a super-fast, super-efficient and super-thorough cosmic imager. Indeed, those qualities are perfect for spotting some of the smallest details trailing through the space around our planet: asteroids. "We make movies of the night sky to see two things: objects that move and objects that change brightness," IveziÄ said. "Objects that move come in two flavors. Stars in our galaxy move, and they move slowly. Much faster objects are asteroids...."

[I]t's tremendously difficult to record an asteroid at all. "Asteroids, they disappear after you get one picture of them," IveziÄ said, calling Rubin's ability to image small objects orbiting the sun "unprecedented."
Space.com notes that the ten million galaxies in its first image are just 0.05% of around 20 billion galaxies that Rubin will have imaged by the end of its 10-year "Legacy Survey of Space and Time" investigating dark energy.

In fact, in its first year of regular operations, the Observation "will collect more data than all previous optical observatories combined," reports Earth.com. That torrent of information — petabytes of images and catalogs — will be processed in near-real time. Alerts will be issued to the worldwide astronomy community within 60 seconds of any detected change in the sky. By democratizing access to its enormous dataset, Rubin Observatory will empower both professionals and citizen scientists. This will foster discoveries that range from mapping the structure of the Milky Way to refining the rate at which the universe is expanding.
Reuters explains just how much data is being generated: The number of alerts the telescope will send every night is equivalent to the inboxes of 83,000 people. It's impossible for someone to look at that one by one," said astrophysicist Francisco Foster. "We're going to have to use artificial intelligence tools."
And New Atlas shares some of the "first look" videos released by the Observatory, including one titled The Cosmic Treasure Chest and another on the Trifid and Lagoon Nebulae (which Space.com describe as clouds of gas and dust condensing to birth new stars).

The James Webb Space Telescope has discovered its first new exoplanet, TWA 7b -- a young, low-mass planet about 100 times the mass of Earth, making it the lightest planet ever directly imaged beyond the solar system. Space.com reports: TWA 7b was discovered in the debris rings that surround the low-mass star CE Antilae, also known as TWA 7, located around 111 light-years from Earth. CE Antilae is a very young star, estimated to be around just a few million years old. If that seems ancient, consider the sun, a "middle-aged" star, is around 4.6 billion years old.

[...] The disk of CE Antilae is divided into three distinct rings, one of which is narrow and bounded by two empty "lanes" mostly devoid of matter. When imaging this ring, the JWST spotted an infrared-emitting source, which the team of astronomers determined is most likely a young exoplanet. They then used simulations that confirmed the formation of a thin ring and a "hole" exactly where this planet is positioned, corresponding to JWST observations. The research has been published in the journal Nature.

It's not dark matter, writes Space.com. But astronomers have discovered "a vast tendril of hot gas linking four galaxy clusters and stretching out for 23 million light-years, 230 times the length of our galaxy.

"With 10 times the mass of the Milky Way, this filamentary structure accounts for much of the universe's 'missing matter,' the search for which has baffled scientists for decades...." [I]t is "ordinary matter" made up of atoms, composed of electrons, protons, and neutrons (collectively called baryons) which make up stars, planets, moons, and our bodies. For decades, our best models of the universe have suggested that a third of the baryonic matter that should be out there in the cosmos is missing.

This discovery of that missing matter suggests our best models of the universe were right all along. It could also reveal more about the "Cosmic Web," the vast structure along which entire galaxies grew and gathered during the earlier epochs of our 13.8 billion-year-old universe.... The newly observed filament isn't just extraordinary in terms of its mass and size; it also has a temperature of a staggering 18 million degrees Fahrenheit (10 million degrees Celsius). That's around 1,800 times hotter than the surface of the sun...

The team's research was published on Thursday (June 19) in the journal Astronomy & Astrophysics.
Models of the cosmos (including the standard model of cosmology) "have long posited the idea that the missing baryonic matter of the universe is locked up in vast filaments of gas stretching between the densest pockets of space..." the article points out. But now thanks to Suzaku, a Japan Aerospace Exploration Agency (JAXA) satellite, and the European Space Agency's XMM-Newton, "a team of astronomers has for the first time been able to determine the properties of one of these filaments, which links four galactic clusters in the local universe."

Team leader Konstantinos Migkas (of the Netherlands' Leiden Observatory) explained the significance of their finding. "For the first time, our results closely match what we see in our leading model of the cosmos — something that's not happened before."

"It seems that the simulations were right all along."

An anonymous reader shares a report: Japan is the latest nation hoping to tempt disgruntled US researchers alarmed by the Trump administration's hostile attitude to academia to relocate to the Land of the Rising Sun. The Japanese government aims to create an elite research environment, and has detailed a $693 million package to attract researchers from abroad, including those from America who may have seen their budgets slashed or who fear a clampdown on their academic freedom.

The European Space Agency's Solar Orbiter has captured the first-ever images of the sun's poles by tilting its orbit out of the ecliptic plane. Space.com reports: The captured images of the solar south pole were taken between March 16 and 17, 2025, with the Solar Orbiter's Polarimetric and Helioseismic Imager (PHI), Extreme Ultraviolet Imager (EUI), and Spectral Imaging of the Coronal Environment (SPICE) instruments. They constitute humanity's first ever look at the sun's poles. This was the Solar Orbiter mission's first high-angle observation campaign of the sun, conducted at an angle of 15 degrees below the solar equator. Just a few days after snapping these images, the ESA spacecraft reached a maximum viewing angle of 17 degrees, which it sits in currently as it performs its first "pole-to-pole" orbit of our star. [...]

One of the first discoveries made by the Solar Orbiter is the fact that the magnetic fields around the sun's southern poles appear to be, for lack of a better phrase, a complete mess. While standard magnetic fields have well-defined north and south poles, these new observations reveal that north and south polarities are both found at the sun's southern pole. This seems to happen at solar maximum when the poles of the sun are about to flip. Following this exchange of poles, the fields at the north and south poles will maintain an orderly single polarity during solar minimum until solar maximum during the next 11-year cycle.

The Solar Orbiter observations also revealed that while the equator of the sun, where the most sunspots appear, possesses the strongest magnetic fields, those at the poles of our star have a complex and ever-changing structure. The Solar Orbiter's SPICE instrument provided another first for the ESA spacecraft, allowing scientists to track elements via their unique emissions as they move through the sun. Tracing the specific spectral lines of elements like hydrogen, carbon, oxygen, neon, and magnesium, a process called "Doppler measurement," revealed how materials flow through different layers of the sun. The Solar Orbiter also allowed scientists to measure the speed of carbon atoms as they are ejected from the sun in plumes and jets. "This is just the first step of Solar Orbiter's 'stairway to heaven.' In the coming years, the spacecraft will climb further out of the ecliptic plane for ever better views of the sun's polar regions," ESA's Solar Orbiter project scientist Daniel Muller said. "These data will transform our understanding of the sun's magnetic field, the solar wind, and solar activity."

Last year's Pentagon report reviewing UFO reports "left out the truth behind some of the foundational myths about UFOs," reports the Wall Street Journal.

"The Pentagon itself sometimes deliberately fanned the flames, in what amounted to the U.S. government targeting its own citizens with disinformation." The congressionally ordered probe took investigators back to the 1980s, when an Air Force colonel visited a bar near Area 51, a top-secret site in the Nevada desert. He gave the owner photos of what might be flying saucers. The photos went up on the walls, and into the local lore went the idea that the U.S. military was secretly testing recovered alien technology. But the colonel was on a mission — of disinformation. The photos were doctored, the now-retired officer confessed to the Pentagon investigators in 2023. The whole exercise was a ruse to protect what was really going on at Area 51: The Air Force was using the site to develop top-secret stealth fighters, viewed as a critical edge against the Soviet Union. Military leaders were worried that the programs might get exposed if locals somehow glimpsed a test flight of, say, the F-117 stealth fighter, an aircraft that truly did look out of this world. Better that they believe it came from Andromeda.
That's not the only example. The Journal spoke to Robert Salas, now 84, who in 1967 was a 26-year-old Air Force captain "sitting in a walk-in closet-sized bunker, manning the controls of 10 nuclear missiles in Montana." Suddenly all 10 missiles were disabled after reports of "a glowing reddish-orange oval was hovering over the front gate... The next morning a helicopter was waiting to take Salas back to base. Once there he was ordered: Never discuss the incident."

58 years later, the Journal reports.... The barriers of concrete and steel surrounding America's nuclear missiles were thick enough to give them a chance if hit first by a Soviet strike. But scientists at the time feared the intense storm of electromagnetic waves generated by a nuclear detonation might render the hardware needed to launch a counterstrike unusable. To test this vulnerability, the Air Force developed an exotic electromagnetic generator that simulated this pulse of disruptive energy without the need to detonate a nuclear weapon... But any public leak of the tests at the time would have allowed Russia to know that America's nuclear arsenal could be disabled in a first strike. The witnesses were kept in the dark. To this day Salas believes he was party to an intergalactic intervention to stop nuclear war which the government has tried to hide.
"We were never briefed on the activities that were going on, the Air Force shut us out of any information," Salas tells the Journal.

But it's not just secrecy. Some military men were told directly that they were working on alien technology, according to Pentagon investigator Sean Kirkpatrick: A former Air Force officer was visibly terrified when he told Kirkpatrick's investigators that he had been briefed on a secret alien project decades earlier, and was warned that if he ever repeated the secret he could be jailed or executed. The claim would be repeated to investigators by other men who had never spoken of the matter, even with their spouses.

It turned out the witnesses had been victims of a bizarre hazing ritual. For decades, certain new commanders of the Air Force's most classified programs, as part of their induction briefings, would be handed a piece of paper with a photo of what looked like a flying saucer. The craft was described as an antigravity maneuvering vehicle. The officers were told that the program they were joining, dubbed Yankee Blue, was part of an effort to reverse-engineer the technology on the craft. They were told never to mention it again. Many never learned it was fake. Kirkpatrick found the practice had begun decades before, and appeared to continue still... Investigators are still trying to determine why officers had misled subordinates, whether as some type of loyalty test, a more deliberate attempt to deceive or something else. After that 2023 discovery, Kirkpatrick's deputy briefed President Joe Biden's director of national intelligence, Avril Haines, who was stunned... "We are talking about hundreds and hundreds of people. These men signed NDAs. They thought it was real."
The article also notes that reports of Unidentified Aerial Phenomenon "skyrocketed" after May of 2023 — but that "Many pilot accounts of floating orbs were actually reflections of the sun from Starlink satellites, investigators found."

"Everyone has a blog these days, even Claude," Anthropic wrote this week on a page titled "Claude Explains."

"Welcome to the small corner of the Anthropic universe where Claude is writing on every topic under the sun".

Not any more. After blog posts titled "Improve code maintainability with Claude" and "Rapidly develop web applications with Claude" — Anthropic suddenly removed the whole page sometime after Wednesday. But TechCrunch explains the whole thing was always less than it seemed, and "One might be easily misled into thinking that Claude is responsible for the blog's copy end-to-end." According to a spokesperson, the blog is overseen by Anthropic's "subject matter experts and editorial teams," who "enhance" Claude's drafts with "insights, practical examples, and [...] contextual knowledge."

"This isn't just vanilla Claude output — the editorial process requires human expertise and goes through iterations," the spokesperson said. "From a technical perspective, Claude Explains shows a collaborative approach where Claude [creates] educational content, and our team reviews, refines, and enhances it...." Anthropic says it sees Claude Explains as a "demonstration of how human expertise and AI capabilities can work together," starting with educational resources. "Claude Explains is an early example of how teams can use AI to augment their work and provide greater value to their users," the spokesperson said. "Rather than replacing human expertise, we're showing how AI can amplify what subject matter experts can accomplish [...] We plan to cover topics ranging from creative writing to data analysis to business strategy...."

The Anthropic spokesperson noted that the company is still hiring across marketing, content, and editorial, and "many other fields that involve writing," despite the company's dip into AI-powered blog drafting. Take that for what you will.