NASA last week formally approved a $3.35 billion mission to explore Saturn's largest moon with a quadcopter drone. "Dragonfly is a spectacular science mission with broad community interest, and we are excited to take the next steps on this mission," said Nicky Fox, associate administrator of NASA's science mission directorate. "Exploring Titan will push the boundaries of what we can do with rotorcraft outside of Earth." The mission has a launch date of July 2028. Ars Technica reports: After reaching Titan, the eight-bladed rotorcraft lander will soar from place to place on Saturn's hazy moon, exploring environments rich in organic molecules, the building blocks of life. Dragonfly will be the first mobile robot explorer to land on any other planetary body besides the Moon and Mars, and only the second flying drone to explore another planet. NASA's Ingenuity helicopter on Mars was the first. Dragonfly will be more than 200 times as massive as Ingenuity and will operate six times farther from Earth.

Despite its distant position in the cold outer Solar System, Titan appears to be reminiscent of the ancient Earth. A shroud of orange haze envelops Saturn's largest moon, and Titan's surface is covered with sand dunes and methane lakes. Titan's frigid temperatures -- hovering near minus 290 degrees Fahrenheit (minus 179 degrees Celsius) -- mean water ice behaves like bedrock. NASA's Cassini spacecraft, which flew past Titan numerous times before its mission ended in 2017, discovered weather systems on the hazy moon. Observations from Cassini found evidence for hydrocarbon rains and winds that appear to generate waves in Titan's methane lakes. Clearly, Titan is an exotic world. Most of what scientists know about Titan comes from measurements collected by Cassini and the European Space Agency's Huygens probe, which Cassini released to land on Titan in 2005. Huygens returned the first pictures from Titan's surface, but it only transmitted data for 72 minutes.

Dragonfly will explore Titan for around three years, flying tens of kilometers about once per month to measure the prebiotic chemistry of Titan's surface, study its soupy atmosphere, and search for biosignatures that could be indications of life. The mission will visit more than 30 locations within Titan's equatorial region, according to a presentation by Elizabeth Turtle, Dragonfly's principal investigator at the Johns Hopkins University Applied Physics Laboratory. "The Dragonfly mission is an incredible opportunity to explore an ocean world in a way that we have never done before," Turtle said in a statement. "The team is dedicated and enthusiastic about accomplishing this unprecedented investigation of the complex carbon chemistry that exists on the surface of Titan and the innovative technology bringing this first-of-its-kind space mission to life."

quonset writes: Just over two weeks ago, NASA figured out why its Voyager 1 spacecraft stopped sending useful data. They suspected corrupted memory in its flight data system (FDS) was the culprit. Today, for the first time since November, Voyager 1 is sending useful data about its health and the status of its onboard systems back to NASA. How did NASA accomplish this feat of long distance repair? They broke up the code into smaller pieces and redistributed them throughout the memory.

From NASA: "... So they devised a plan to divide the affected code into sections and store those sections in different places in the FDS. To make this plan work, they also needed to adjust those code sections to ensure, for example, that they all still function as a whole. Any references to the location of that code in other parts of the FDS memory needed to be updated as well. The team started by singling out the code responsible for packaging the spacecraft's engineering data. They sent it to its new location in the FDS memory on April 18. A radio signal takes about 22 1/2 hours to reach Voyager 1, which is over 15 billion miles (24 billion kilometers) from Earth, and another 22 1/2 hours for a signal to come back to Earth. When the mission flight team heard back from the spacecraft on April 20, they saw that the modification worked: For the first time in five months, they have been able to check the health and status of the spacecraft. During the coming weeks, the team will relocate and adjust the other affected portions of the FDS software. These include the portions that will start returning science data.

AmiMoJo writes: Knowing your ABCs is essential to academic success, but having a last name starting with A, B or C might also help make the grade. An analysis by University of Michigan researchers of more than 30 million grading records from U-M finds students with alphabetically lower-ranked names receive lower grades. This is due to sequential grading biases and the default order of students' submissions in Canvas -- the most widely used online learning management system -- which is based on alphabetical rank of their surnames.

What's more, the researchers found, those alphabetically disadvantaged students receive comments that are notably more negative and less polite, and exhibit lower grading quality measured by post-grade complaints from students.

Abstract of a paper on National Bureau of Economic Research: Physicians commonly receive marketing-related transfers from drug firms. We examine the impact of these relationships on the prescribing of physician-administered cancer drugs in Medicare. We find that prescribing of the associated drug increases 4\% in the twelve months after a payment is received, with the increase beginning sharply in the month of payment and fading out within a year. A marketing payment also leads physicians to begin treating cancer patients with lower expected mortality. While payments result in greater expenditure on cancer drugs, there are no associated improvements in patient mortality.

Two months ago the team behind NASA's Ingenuity Helicopter released a video reflecting on its historic explorations of Mars, flying 10.5 miles (17.0 kilometers) in 72 different flights over three years. It was the team's way of saying goodbye, according to NASA's video.

And this week, LiveScience reports, Ingenuity answered back: On April 16, Ingenuity beamed back its final signal to Earth, which included the remaining data it had stored in its memory bank and information about its final flight. Ingenuity mission scientists gathered in a control room at NASA's Jet Propulsion Laboratory (JPL) in California to celebrate and analyze the helicopter's final message, which was received via NASA's Deep Space Network, made up of ground stations located across the globe.

In addition to the remaining data files, Ingenuity sent the team a goodbye message including the names of all the people who worked on the mission. This special message had been sent to Perseverance the day before and relayed to Ingenuity to send home.

The helicopter, which still has power, will now spend the rest of its days collecting data from its final landing spot in Valinor Hills, named after a location in J.R.R. Tolkien's "The Lord of the Rings" books.

The chopper will wake up daily to test its equipment, collect a temperature reading and take a single photo of its surroundings. It will continue to do this until it loses power or fills up its remaining memory space, which could take 20 years. Such a long-term dataset could not only benefit future designs for Martian vehicles but also "provide a long-term perspective on Martian weather patterns and dust movement," researchers wrote in the statement. However, the data will be kept on board the helicopter and not beamed back to Earth, so it must be retrieved by future Martian vehicles or astronauts.

"Whenever humanity revisits Valinor Hills — either with a rover, a new aircraft, or future astronauts — Ingenuity will be waiting with her last gift of data," Teddy Tzanetos, an Ingenuity scientist at JPL, said in the statement.
Thursday NASA's Jet Propulsion Laboratory released another new video tracing the entire route of Ingenuity's expedition over the surface of Mars.

"Ingenuity's success could pave the way for more extensive aerial exploration of Mars down the road," adds Spacae.com: Mission team members are already working on designs for larger, more capable rotorcraft that could collect a variety of science data on the Red Planet, for example. And Mars isn't the only drone target: In 2028, NASA plans to launch Dragonfly, a $3.3 billion mission to Saturn's huge moon Titan, which hosts lakes, seas and rivers of liquid hydrocarbons on its frigid surface. The 1,000-pound (450 kg) Dragonfly will hop from spot to spot on Titan, characterizing the moon's various environments and assessing its habitability.

Several "high-profile astronomers" will meet at London's Royal Society (the UK's national academy of sciences), "to question some of the most fundamental aspects of our understanding of the universe.reports Futurism: As The Guardian reports, the luminaries of cosmology will be re-examining some basic assumptions about the universe — right down to the over-a-century-old theory that it's expanding at a constant rate. "We are, in cosmology, using a model that was first formulated in 1922," coorganizer and Oxford cosmologist Subir Sarkar told the newspaper, in an apparent reference to the year Russian astronomer Alexander Friedmann outlined the possibility of cosmic expansion based on Einstein's general theory of relativity. "We have great data, but the theoretical basis is past its sell-by date," he added. "More and more people are saying the same thing and these are respected astronomers."

A number of researchers have found evidence that the universe may be expanding more quickly in some areas compared to others, raising the tantalizing possibility that megastructures could be influencing the universe's growth in significant ways. Sarkar and his colleagues, for instance, are suggesting that the universe is "lopsided" after studying over a million quasars, which are the active nuclei of galaxies where gas and dust are being gobbled up by a supermassive black hole.
The article notes that another theory is that the so-called cosmological constant that's been used for decades "actually varies across space."

Thanks to long-time Slashdot reader schwit1 for sharing the article.

A large-screen IMAX documentary about the James Webb Space Telescope "has just opened in 300 theaters across North America," write an anonymous Slashdot reader, noting that it's playing for one week only. "And it gets a rave review in Forbes." Imagine venturing to the beginning of time and space, exploring cosmic landscapes so vast and beautiful that they've remained unseen by human eyes until now.

This is the promise of "Deep Sky," an extraordinary IMAX presentation that brings the universe's awe-inspiring mysteries closer than ever before. Directed by the Oscar®-nominated filmmaker Nathaniel Kahn and narrated by the equally acclaimed actress Michelle Williams, "Deep Sky" is a monumental journey through the cosmos, powered by the groundbreaking images captured by NASA's Webb Telescope... "Deep Sky" is more than a documentary about a space telescope; it's an immersive experience that invites audiences to see the universe as never before. Through the power of IMAX, viewers are transported across 13 billion years of cosmic history, to the very edges of the observable universe. Here, in stunning clarity, we witness the birth of stars, the formation of galaxies, and the eerie beauty of exoplanets — planets that orbit stars beyond our own Sun. These images, beamed back to Earth by JWST, reveal the universe's vast beauty on a scale that seems only the giant IMAX screen can begin to convey...

What makes "Deep Sky" particularly captivating is its ability to render the incomprehensible beauty and scale of the universe accessible. The IMAX® experience, known for its breathtaking visuals and sound, serves as the perfect medium to convey the majesty of the cosmos.
The review says the film celebrates the achieve of thousands of people working across decades, "aiming to answer some of humanity's oldest questions: Where did we come from? How did the universe begin? Are we alone in the vastness of space?"

The reviewer also spoke to JWST telescope scientist Matt Mountain — in another article applauding the film for "encapsulating the grandeur of space exploration on the IMAX canvas." In "Deep Sky," viewers are taken on a journey from the telescope's construction to its deployment and early operational phases. The documentary highlights the international collaboration and engineering marvels behind the JWST, featuring insights from key scientists and engineers who brought the telescope to life. The film aims to rekindle a sense of wonder about the universe and our place within it, emphasizing the human desire to explore and understand the cosmos.

Longtime Slashdot reader garyisabusyguy shares a report from The Debrief: Dr. Charles Buhler, a NASA engineer and the co-founder of Exodus Propulsion Technologies, has revealed that his company's propellantless propulsion drive, which appears to defy the known laws of physics, has produced enough thrust to counteract Earth's gravity. "The most important message to convey to the public is that a major discovery occurred," Buhler told The Debrief. "This discovery of a New Force is fundamental in that electric fields alone can generate a sustainable force onto an object and allow center-of-mass translation of said object without expelling mass." "There are rules that include conservation of energy, but if done correctly, one can generate forces unlike anything humankind has done before," Buhler added. "It will be this force that we will use to propel objects for the next 1,000 years until the next thing comes."

To document his team's discovery as well as the process behind their work, which Dr. Buhler cautions is in no way affiliated with NASA or the U.S. Government, the outwardly amiable researcher presented his findings at a recent Alternative Propulsion Energy Conference (APEC). Filled with both highly-credentialed career engineers and propulsion hobbyists, APEC is an organization The Debrief once referred to as the World's Most Exclusive (And Strange) Anti-Gravity Club. In conjunction with that presentation, "The Discovery of Propellantless Propulsion: The Direct Conversion of Electrical Energy into Physical Thrust," Dr. Buhler also sat down with APEC co-founder and moderator Tim Ventura to explain how his past in electrostatics, which is his primary area of expertise, ended up being a key component of his discovery of this new force. [...]

Up next, Buhler says his team is seeking funding to test their devices in space to better understand the force at work. "We're hoping to do some demos," said Buhler. "Some space demos. That's what we're trying to get some funding to do. I think that would be a great way to show off the technology." Besides proving once and for all that the force they are seeing is real, the accomplished engineer believes that such tests could encourage other scientists to search for an explanation of what exactly it is they are seeing. "I think it's a good opportunity for people to run these tests, look at them, watch them go in space, watch it move in space, and then say, "what does it imply? What are the implications?'" Until that time, Buhler says he believes his work proves that the force they are seeing is "fundamental" and that understanding it is the next logical step. "You can't deny this," he told Ventura. "There's not a lot to this. You're just charging up Teflon, copper tape, and foam, and you have this thrust."

So, while his team believes their experiments speak for themselves, the veteran scientist says he also believes it is the job of science to analyze and understand this discovery. If successful, he thinks it may even address some of the harder questions in science, including the nature of dark energy or even space/time itself. "It's easy to make these things," he said, "so it's a tool for the scientific community to use to try to explore those hard questions." If there are companies or individuals interested in working with Exodus Propulsion Technologies, Buhler asks that they reach out via their LinkedIn page.

An anonymous reader quotes a report from The Atlantic: In October 2003, Mark Zuckerberg created his first viral site: not Facebook, but FaceMash. Then a college freshman, he hacked into Harvard's online dorm directories, gathered a massive collection of students' headshots, and used them to create a website on which Harvard students could rate classmates by their attractiveness, literally and figuratively head-to-head. The site, a mean-spirited prank recounted in the opening scene of The Social Network, got so much traction so quickly that Harvard shut down his internet access within hours. The math that powered FaceMash -- and, by extension, set Zuckerberg on the path to building the world's dominant social-media empire -- was reportedly, of all things, a formula for ranking chess players: the Elo system.

Fundamentally, what an Elo rating does is predict the outcome of chess matches by assigning every player a number that fluctuates based purely on performance. If you beat a slightly higher-ranked player, your rating goes up a little, but if you beat a much higher-ranked player, your rating goes up a lot (and theirs, conversely, goes down a lot). The higher the rating, the more matches you should win. That is what Elo was designed for, at least. FaceMash and Zuckerberg aside, people have deployed Elo ratings for many sports -- soccer, football, basketball -- and for domains as varied as dating, finance, and primatology. If something can be turned into a competition, it has probably been Elo-ed. Somehow, a simple chess algorithm has become an all-purpose tool for rating everything. In other words, when it comes to the preferred way to rate things, Elo ratings have the highest Elo rating. [...]

Elo ratings don't inherently have anything to do with chess. They're based on a simple mathematical formula that works just as well for any one-on-one, zero-sum competition -- which is to say, pretty much all sports. In 1997, a statistician named Bob Runyan adapted the formula to rank national soccer teams -- a project so successful that FIFA eventually adopted an Elo system for its official rankings. Not long after, the statistician Jeff Sagarin applied Elo to rank NFL teams outside their official league standings. Things really took off when the new ESPN-owned version of Nate Silver's 538 launched in 2014 and began making Elo ratings for many different sports. Some sports proved trickier than others. NBA basketball in particular exposed some of the system's shortcomings, Neil Paine, a stats-focused sportswriter who used to work at 538, told me. It consistently underrated heavyweight teams, for example, in large part because it struggled to account for the meaninglessness of much of the regular season and the fact that either team might not be trying all that hard to win a given game. The system assumed uniform motivation across every team and every game. Pretty much anything, it turns out, can be framed as a one-on-one, zero-sum game. Arpad Emmerich Elo, creator of the Elo rating system, understood the limitations of his invention. "It is a measuring tool, not a device of reward or punishment," he once remarked. "It is a means to compare performances, assess relative strength, not a carrot waved before a rabbit, or a piece of candy given to a child for good behavior."

Researchers in Canada got most of what they were hoping for in the country's 2024 federal budget, with a big boost in postgraduate pay and more funding for research and scientific infrastructure. From a report: "We are investing over $5 billion in Canadian brainpower," said finance minister Chrystia Freeland in her budget speech on 16 April. "More funding for research and scholarships will help Canada attract the next generation of game-changing thinkers."

Postgraduate students and postdoctoral researchers have been advocating for higher pay for the past two years through a campaign called Support Our Science. They requested an increase in the value, and number, of federal government scholarships, and got more than they asked for. Stipends for master's students will rise from Can$17,500 (US$12,700) to $27,000 per year, PhDs stipends that ranged from $20,000 to $35,000 will be set to a uniform annual $40,000 and most postdoctoral-fellowship salaries will increase from $45,000 to $70,000 per annum. The number of scholarships and fellowships provided will also rise over time, building to around 1,720 more per year after five years.

"We're very thrilled with this significant new investment, the largest investment in graduate students and postdocs in over 21 years," says Kaitlin Kharas, a PhD student at the University of Toronto, Canada, and executive director of Support Our Science. "It will directly support the next generation of researchers." Although only a small proportion of students and postdoctoral fellows receive these federal scholarships, other funders tend to use them as a guide for their own stipends. Many postgraduates said that low pay was forcing them to consider leaving Canada to pursue their scientific career, says Kharas, so this funding should help to retain talent in the country.

Sweden is the newest nation to sign onto NASA's Artemis Accords -- a series of non-binding bilateral arrangements for peaceful and responsible exploration. Space.com reports: During a signing event in Stockholm on Tuesday (April 16), Swedish Minister for Education Mats Persson penned the agreement alongside U.S. Ambassador Erik D. Ramanathan. "By joining the Artemis Accords, Sweden strengthens its strategic space partnership with the U.S. on space covering areas such as Swedish space research and the space industry, which in turn also strengthens Sweden's total defense capability," Persson said in a NASA statement. The event in Stockholm comes just on the heels of Switzerland's signing of the Artemis Accords the day before. Greece and Uruguay were also included in February. Sweden is now the 38th nation to join the accords, which were established in 2020, as the first Artemis moon launch inched closer to reality.

The Accords mirror principles set out in 1967, as part of the Outer Space Treaty to help govern international cooperation space. NASA is using the refreshed agreement as a guideline for the Artemis program, which aims to send astronauts back to the moon for the first time since Apollo 17, in 1972. In the agency's statement, NASA administrator Bill Nelson welcomed Sweden to the expanding space club. "Our nations have worked together to discover new secrets in our solar system, and now, we welcome you to a global coalition that is committed to exploring the heavens openly, transparently, responsibly, and in peace," Nelson said, adding, "the United States and Sweden share the same bedrock principles, and we're excited to expand these principles to the cosmos."

Average incomes will fall by almost a fifth within the next 26 years as a result of the climate crisis, according to a study that predicts the costs of damage will be six times higher than the price of limiting global heating to 2C. From a report: Rising temperatures, heavier rainfall and more frequent and intense extreme weather are projected to cause $38tn of destruction each year by mid-century, according to the research, which is the most comprehensive analysis of its type ever undertaken, and whose findings are published in the journal Nature. The hefty toll -- which is far higher than previous estimates -- is already locked into the world economy over the coming decades as a result of the enormous emissions that have been pumped into the atmosphere through the burning of gas, oil, coal and trees.

This will inflict crippling losses on almost every country, with a disproportionately severe impact on those least responsible for climate disruption, further worsening inequality. The paper says the permanent average loss of income worldwide will be 19% by 2049. In the United States and Europe the reduction will be about 11%, while in Africa and south Asia it will be 22%, with some individual countries much higher than this. "It's devastating," said Leonie Wenz, a scientist at the Potsdam Institute for Climate Impact Research and one of the authors of the study. "I am used to my work not having a nice societal outcome, but I was surprised by how big the damages were. The inequality dimension was really shocking."

NASA has confirmed that a piece of metal that tore through a Florida home last month was space junk from the International Space Station. NBC News reports: The agency confirmed Monday that the 1.6-pound object was debris from a cargo pallet that had been intentionally released from the space station three years ago. The pallet, packed with aging batteries, was supposed to burn up harmlessly in Earth's atmosphere, but a piece survived -- the piece that smashed into a house in Naples, Florida, on March 8.

WINK News, a CBS News affiliate in southwestern Florida, first reported the incident. Naples resident Alejandro Otero told the outlet that the object crashed through the roof and two floors of his home. Otero was not home at the time, he told WINK News, but the metal object nearly hit his son, who was two rooms away. In a blog post about the incident, NASA said it had analyzed the object at the Kennedy Space Center in Florida and confirmed that it was part of the equipment used to mount the batteries on the cargo pallet.

The piece of space junk is roughly cylindrical in shape and is about 4-inches tall and 1.6-inches wide. NASA said agency staff studied the object's features and metal composition and matched it to the hardware that had been jettisoned from the space station in 2021. At that time, new lithium-ion batteries had recently been installed at the space station, so the old nickel hydrogen batteries were packed up for disposal. The space station's robotic arm released the 5,800-pound cargo pallet containing the batteries over the Pacific Ocean, as the outpost orbited 260 miles above the Earth's surface, according to NASA. NASA said it will perform a detailed investigation of the latest debris incident to determine how the object withstood the extreme trip through the atmosphere.

SonicSpike shares a report: The quest to return rock materials from Mars to Earth to see if they contain traces of past life is going to go through a major overhaul. The US space agency says the current mission design can't return the samples before 2040 on the existing funds and the more realistic $11bn needed to make it happen is not sustainable. Nasa is going to canvas for cheaper, faster "out of the box" ideas. It hopes to have a solution on the drawing board later in the year.

Returning rock samples from Mars is regarded as the single most important priority in planetary exploration, and has been for decades. Just as the Moon rocks brought home by Apollo astronauts revolutionised our understanding of early Solar System history, so materials from the Red Planet are likely to recast our thinking on the possibilities for life beyond Earth.

After nearly 11 years as CNN's space correspondent, Miles O'Brien found himself in 2003 at the Kennedy Space Center in Florida covering the launch of the space shuttle Columbia: As part of the post-launch routine, NASA began sharing several replays of the launch from various cameras trained on the vehicle. And that was when we saw it. Producer Dave Santucci called me into our live truck, and said, "You got to look at this." It was kind of a grainy image of what looked like a puff of smoke, as if someone dropped a bag of flour on the ground and it broke open. We played it over and over again, and it did not look good at all. The giant orange fuel tank was filled with super cold liquid hydrogen and oxygen, so it was enveloped in insulating foam. A big piece of the foam had broken away near a strut called the "bipod," striking the leading edge of the orbiter's left wing. It was made of reinforced carbon to protect the aluminum structure of the spacecraft from the searing heat of re-entry from space.

I reached out to some of my sources inside the shuttle program. Everyone had seen it, of course, but the people I spoke with cautioned me not to worry. The foam was very light, and it had fallen off on earlier missions and nothing of concern had happened as a result... I wish I hadn't taken my eye off the ball. Space was my beat, and I was uniquely positioned to put this concerning event into the public domain. Like NASA's leadership, I went through a process of convincing myself that it was going to be okay. But I had this sinking feeling. It didn't feel right. A spacecraft re-entering the atmosphere at 17,500 miles an hour — much faster than a rifle bullet — is enveloped in a glowing inferno of plasma...

[As it returned to earth 16 days later] the communication between the ground and the orbiter became non-routine. Producers in the control room realized the gravity of the situation, and we cut to a commercial break to get me off the couch. As I was making my way across the newsroom, I started heaving. I knew in an instant that they were all gone. There was no survivable scenario. I was sickened. It was like a body blow. Somehow I got my act together and started talking. I felt like it was my responsibility to mention the foam strike, to get the information out there to the public. About an hour after Columbia had disintegrated, I shared with a huge global audience what I knew... "That bipod is the place where they think a little piece of foam fell off and hit the leading edge of that wing."

During the mission, I could have easily done a story about the foam strike, spreading the word that some NASA engineers believed there may be some reason for concern. What if I had done that? It might have made a difference.
"A rescue mission would not have been impossible," the article concludes, "and I feel certain that if NASA managers saw that gaping hole in Columbia's wing, they would've tried.

"We will never know for sure, but I do know how so many of us on the ground failed to do our jobs during that mission. It still haunts me."


CNN broadcasts the last two episodes of its four-part series Space Shuttle Columbia: The Final Flight tonight at 9 p.m. EST (time-delayed on the west coast until 9 p.m.PST). CNN's web site offers a "preview" of its live TV offerings here.

The news episodes (along with past episodes) will also be available on-demand starting Monday — "for pay TV subscribers via CNN.com, CNN connected TV and mobile apps." It's also available for purchase on Amazon Prime.