Jim Lovell, the legendary NASA astronaut who commanded the Apollo 13 "successful failure" mission, has died at age 97. From a report: Lovell was already well-known among NASA astronauts, having flown to space on the Gemini 7, Gemini 12 and Apollo 8 missions, before he was selected to command Apollo 13, which would have marked the third successful crewed moon landing for NASA. But during the ill-fated mission -- which carried Lovell as well as astronauts John Swigert Jr. and Fred Haise Jr. on board -- an oxygen tank located on the crew's service module exploded when they were about 200,000 miles (322,000 kilometers) away from Earth.

Lovell delivered the news to mission control, saying "Houston, we've had a problem." With the damage effectively taking out the crew's power source and other life support supplies, the Apollo 13 crew had to abruptly abandon their trek to the lunar surface and use several engine burns to swing around the far side of the moon and put themselves on a course back toward Earth. The three-person crew made a high-stakes splashdown return in the South Pacific Ocean about three days after the tank explosion, marking the conclusion of what has come to be known as the "successful failure" of the Apollo missions. The ordeal was fictionalized in Ron Howard's 1995 film "Apollo 13." [...]

Lovell was the first astronaut to make four spaceflights, totaling more than 715 hours in space. He was part of NASA's second-ever astronaut class, selected in September 1962 and nicknamed the "New Nine." And joining the Apollo 13 crew after having first served on Apollo 8, which intentionally circumnavigated the moon but did not land on its surface, made Lovell the first human ever to see the moon up close for a second time. Further reading: Acting NASA Administrator Reflects on Legacy of Astronaut Jim Lovell (Source: NASA)

An anonymous reader quotes a report from ZDNet: In an interview, Lansweeper, an IT asset discovery and inventory company, revealed to ZDNET that, in its analysis of over 15 million identified consumer desktop operating systems, it found that Linux desktops currently account for just over 6% of PC market share. This news comes after several other studies have shown the Linux desktop is right around the 6% mark. Indeed, according to the US Federal Government Website and App Analytics count, the Linux desktop market share over the last 90 days has reached 6.3%, a new high. In July, according to StatCounter, the Linux desktop also set a record high by its metrics with 5.24%.

An anonymous reader quotes a report from Phys.org: The mission team of NASA's Jupiter-orbiting Juno spacecraft executed a deep-space move in December 2023 to repair its JunoCam imager to capture photos of the Jovian moon Io. Results from the long-distance save were presented during a technical session on July 16 at the Institute of Electrical and Electronics Engineers Nuclear & Space Radiation Effects Conference in Nashville. JunoCam is a color, visible-light camera. The optical unit for the camera is located outside a titanium-walled radiation vault, which protects sensitive electronic components for many of Juno's engineering and science instruments. This is a challenging location because Juno's travels carry it through the most intense planetary radiation fields in the solar system. While mission designers were confident JunoCam could operate through the first eight orbits of Jupiter, no one knew how long the instrument would last after that. Throughout Juno's first 34 orbits (its prime mission), JunoCam operated normally, returning images the team routinely incorporated into the mission's science papers. Then, during its 47th orbit, the imager began showing hints of radiation damage. By orbit 56, nearly all the images were corrupted.

While the team knew the issue might be tied to radiation, pinpointing what was specifically damaged within JunoCam was difficult from hundreds of millions of miles away. Clues pointed to a damaged voltage regulator that was vital to JunoCam's power supply. With few options for recovery, the team turned to a process called annealing, where a material is heated for a specified period before slowly cooling. Although the process is not well understood, the idea is that heating can reduce defects in the material. Soon after the annealing process finished, JunoCam began cranking out crisp images for the next several orbits. But Juno was flying deeper and deeper into the heart of Jupiter's radiation fields with each pass. By orbit 55, the imagery had again begun showing problems.

"After orbit 55, our images were full of streaks and noise," said JunoCam instrument lead Michael Ravine of Malin Space Science Systems. "We tried different schemes for processing the images to improve the quality, but nothing worked. With the close encounter of Io bearing down on us in a few weeks, it was Hail Mary time: The only thing left we hadn't tried was to crank JunoCam's heater all the way up and see if more extreme annealing would save us." Test images sent back to Earth during the annealing showed little improvement in the first week. Then, with the close approach of Io only days away, the images began to improve dramatically. By the time Juno came within 930 miles (1,500 kilometers) of the volcanic moon's surface on Dec. 30, 2023, the images were almost as good as the day the camera launched, capturing detailed views of Io's north polar region that revealed mountain blocks covered in sulfur dioxide frosts rising sharply from the plains and previously uncharted volcanoes with extensive flow fields of lava. To date, the solar-powered spacecraft has orbited Jupiter 74 times. Recently, the image noise returned during Juno's 74th orbit.

"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.

"Commodore has returned from a parallel timeline where tech stayed optimistic, inviting, and human," explains the official web site for "the first real Commodore computer in over 30 years..." You can check out an ad for it here. "Not an emulator. Not a PC... Powered by a FPGA recreation of the original motherboard, wrapped in glowing game-reactive LEDs (or classic beige of course)."

Fast Company calls it "a $299 device that its makers claim is compatible with over 10,000 retro games, cartridges, and peripherals." In a YouTube video posted last month, "Peri Fractic" said he'd purchased the company for "a low seven-figure sum," and said he'd recruited several former Commodore employees to help relaunch the brand. The new C64s are expected to begin shipping as early as October, though that date could slip... There are three models to choose from, all with the same internal components. If you were expecting a vastly outdated machine, however, you're in for a surprise. The Commodore 64 Ultimate will include 128 megabytes of RAM and 16 megabytes of flash memory. It connects to modern monitors via HDMI in high-definition 1080p resolution and features three USB-A ports and one USB-C port. Beyond the computer itself, the power source, and HDMI cable, your $299 also gets you a spiral-bound user guide, a 64-gigabyte USB drive featuring over 50 licensed games, a quick-start guide, and stickers.

Aesthetically, the Commodore 64 Ultimate is available in the original beige or in premium variants: the Starlight Edition, with a clear case and LED lights ($249), or the Founder's Edition, which includes 24-karat gold-plated badges, satin gold keys, and a translucent amber case ($499). Just 6,400 units of the Founder's Edition will be produced, according to the company. The preorder setup resembles a Kickstarter campaign, though it doesn't use that platform. Commodore says all preorders come with a money-back guarantee, but it chose to skip the service's fees. Buyers should be aware that accounts are charged at the time of preorder...

The product will come with a one-year limited warranty, and Commodore says most parts are already in production, including the updated motherboard, the case, and the keycaps that recreate the blocky keys that early users remember.