A "city killer" asteroid whizzed past earth Thursday that "would have hit with over 30 times the energy of the atomic blast at Hiroshima," according to one astronomer professor.

Long-time Slashdot reader SonicSpike shared a Washington Post story that begins with a reaction from Alan Duffy, lead scientist at the Royal Institution of Australia: "I was stunned," he said. "This was a true shock."

This asteroid wasn't one that scientists had been tracking, and it had seemingly appeared from "out of nowhere," Michael Brown, a Melbourne-based observational astronomer, told The Washington Post. According to data from NASA, the craggy rock was large, an estimated 57 to 130 metres wide (187 to 427 feet), and moving fast along a path that brought it within about 73,000 kilometres (45,000 miles) of Earth. That's less than one-fifth of the distance to the moon and what Duffy considers "uncomfortably close...."

The asteroid's presence was discovered only earlier this week by separate astronomy teams in Brazil and the United States. Information about its size and path was announced just hours before it shot past Earth, Brown said. "It shook me out my morning complacency," he said. "It's probably the largest asteroid to pass this close to Earth in quite a number of years."

So how did the event almost go unnoticed?
Scientists have spotted 90% of asteroids that more than half a mile wide -- but this asteroid was smaller, faster, and had an unusual orbit.

"It should worry us all, quite frankly," one scientist told the Post. "It's not a Hollywood movie. It is a clear and present danger."

An anonymous reader quotes a report from The Verge: A new report from The Wall Street Journal shares some of the proposals for Saudi Arabia's biggest megaproject yet: a city built in the desert named Neom, where robots will outnumber humans and hologram teachers will educate genetically-enhanced students. These are only proposals, of course, dreamt up by American consulting firms like McKinsey and Boston Consulting who have no incentive to bring Saudi leaders down to Earth. But all the same, they give you a flavor of what trillions of dollars of oil wealth will do to your sense of proportion.

The whole Neom project is undeniably fascinating. It was first announced in 2017, with Saudi Arabia's de-facto leader, Crown Prince Mohammed bin Salman, saying he wants the city to attract the "world's greatest minds and best talents." According to planning documents reported by the WSJ, bin Salman "envisions Neom the largest city globally by GDP, and wanted to understand what he can get with up to 500 billion USD investment." The project is the flagpole of Saudi Arabia's plans to diversify the country's economy away from oil. MBS and other Saudi leaders known this source of revenue can't last forever, and they're keen to develop cities like Neom as new commercial hubs. As currently planned, Neom will occupy a region the size of Massachusetts. This will include a huge coastal urban sprawl; outlying towns and villages; advance manufacturing hubs in industries like biotech and robotics; and links with international shipping routes. Early building work has already begun, with facilities including a new airport and palace. Some of the key features of the city include cloud seeding to make it rain, dystopian surveillance to keep citizens safe, genetic engineering to increase human strength and IQ, robot cage fights and "maids," flying taxis, and even a fake moon that could perhaps be created by a fleet of drones or via live-streaming images from space.

The report notes that it's anyone's guess as to whether Neom will live up to its planners' dreams. What may hinder its success is Saudi Arabia's corruption, difficult legal system, and unappealing social norms. "Alcohol is banned; women's rights are restricted; and homosexuality is illegal," the report notes. There's also the sweltering weather that'll only get worse with climate change.

davidwr writes: Two days after the 50th anniversary of the first moon landing, the journal Nature Geoscience published a paper claiming there may be "thick ice deposits inside permanently shadowed simple craters" on the moon. The paper compares craters on the moon to similar craters on Mercury that are known to contain thick ice deposits. While the article is paywalled, the dataset, code, references, and supplemental information are available on the abstract's page. If the researchers' ideas prove correct, it would mean that there are millions of tons of ice on the surface of the moon -- far more than has been thought by most moon scientists.

India took a giant leap in its space program on Monday after its space agency launched a spacecraft that is scheduled to touch down on the Moon in September. From a report: The Indian Space Research Organization (ISRO), which is India's equivalent of NASA, confirmed the successful launch of the spacecraft as the nation inches closer to become only the fourth country -- after the United States, China, and the Soviet Union -- to land a spacecraft on the Moon. Chandrayaan-2 aims to land on a plain surface that covers the ground between two of the Moon's craters, Simpelius N and Manzinus C. The spacecraft was originally scheduled to launch from the Satish Dhawan Space Centre, Sriharikota in Andhra Pradesh on July 15, but ISRO postponed it less than 20 minutes ahead of the deadline citing a "technical glitch." ISRO said it resolved the issue last week.

Everything about India's homegrown lunar mission -- dubbed Chandrayaan-2 (Sanskrit for "moon vehicle") -- is a technological marvel. The spacecraft -- which is sitting atop the country's most powerful rocket to date, a Geosynchronous Satellite Launch Vehicle called Mark III -- is carrying an orbiter, a lunar lander called Vikram and six-wheeled rover Pragyan (Sanskrit for "wisdom"). In early September, the lander, which is named after Vikram Sarabhai, the father of ISRO, is scheduled to detach from the orbiter. Until then, Chandrayaan-2 will embark on a slow journey to the Moon, staying in an elliptical orbit. The mission's budget is just $141 million, significantly lower than those of other countries, and less than half of the recently released blockbuster "Avengers: Endgame." The orbiter is designed to operate for at least one year, but lander and rover are expected to operate for just a couple of weeks.

"NASA's orbiting Lunar Gateway is either essential for a moon landing or a boondoggle in the making," writes IEEE Spectrum.

the_newsbeagle writes: NASA is under pressure to put humans back on the moon by 2024... NASA's plan for meeting that ambitious target relies on building a space station in lunar orbit, called the Gateway. NASA says it will use its (over budget and behind schedule) SLS rocket and Orion crew capsule to dock at this (yet unbuilt) Gateway, then send down a lunar lander. Critics say this is a stupid and over-complicated plan.

This article by veteran space reporter Jeff Foust explains how NASA got itself into this situation.
From the article: Critics of the Gateway argue that NASA shouldn't just scale back the space station -- it should cancel the project altogether. If you want to go to the surface of the moon, the refrain goes, go there directly, as the Apollo missions did a half century ago. Building an outpost in lunar orbit adds expense, delay, and complications to a task that is already hard enough....

Critics say that technological alternatives are emerging in the commercial space sector. They look to Blue Origin, the space company founded by Amazon billionaire Jeff Bezos and based near Seattle. Blue Origin is building both a reusable heavy-lift rocket, called New Glenn, and a lunar lander known as Blue Moon. Another contender is Elon Musk's SpaceX, based in Hawthorne, Calif., which is also working on a fully reusable rocket. It will carry an upper stage called Starship, which the company says could land directly on the moon and carry heavy cargo. "Having that vehicle on the moon can basically serve as the core of a pretty significant lunar outpost, growing with time," said Paul Wooster, principal Mars development engineer at SpaceX.
The article ends by presenting two possibilities.

• "If NASA, heedful of sunk costs and political realities, continues to march toward the Gateway, we may indeed witness a triumphant return of NASA astronauts to the moon's surface in 2024..."
• "The determined billionaires behind SpaceX and Blue Origin might not wait around for NASA, and the next moon boots in the regolith might stamp a corporate logo in the dust."

It's exactly one half century from that moment in time when men first walked on the moon, writes NASA administrator Jim Bridenstine.

"Today, on the golden anniversary of the Apollo 11 moon landing, NASA looks back with heartfelt gratitude for the Apollo generation's trailblazing courage as we -- the Artemis generation -- prepare to take humanity's next giant leap to Mars." The lethargic lull of scientific fatalism afflicted portions of America then as it sometimes does today. There is nothing inevitable about scientific discovery nor is there a predetermined path of cutting-edge innovation. Long hours of arduous study and experimentation are required merely to glimpse a flicker of enlightenment that can lead to greater heights of human achievement...

The Apollo program hastened ground-breaking technological advancements that continue to bestow benefits to modern civilization today. Flame resistant textiles, water purification systems, cordless tools, more effective dialysis machines and improvements to food preservation and medicine are just some of the innovative wonders generated during that era. Furthermore, NASA's utilization of integrated circuits on silicon chips aboard the lunar module's computer unit helped jumpstart the budding computer industry into the massive enterprise it is today. Perhaps the most enduring legacy of the Apollo missions was their ability to inspire young Americans across the country to join science, technology, engineering and math related fields of study...

After more than 50 years, the benefits of human space exploration to humanity are clear. By proud example, the Apollo program taught us we cannot venture aimlessly into the uncharted territory of future discovery merely hoping to happen upon greater advancement. Technological progress is a deliberate choice made by investing in missions that will expand our limits of understanding and capability...

NASA is preparing to use the lunar surface as a proving ground to perfect our scientific and technological knowledge and utilize international partnerships, as well as the growing commercial space industry.

This time when we go back to the moon we are going to stay...

In an interview with Norah O'Donnell of "CBS Evening News," Amazon CEO Jeff Bezos explained why he's investing much of his Amazon fortune in the development of space technologies through his aerospace company Blue Origin. Why? "Because I think it's important," Bezos said. "I think it is important for this planet. I think it's important for the dynamism of future generations. It is something I care deeply about. And it is something I have been thinking about all my life." From the report: Bezos -- who says "you don't choose your passions, your passions choose you" -- became fascinated with space when he was a child watching astronauts Buzz Aldrin and Neil Armstrong land on the moon, he tells O'Donnell. Further, developing space technologies is critical for human beings to have a long future, Bezos says. "We humans have to go to space if we are going to continue to have a thriving civilization," Bezos says. "We have become big as a population, as a species, and this planet is relatively small. We see it in things like climate change and pollution and heavy industry. We are in the process of destroying this planet. And we have sent robotic probes to every planet in the solar system -- this is the good one. So, we have to preserve this planet."

To do that will require being able to live and work in space, says Bezos. "We send things up into space, but they are all made on Earth. Eventually it will be much cheaper and simpler to make really complicated things, like microprocessors and everything, in space and then send those highly complex manufactured objects back down to earth, so that we don't have the big factories and pollution generating industries that make those things now on Earth," Bezos says. "And Earth can be zoned residential." It will be "multiple generations" and "hundreds of years" before this is a reality, Bezos said on CBS, but with Blue Origin he is working to develop the technology that will make it possible.

"Monday's Wall Street Journal includes a special Apollo 11 feature," writes Slashdot reader Outatime in honor of the 50th anniversary since Apollo 11's Saturn V launched from the Kennedy Space Center. "[O]f particular interest to many Slashdot nerds is the piece on the pioneering computer hardware and software that took three astronauts, and landed two, on the moon." Here's an excerpt from the report: The [MIT Instrumentation Laboratory or I-Lab] was housed in a former underwear factory overlooking the Charles River, now long since demolished. The Apollo engineers and programmers labored at scuffed metal desks in cubicles with code scribbled on the chalkboard, slide rules on the table, cigarette butts on the linoleum floor. Fanfold computer printouts were stacked up to 6 feet high, like termite mounds. The lab had pioneered inertial guidance systems for the nuclear-warhead-tipped missiles of the Cold War, such as the submarine-launched Polaris intercontinental ballistic missiles. Funded by the U.S. Air Force, it also developed a plan in the late 1950s to fly a computerized probe to Mars and back. MIT received the first major Apollo contract, the only one awarded to a university, and the only one given without competitive bidding.

In an era when a computer used fragile tubes, ran on punch cards and filled an entire room, the I-Lab engineers had invented a briefcase-size digital brain packed with cutting-edge integrated circuits and memory so robust it could withstand a lightning bolt -- a direct ancestor of almost all computers today. Unlike other machines of its era, it could juggle many tasks at once and make choices of which to prioritize as events unfolded. Apollo missions carried two of these computers, one aboard the command module and one in the lunar lander, running almost identical software. Only the lunar lander, though, required the extra code to set down safely on the moon.

We're reviving an old Slashdot tradition -- the review. Whenever there's something especially geeky -- or relevant to our present moment -- we'll share some thoughts. And I'd like to start with Jonathan Coulton's amazing 2017 album Solid State, and its trippy accompanying graphic novel adaptation by Matt Fraction. I even tracked down Jonathan Coulton on Friday for his thoughts on how it applies to our current moment in internet time...

"When I started work on Solid State, the only thing I could really think of that I wanted to say was something like, 'The internet sucks now'," Coulton said in 2017 in an epilogue to the graphic novel. "It's a little off-brand for me, so it was a scary place to start..."

So what does he think today? And what did we think of his album...?

The Indian Space Research Organization (ISRO) is planning to launch a rocket to the moon. UPDATE: 2:28: The launch "has been called off for today," the ISRO posted on Twitter.

But when the re-scheduled launch happens, you can watch it live on two YouTube channels, on Twitter, Facebook, or webcast on the ISRO's web site.

TechCrunch has also embedded a livestreaming video in their report: Chandrayaan-2 will carry lunar lander Vikram, which will deliver ISRO rover Pragyan to the surface at the pole, with a target landing zone of a plain that covers the ground between two of the Moon's craters, Simpelius N and Manzinus C. The rocket used for the launch is the GSLV Mk-III, India's most powerful launch vehicle ever, and the orbiter used for this mission will relay back information from the lander and rover to Earth via the Indian Deep Space Network, as well as make its own observations during its planned one-year mission lifespan.

The mission will seek to take a number of measurements of the lunar surface, including topographic, mineral makeup, seismographic, chemical analytics and more, with an eye to shedding more light on the Moon's origins. If all goes to plan, the lunar orbiter will make its way to to Moon over the next couple of months and aim to soft land the Vikram at the South Pole target site on September 6, 2019.

This is a historic mission for a few reasons, including being the first ever soft-landing attempt at the Moon's South Pole region, as well as being the first Indian mission to attempt a soft landing using all home-grown lander and rover technology. If successful, India will be only the fourth country ever to have soft-landed a vehicle on the lunar surface.

An anonymous reader quotes a report from CNN: South Korea has warned that an escalating trade dispute with Japan could hurt the global tech industry. President Moon Jae-in said Wednesday that Japan's decision to restrict exports to South Korea of materials used in memory chips are a "blow to the economy" and threaten to disrupt global supplies. Japan announced earlier this month that companies would need a government license to export three materials to South Korea. The materials -- fluorinated polyamides, photoresists and hydrogen fluoride -- are used to make memory chips and smartphones.

The export controls are a massive headache for South Korean firms Samsung and SK Hynix, who between them control over 63% of the global memory chip market, according to the latest figures from the Korea International Trade Association. South Korean firms sourced 94% of fluorinated polyamides, 92% of photoresists and about 44% of hydrogen fluoride from Japan In the first quarter of this year, data from the association showed. Samsung, the world's biggest seller of smartphones, said in a statement to CNN Business that it was "assessing the current situation and reviewing a number of measures to minimize the impact on our production."

schwit1 shares a report: Just after Memorial Day this year, I began talking regularly with the pilot of the first spacecraft to land on the Moon. We had spoken before, but this was different -- it seemed urgent. Every week or two, Buzz Aldrin would call to discuss his frustration with the state of NASA and his concerns about the looming 50th anniversary of the Apollo 11 Moon landing without a lack of discernible progress to get back. Even at 89, Aldrin remains remarkably engaged in the aerospace community, often showing up to meetings and conferences unannounced. Aldrin asks questions. He talks to the principals. In the last two years, the aerospace legend has been to the White House for major space announcements by President Trump, served as an adviser to the National Space Council, and supported the White House goal of returning to the Moon by 2024.

But what NASA has been doing to get back there, for the better part of two decades, just hasn't been working. President Bush directed NASA back to the Moon more than 15 years ago, and in one form or another, NASA has been spending billions of dollars each year to build a big, heavy spacecraft and a bigger, much heavier rocket as the foundation for such a return. Along the way, NASA has enriched a half-dozen large aerospace contractors and kept Congress happy. But the space agency still can't even launch its own astronauts into low-Earth orbit, let alone deep space or the Moon. "I've been going over this in my mind," Aldrin told Ars "We've been fumbling around for a long, long time. There has to be a better way of doing things. And I think I've found it."

[...] For all of the time and money invested in SLS and Orion, these vehicles lack the energy to fly a mission into low lunar orbit and back. Indeed, the engine powering Orion's service module has less than one-third of the thrust of the Apollo propulsion system that flew Aldrin to the Moon in 1969. This is a major reason NASA intends to build a Lunar Gateway -- a small space station -- in a distant orbit around the Moon. From there, the Gateway will come no closer than 1,000km to the lunar surface and spend most of its seven-day orbit much farther away. "One thing that surprises me is the lack of performance," Aldrin said, discussing these vehicles NASA has spent so long developing. "It forces NASA into this weird orbit. And how long is SLS going to last until Blue Origin or SpaceX replaces it? Not long. How long is that heavy Orion spacecraft, with an under-powered European service module, going to hang around in the inventory? Not long."

Meet ploonets: planets of moonish origin. In other star systems, some moons could escape their planets and start orbiting their stars instead, new simulations suggest. Scientists have dubbed such liberated worlds "ploonets," and say that current telescopes may be able to find the wayward objects. From a report: Astronomers think that exomoons -- moons orbiting planets that orbit stars other than the sun -- should be common, but efforts to find them have turned up empty so far. Astrophysicist Mario Sucerquia of the University of Antioquia in MedellÃn, Colombia and colleagues simulated what would happen to those moons if they orbited hot Jupiters, gas giants that lie scorchingly close to their stars. Many astronomers think that hot Jupiters weren't born so close, but instead migrated toward their star from a more distant orbit.

As the gas giant migrates, the combined gravitational forces of the planet and the star would inject extra energy into the moon's orbit, pushing the moon farther and farther from its planet until eventually it escapes, the researchers report June 29 [PDF] at arXiv.org. "This process should happen in every planetary system composed of a giant planet in a very close-in orbit," Sucerquia says. "So ploonets should be very frequent." Some ploonets may be indistinguishable from ordinary planets. Others, whose orbits keep them close to their planet, could reveal their presence by changing the timing of when their neighbor planet crosses, or transits, in front of the star.

PolygamousRanchKid quotes a report from The Independent: A mistake made during the Apollo 11 moon landing could have brought lunar germs to the Earth, astronauts have revealed. When the three astronauts flew to the Moon and back, exactly 50 years ago this month, NASA worked hard to ensure that no bugs were brought back from the lunar surface. All three of the Apollo 11 crew were put into special clothes, scrubbed down and taken to a quarantine facility where they lived until scientists could be sure the Earth would not be contaminated. But interviews from a new documentary -- filmed by PBS and revealed by Space.com -- show that the plan to keep Earth could easily have failed, and that space bugs could have got into the Earth's atmosphere despite Nasa's best efforts. The astronauts noted that Nasa did not think there would be anything alive on the Moon that could be brought back down to the Earth. But the precautions were taken in case there were. "Look at it this way," astronaut Michael Collins said. "Suppose there were germs on the moon. There are germs on the moon, we come back, the command module is full of lunar germs. The command module lands in the Pacific Ocean, and what do they do? Open the hatch. You got to open the hatch! All the damn germs come out!"

Slashdot reader stevent1965 writes: The costs of running the International Space Station are a burden for NASA's budget. It has cost over $100 billion to construct and annual operating expenses run between $3 and $4 billion per year, representing a substantial percentage [about half] of NASA's manned space exploration budget. What to do, what to do?

A potential solution is to turn over operations (if not ownership) to private enterprise (Elon, are you listening?) Commercialization of space exploration may be anathema to some, but there is ample precedent for the government ceding control of publicly-funded endeavors to private enterprises. The Internet is the obvious example.

Why not give corporations control of the ISS? Are there drawbacks? Benefits? Which will prevail? Let's hear your opinions.
Sunday NPR noted that a few weeks ago NASA held a press event at Nasdaq's MarketSite to announce and promote "the commercialization of low Earth orbit," with astronaut Christina Koch beaming down a video from space to say that the crew was "so excited" to be a part of NASA "as our home and laboratory in space transitions into being accessible to expanded commercial and marketing opportunities" (as well as to "private astronauts.")

But there are big logistical and financial hurdles. (Even NASA admits to NPR that revenue-generating opportunities first "need to be cultivated by the creative and entrepreneurial private sector.") So leave your own best thoughts in the comments -- the how, why, what if, or why not.

Should the International Space Station go commercial?

"From JFK's real motives to the Soviets' secret plot to land on the Moon at the same time, a new behind-the-scenes view of an unlikely triumph 50 years ago," writes schwit1 sharing a new article from Smithsonian magazine titled "What You Didn't Know About the Apollo 11 Mission."

It's an excerpt from the recently-released book ONE GIANT LEAP: The Impossible Mission That Flew Us to the Moon. The Moon has a smell. It has no air, but it has a smell... All the astronauts who walked on the Moon noticed it, and many commented on it to Mission Control.... Cornell University astrophysicist Thomas Gold warned NASA that the dust had been isolated from oxygen for so long that it might well be highly chemically reactive. If too much dust was carried inside the lunar module's cabin, the moment the astronauts repressurized it with air and the dust came into contact with oxygen, it might start burning, or even cause an explosion. (Gold, who correctly predicted early on that the Moon's surface would be covered with powdery dust, also had warned NASA that the dust might be so deep that the lunar module and the astronauts themselves could sink irretrievably into it.) Among the thousands of things they were keeping in mind while flying to the Moon, Armstrong and Aldrin had been briefed about the very small possibility that the lunar dust could ignite....

The Apollo spacecraft ended up with what was, for its time, the smallest, fastest and most nimble computer in a single package anywhere in the world. That computer navigated through space and helped the astronauts operate the ship. But the astronauts also traveled to the Moon with paper star charts so they could use a sextant to take star sightings -- like 18th-century explorers on the deck of a ship -- and cross-check their computer's navigation. The software of the computer was stitched together by women sitting at specialized looms -- using wire instead of thread. In fact, an arresting amount of work across Apollo was done by hand: The heat shield was applied to the spaceship by hand with a fancy caulking gun; the parachutes were sewn by hand, and then folded by hand. The only three staff members in the country who were trained and licensed to fold and pack the Apollo parachutes were considered so indispensable that NASA officials forbade them to ever ride in the same car, to avoid their all being injured in a single accident. Despite its high-tech aura, we have lost sight of the extent to which the lunar mission was handmade...

The space program in the 1960s did two things to lay the foundation of the digital revolution. First, NASA used integrated circuits -- the first computer chips -- in the computers that flew the Apollo command module and the Apollo lunar module. Except for the U.S. Air Force, NASA was the first significant customer for integrated circuits. Microchips power the world now, of course, but in 1962 they were little more than three years old, and for Apollo they were a brilliant if controversial bet. Even IBM decided against using them in the company's computers in the early 1960s. NASA's demand for integrated circuits, and its insistence on their near-flawless manufacture, helped create the world market for the chips and helped cut the price by 90 percent in five years. NASA was the first organization of any kind -- company or government agency -- anywhere in the world to give computer chips responsibility for human life. If the chips could be depended on to fly astronauts safely to the Moon, they were probably good enough for computers that would run chemical plants or analyze advertising data.
The article also notes that three times as many people worked on Apollo as on the Manhattan Project to create the atomic bomb.

Gene Kranz may be the most famous flight director in NASA's history. He directed the actual landing portion of the first mission to put men on the moon, Apollo 11, and led Mission Control in saving the crew of Apollo 13 after an oxygen tank exploded on the way to the lunar surface. Now Kranz, 85, has completed another undertaking: the reopening of Mission Control at NASA's Johnson Space Center in Houston. From a report: The room where Kranz directed some of NASA's most historic missions, heralding U.S. exploration of space, was decommissioned in 1992. Since then, it had become a stop on guided tours of the space center but had fallen into disrepair. Kranz led a $5 million multiyear effort to restore Mission Control in time for the 50th anniversary of the first moon landing on July 20.

"I walked into that room last Monday for the first time when it was fully operational, and it was dynamite. I literally wept," Kranz said in an interview with NPR. "The emotional surge at that moment was incredible. I walked down on the floor, and when we did the ribbon-cutting the last two days, believe it or not, I could hear the people talking in that room from 50 years ago. I could hear the controllers talking." The room also brought back memories for Kranz of a shared sense of purpose. "That group of people united in pursuit of a cause, and basically the result was greater than the sum of the parts. There was a chemistry that was formed," Kranz said. "[The room] also has a meaning related to the American psyche, that what America will dare, America will do," Kranz said.

A team of researchers affiliated with several institutions in Spain and the U.S. has announced that they have discovered a new property of light -- self-torque. Their findings have been published in the journal Science. Phys.Org reports: Scientists have long known about such properties of light as wavelength. More recently, researchers have found that light can also be twisted, a property called angular momentum. Beams with highly structured angular momentum are said to have orbital angular momentum (OAM), and are called vortex beams. They appear as a helix surrounding a common center, and when they strike a flat surface, they appear as doughnut-shaped. In this new effort, the researchers were working with OAM beams when they found the light behaving in a way that had never been seen before.

The experiments involved firing two lasers at a cloud of argon gasâ"doing so forced the beams to overlap, and they joined and were emitted as a single beam from the other side of the argon cloud. The result was a type of vortex beam. The researchers then wondered what would happen if the lasers had different orbital angular momentum and if they were slightly out of sync. This resulted in a beam that looked like a corkscrew with a gradually changing twist. And when the beam struck a flat surface, it looked like a crescent moon. The researchers noted that looked at another way, a single photon at the front of the beam was orbiting around its center more slowly than a photon at the back of the beam. The researchers promptly dubbed the new property self-torque -- and not only is it a newly discovered property of light, it is also one that has never even been predicted. Their technique may be used to modulate the orbital angular momentum of light in ways very similar to modulating frequencies in communications equipment, leading to the development of novel devices that make use of manipulating extremely tiny materials.

NASA announced Thursday that it is sending a drone-style quadcopter to Titan, Saturn's largest moon. Dragonfly, as the mission is called, will be capable of soaring across the skies of Titan and landing intermittently to take scientific measurements, studying the world's mysterious atmosphere and topography while searching for hints of life (Warning: source may be paywalled; alternative source) on the only world other than Earth in our solar system with standing liquid on its surface. The New York Times reports: The mission will be developed and led from the Applied Physics Laboratory at Johns Hopkins University in Laurel, Md. The spacecraft is scheduled to launch in 2026. Once at Titan in 2034, Dragonfly will have a life span of at least two-and-a-half years, with a battery that will be recharged with a radioactive power source between flights. Cameras on Dragonfly will stream images during flight, offering people on Earth a bird's-eye view of the Saturn moon. In addition to a camera, Dragonfly will carry an assortment of scientific instruments: spectrometers to study Titan's composition; a suite of meteorology sensors; and even a seismometer to detect titanquakes when it lands on the ground. Drills in the landing skids will collect samples of the Titan surface for onboard analysis.

Earlier this week, Amazon and Blue Origin founder Jeff Bezos explained how its spacecraft will eventually be powered with fuel harvested from the moon. CNBC reports: "We know things about the moon now we didn't know about during the Apollo days," Bezos said, speaking at the JFK Space Summit in Boston, Massachusetts. One of the things learned since Apollo that Bezos highlighted is that there are deposits of water ice at the bottom of craters on the moon. "We can harvest that ice and use to make hydrogen and oxygen, which are rocket propellants," Bezos said.

Blue Origin is developing its "Blue Moon" lunar lander, which Bezos unveiled last month. Bezos said Blue Moon is powered by a BE-7 engine, which uses hydrogen and oxygen as its two fuel sources. "The reason we chose those propellants is because... we know one day we'll be refueling that vehicle on the surface of the moon from propellants made on the surface of the moon from that water ice," Bezos said.