David Matthews writes via Nature: See whether this sounds familiar: you build a piece of software to solve a research question. But when you move on to the next project, there's no one to maintain it. As it ages, it becomes obsolete, and the next academic to tackle a similar problem finds themselves having to reinvent the wheel. [...] Now, a funding initiative hopes to help ease that burden. [...] In January, Schmidt Futures, a science and technology-focused philanthropic organization founded by former Google chief executive Eric Schmidt and his wife Wendy, launched the Virtual Institute for Scientific Software (VISS), a network of centers across four universities in the United States and the United Kingdom. Each institution will hire around five or six engineers, says Stuart Feldman, Schmidt Futures' chief scientist, with funding typically running for five years and being reviewed annually. Overall, Schmidt Futures is putting US$40 million into the project, making it among the largest philanthropic investments in this area. The aim is to overcome a culture of relative neglect in academia for open-source scientific software, Feldman says, adding that support for software engineering is "a line item, just like fuel" at organizations such as NASA. "It's only in the university research lab environment where this is ancillary," he says. [...]

Those setting up VISS centers say Schmidt Futures' steady, relatively long-term funding will help them to overcome a range of problems endemic to academic software. Research grants rarely provide for software development, and when they do, the positions they fund are seldom full-time and long-term. "If you've got all of this fractional effort, it's really hard to hire people and provide them with a real career path," says Andrew Connolly, an astronomer who is also helping to set up the Washington centre. What's more, software engineers tend to be scattered and isolated across a university. "Peer development and peer community is really important to those types of positions," says Stone. "And that would be extraordinarily rare in academia." To counter this, VISS centers hope to create cohesive, stable teams that can learn from one another. [...]

Dario Taraborelli, who helps to coordinate another privately funded scientific-software project at the Chan Zuckerberg Initiative (CZI) in California, says that such initiatives fill a key gap in the scientific-software ecosystem, because funding agencies too often fail to prioritize crucial software infrastructure. Although there are now "substantial" grants dedicated to creating software, he says, there's precious little funding available to maintain what is built. Computer scientist Alexander Szalay, who is helping to set up a VISS centre at Johns Hopkins, agrees, noting that very few programs get to a point where enough researchers use and update them to remain useful. "They don't survive this 'Valley of Death,'" he says. "The funding stops when they actually develop the software prototype."

"On Monday, July 11, President Joe Biden released one of the James Webb Space Telescope's first images in a preview event at the White House in Washington," reports NASA in a press release. The full set of Webb's first full-color images and spectroscopic data will be released tomorrow on Tuesday, July 12 at 10:30 a.m. (14:30 UTC). You can watch the live broadcast of the unveiling here. From the report: This first image from NASA's James Webb Space Telescope is the deepest and sharpest infrared image of the distant universe to date. Known as Webb's First Deep Field, this image of galaxy cluster SMACS 0723 is overflowing with detail. Thousands of galaxies -- including the faintest objects ever observed in the infrared -- have appeared in Webb's view for the first time. This slice of the vast universe covers a patch of sky approximately the size of a grain of sand held at arm's length by someone on the ground.

Released one by one, the first images from the world's largest and most powerful space telescope will demonstrate Webb at its full power, ready to begin its mission to unfold the infrared universe. The first images will be added to this page as they are released.

In October 2020, the agency's OSIRIS-REx spacecraft nearly sank into the surface of the rubbly asteroid while picking up rocks for shipment to Earth in 2023, team members revealed Thursday (July 7). The spacecraft only escaped getting stuck or sinking into oblivion within Bennu by firing its thrusters at the right moment. Space.com reports: "We expected the surface to be pretty rigid," principal investigator Dante Lauretta, a planetary scientist at the University of Arizona, told Space.com. "We saw a giant wall of debris flying away from the sample site. For spacecraft operators, it was really frightening." Now that the spacecraft (more formally known as Origins, Spectral Interpretation, Resource Identification, Security-Regolith Explorer) is safely on its way back to our planet to deliver its precious cargo, scientists are digging into the science implications of the dramatic moment.

"It turns out that the particles making up Bennu's exterior are so loosely packed and lightly bound to each other that they act more like a fluid than a solid," Lauretta said in a University of Arizona statement. That structure is why the OSIRIS-REx sampling probe had such a close call, he and his colleagues determined. The loose surface, made up of particles jostling against each other like plastic balls in a children's play area, has implications for how asteroids were formed and also for planetary defense techniques to protect against potential rogue space rocks coming near our planet, NASA added in a second statement.

On Wednesday evening NASA released a "test" image from the telescope that suggests the forthcoming scientific images and data will be spectacular. Ars Technica reports: The release of the test photo, which NASA casually says is "among the deepest images of the Universe ever taken," almost feels like a flex because it is so good for a throw-away engineering image. The space agency collected the image in late May during a week-long stability test intended to demonstrate the capabilities of the telescope's Fine Guidance Sensor. This instrument helps Webb find and lock onto astronomical targets, and it was built by the Canadian Space Agency.

"The resulting engineering test image has some rough-around-the-edges qualities to it," NASA said in a news release. "It was not optimized to be a science observation; rather, the data was taken to test how well the telescope could stay locked onto a target, but it does hint at the power of the telescope. It carries a few hallmarks of the views Webb has produced during its postlaunch preparations. Bright stars stand out with their six, long, sharply defined diffraction spikes-- an effect due to Webb's six-sided mirror segments. Beyond the stars, galaxies fill nearly the entire background." Ars notes that we will see the public release of the first science images from the James Webb Space Telescope in just five days, beginning at 10:30 am ET (14:30 UTC).

Tuesday Ars Technica reported that "after more than a decade and more than $20 billion in funding, NASA and its litany of contractors are very close to declaring the 111-meter tall rocket ready for its debut launch." Long-time Slashdot reader added "It seems silly saying SLS will launch 'in just two months' for a rocket that was supposed to have first flown in 2016, but here we are."

From Ars Technica's report: On June 20, NASA successfully counted the rocket down to T-29 seconds during a pre-launch fueling test. Although they did not reach T-9 seconds, as was the original goal, the agency's engineers collected enough data to satisfy the requisite information to proceed toward a launch.

During a pair of news conferences last week, NASA officials declined to set a launch target for the mission. However, in an interview Tuesday with Ars, NASA's senior exploration official, Jim Free, said the agency is working toward a launch window of August 23 to September 6. "That's the one we're targeting," Free said. "We'd be foolish not to target that right now. We made incredible progress last week."

Next up is rolling the SLS rocket and Orion spacecraft back to the Vehicle Assembly Building at Kennedy Space Center for final launch preparations, including arming the flight termination system. A team of technicians and engineers will also replace a seal on a "quick disconnect" where a hydrogen leak was observed during fuel loading.... [W]orkers have made their plans to process the vehicle during a relatively quick turnaround. "That group knows exactly what they need to do when we get back," he said. "I don't think we're stretching ourselves to get there. We're probably pushing ourselves a little bit, but we're not going to do something stupid." On this timeline, the SLS rocket could roll back to the launch pad in less than two months.
Friday the Register reported that the rocket's rollback encountered "a delay caused by concerns over the crawlerway" — that is, the 4.2-mile (6.8 km) road of rocks: The massive transporter used to move the Space Launch System between Vehicle Assembly Building (VAB) and launchpad requires a level pathway and teams have been working on the inclined pathway leading to the launchpad where the rocket currently resides to ensure there is an even distribution of rocks to support the mobile launcher and rocket.
But NASASpaceflight.com reported that the roll back actually happened on Saturday — apparently taking ten hours and 18 minutes, "slightly faster than the expected travel time of 11 hours....

"After returning to the VAB, SLS has another six to eight weeks of final launch preparations ahead of the rollout for the debut mission. This still makes the planned launch window possible, although the margins are slim."

CNN reports that a professor and his students at Stanford's Autonomous Systems Lab have received "phase II" funding from NASA's Innovative Advanced Concepts Program (which supports space robotics research) after proving the feasibility of their plan for robots to crawl through space caves. "The team will use the next two years to work on 3D simulations, a robot prototype, develop strategies that help the robot avoid risk, and test out [their cave robot] in a realistic mission environment — likely a cave site in New Mexico or California."

One of the students explains to CNN that "Caves are risky environments, but they're scientifically interesting. Our idea for this robot is to go far before people would get there to do interesting science and scope out the area."

CNN explains why space caves are so crucial: New research suggests that the best chance of finding past or present evidence of life on Mars requires going below its surface — at least 6.6 feet (2 meters) below. Mars has an incredibly thin atmosphere, which means that the surface of the red planet is bombarded by high energy radiation from space, and that could quickly degrade substances like amino acids that provide fragile evidence of life. Those harsh surface conditions also present a challenge for astronauts, which is one reason scientists have suggested that caves on other planets could be the key to future exploration. Vast cave systems on the moon and Mars could act as shelters for future space travelers.

Caves could also contain resources like water, reveal more about the history of a planet — and be havens for evidence of microbial life. On Earth, there are a varied range of cave systems, many of which remain unexplored, and they support diverse groups of microorganisms. But caves are dangerous — and since we've never peered inside a Martian cave, it's difficult to know what to expect.
The cave robot would presumably to be equipped with cameras, microscopes and LIDAR remote sensing, and the team envisions it will be tethered to a power-supplying rover on the surface.

One team member even told CNN the robots could be adapted to perform maintenance and upkeep on the planned "Gateway" lunar outpost between Earth and the moon.

An anonymous reader shares a report: The short version of this story is that skywatchers led by Bill Gray had been tracking an object for months that, based on their calculations, would soon impact the moon. It was obviously a piece of rocket trash (rockets produce a ton of trash), but no one stepped up to say "yes, that's ours, sorry about that." Based on their observations and discussions, these self-appointed (though by no means lacking in expertise) object trackers determined that it was likely a piece of a SpaceX launch vehicle from 2015. But SpaceX didn't cop to it, and after a while Gray and others, including NASA, decided it was more likely to be the 2014 Chang'e 5-T1 launch out of China. China denied this is the case, saying the launch vehicle in question burned up on reentry.

Maybe they're telling the truth; maybe they don't want to be responsible for the first completely inadvertent lunar impact in history. Other spacecraft have struck the moon, but it was on purpose or part of a botched landing (in other words, the impact was intentional, just a little harder than expected) -- not just a wayward piece of space junk. Perhaps we'll never know, and really, that's the weirdest part of all. With hundreds of terrestrial telescopes and radars, space-based sensor networks and cameras pointing every which way -- and that's just the space monitoring we know about! -- it seems amazing that a whole rocket stage managed to sit in orbit for six or seven years, eventually getting all the way to the moon, without being identified.

An anonymous reader quotes a report from The Register: Scientists at top universities in China propose sending a spacecraft powered by nuclear fission to orbit Neptune -- the outermost planet in our solar system -- in 2030. Astronomers have not yet been able to look at Uranus and Neptune in much detail. The best data collected so far comes from NASA's Voyager 2, the only spacecraft to have flown by the big blue orbs way back in 1986 and 1989. [...] The challenges involved are considerable. The outer solar system is cold, dark, and cruel. Spacecraft flying far from the Sun cannot rely on solar power, and need other sources of energy to maintain steady orbits and keep their instruments from freezing.

The Chinese authors envisioned a spacecraft with a mass up to 3,000 kilograms powered by a nuclear fission reactor at one end. It would also carry four smaller satellites -- two to study Neptune's atmosphere and another two to probe Triton, its largest moon, The Planetary Society first reported. Triton is an odd object -- it orbits in the opposite direction to its host planet, is geologically active, and may harbor liquid oceans beneath its icy crust. The best time to launch such a spacecraft would be 2030, the scientists reckoned. It could fly aboard China National Space Administration's Long March 5 rocket, and would reach Neptune a decade later after flying by the gas giants Jupiter and Saturn.

Martian rock samples collected by NASA's Curiosity Mars rover show signs of key ingredients for life as we know it on Earth. Space.com reports: The venerable Curiosity Rover drilled samples from Gale crater, the site of an ancient lake on Mars. Using these samples, scientists were able, for the first time, to measure the total amount of organic carbon in Martian rocks, according to a statement from NASA. Organic carbon, which is carbon bound to a hydrogen atom, is a prerequisite for organic molecules created and used by all known forms of life. However, organic carbon can also come from non-living sources, such as meteorites and volcanic eruptions. While previous studies have detected organic carbon in smaller quantities in Martian rock samples, the new measurements provide insight into the total amount of carbon in organic compounds.

"Total organic carbon is one of several measurements [or indices] that help us understand how much material is available as feedstock for prebiotic chemistry and potentially biology," Jennifer Stern, lead author of the study and a space scientist at NASA's Goddard Space Flight Center in Greenbelt, Maryland, said in the statement. "We found at least 200 to 273 parts per million of organic carbon. This is comparable to or even more than the amount found in rocks in very low-life places on Earth, such as parts of the Atacama Desert in South America, and more than has been detected in Mars meteorites."

[...] However, in addition to organic carbon, the researchers identified other signs suggesting Gale crater may have once supported life, including the presence of chemical energy sources, and chemical compounds such as oxygen, nitrogen and sulfur and low acidity. "Basically, this location would have offered a habitable environment for life, if it ever was present," Stern said in the statement. Their findings were published in the Proceedings of the National Academy of Sciences.

A small NASA-financed spacecraft launched from New Zealand on Tuesday, kicking off the space agency's plans to send astronauts back to the moon in a few years. From a report: The spacecraft, called CAPSTONE, is about the size of a microwave oven. It will study a specific orbit where NASA plans to build a small space station for astronauts to stop at before and after going to the moon's surface. At 9:55 p.m. local time (5:55 a.m. Eastern time), a 59-foot-tall rocket carrying CAPSTONE lifted off from a launchpad along the eastern coast of New Zealand. Although the mission is gathering information for NASA, it is owned and operated by a private company, Advanced Space, based in Westminster, Colo.

For a spacecraft headed to the moon, CAPSTONE is inexpensive, costing just under $30 million including the launch by Rocket Lab, a U.S.-New Zealand company. The first two stages of Electron rocket placed CAPSTONE into an elliptical orbit around Earth. For this mission, Rocket Lab essentially added a third stage that will methodically raise the altitude of the spacecraft over the next six days. At that point, CAPSTONE will head on its way to the moon, taking a slow but efficient path, arriving on Nov. 13.

"China's Mars sample return mission aims to collect samples from the Red Planet and deliver them to Earth in 2031, or two years ahead of a NASA and ESA joint mission," reports SpaceNews: Lifting off in late 2028... the complex, multi-launch mission will have simpler architecture in comparison with the joint NASA-ESA project, with a single Mars landing and no rovers sampling different sites. However, if successful, it would deliver to Earth the first collected Martian samples; an objective widely noted as one of the major scientific goals of space exploration....

The mission will build on the Mars entry, descent and landing technologies and techniques demonstrated by Tianwen-1 in May 2021, as well as the regolith sampling, automated lunar orbit rendezvous and docking, and high velocity atmospheric reentry success achieved by the 2020 Chang'e-5 lunar sample return mission.... Landing on Mars would take place around September 2029. Sampling techniques will include surface sampling, drilling and mobile intelligent sampling, potentially using a four-legged robot.

The ascent vehicle will consist of two stages, using either solid or liquid propulsion, and will be required to reach a speed of 4.5 kilometers per second, according to the presentation. After rendezvous and docking with the waiting orbiter, the spacecraft will depart Mars orbit in late October 2030 for a return to Earth in July 2031.

Sun Zezhou [chief designer of the Tianwen-1 Mars orbiter and rover mission], added that the Tianwen-1 orbiter will conduct an aerobraking test in Mars orbit later this year as part of the sample return mission preparation.
Thanks to Slashdot reader Hmmmmmm for sharing the story!

The grave of a rocket body that slammed into the moon more than three months ago has been found. Space.com reports: Early this year, astronomers determined that a mysterious rocket body was on course to crash into the lunar surface on March 4. Their calculations suggested that the impact would occur inside Hertzsprung Crater, a 354-mile-wide (570 kilometers) feature on the far side of the moon. Their math was on the money, it turns out. Researchers with NASA's Lunar Reconnaissance Orbiter (LRO) mission announced last night (June 23) that the spacecraft had spotted a new crater in Hertzsprung -- almost certainly the resting place of the rogue rocket.

Actually, LRO imagery shows that the impact created two craters, an eastern one about 59 feet (18 meters) wide superimposed over a western one roughly 52 feet (16 m) across. "The double crater was unexpected and may indicate that the rocket body had large masses at each end," Mark Robinson of Arizona State University, the principal investigator of the Lunar Reconnaissance Orbiter Camera (LROC), wrote in an update last night. "Typically a spent rocket has mass concentrated at the motor end; the rest of the rocket stage mainly consists of an empty fuel tank," he added. "Since the origin of the rocket body remains uncertain, the double nature of the crater may help to indicate its identity."

As Robinson noted, the moon-crashing rocket remains mysterious. Early speculation held that it was likely the upper stage of the SpaceX Falcon 9 rocket that launched the Deep Space Climate Observatory (DSCOVR) mission for NASA and the U.S. National Oceanic and Atmospheric Administration in February 2015. But further observations and calculations changed that thinking, leading many scientists to conclude that the rocket body was probably part of the Long March 3 booster that launched China's Chang'e 5T1 mission around the moon in October 2014. China has denied that claim.

The fourth and most recent attempt at a full launch rehearsal of NASA's Space Launch System went reasonably well, and despite some lingering issues and uncertainties, the agency is sending the rocket back to the hangar for final preparations in advance of its first flight. That inaugural launch will represent Artemis 1, the first mission in NASA's Artemis lunar program. Gizmodo reports: In a press release today, NASA -- to my surprise -- said it is done testing SLS after reviewing data from the recent launch rehearsal. That another full-blown rehearsal would be required seemed likely to me on account of an unresolved hydrogen leak linked to a faulty quick-connect fitting, which subsequently prevented ground teams from practicing the fully scheduled launch countdown on Monday. The goal was to reach T-10 seconds, but the launch controllers decided to quit the rehearsal at T-29 seconds for safety reasons. "NASA plans to return SLS and Orion to the pad for launch in late August," says the release. "NASA will set a specific target launch date after replacing hardware associated with the leak."

Despite the hydrogen leak and the incomplete countdown, Monday's wet dress did appear to go well. The ground teams finally managed to fully load SLS with propellants. Upwards of 755,000 gallons of cryogenic liquid oxygen and liquid hydrogen were supplied to the rocket's two stages, which the teams had failed to do during the first three attempts. What's more, all of the issues experienced during the first three wet dress rehearsals appear to have been resolved. The Orion spacecraft, currently sitting atop the rocket, also performed well during the test. Said Tom Whitmeyer, NASA's exploration systems manager, during a media teleconference on Tuesday: "We think that we had a really successful rehearsal," adding that there is "relative risk" is running a fifth wet dress, with the 322-foot-tall (98-meter) rocket standing fully exposed on the launch pad.

NASA announced on Tuesday that it's contracting three suppliers to provide concept designs for nuclear fission energy systems designed for use on the moon. TechCrunch reports: The winning bids for this award came from Lockheed Martin, Westinghouse and IX (a joint venture from Intuitive Machines and X-Energy). Each will be working with a few partners to develop their systems, which will be "initial concepts" only for the purposes of satisfying this particular contract, and each will receive roughly $5 million for their work, expected to take around 12 months.

NASA is aptly partnering with the Department of Energy (DOE) on this project, and the specs include a 40-kilowatt power generation capability, capable of generating that for at least a decade. That's about what a full charge on a current entry-level Nissan Leaf contains -- but as a fission generator it would obviously provide that continuously. It may not seem like much, but deployed singularly or in groups to support a lunar base, it could solve a lot of the challenges of the kind of prolonged occupancy of the moon that NASA plans to eventually establish through its Artemis program, which seeks to return humans to our largest natural satellite for ongoing science missions. NASA also notes that the work done for this contract could have other future applications for propulsion systems for long-range spacecraft for deep space explorations.

Nasa has begun turning off the spacecraft Voyager's systems, signaling the beginning of the end of the probe's 50-year career. The Independent reports: Voyager 1 and Voyager 2 -- two identical probes -- were launched in 1977 and travelled across interstellar space to the edge of the solar system, giving humanity its closest look at the moons of Jupiter and Saturn. Now, however, Nasa must start limiting the Voyagers' processes in order to keep them operating until 2030. "We're at 44 and a half years," says Ralph McNutt, a physicist at the Johns Hopkins University Applied Physics Laboratory, told Scientific American. "So we've done 10 times the warranty on the darn things."

The first Voyager craft has four remaining functioning instruments, while Voyager 2 has five, all of which are powered by converting decaying plutonium into electricity. This battery has had its output decreasing by approximately four watts every year, leading to Nasa making some tough choices about what to disable; in 2019, engineers had to turn off the heater for the cosmic-ray detector, a key piece of equipment for detecting when Voyager 2 exited the heliosphere- the magnetosphere, astrosphere and outermost atmospheric layer of the Sun.

The final instruments Nasa will disable are likely to be the magnetometer and the plasma science instrument, which are contained in the body of the spacecraft. These are warmed by the excess heat of the computers, while the others are suspended on a 13 meter fiberglass boom, meaning that they are likely to take the longest to get cold. Both craft remain so far from Earth that it takes a radio signal almost 22 hours to reach Voyager 1 and just over 18 for Voyager 2 -- even when traveling at the speed of light.

Jupiter's innards are full of the remains of baby planets that the gas giant gobbled up as it expanded to become the behemoth we see today, scientists have found. The findings come from the first clear view of the chemistry beneath the planet's cloudy outer atmosphere. Space.com reports: In the new study, researchers were finally able to peer past Jupiter's obscuring cloud cover using gravitational data collected by NASA's Juno space probe. This data enabled the team to map out the rocky material at the core of the giant planet, which revealed a surprisingly high abundance of heavy elements. The chemical make-up suggests Jupiter devoured baby planets, or planetesimals, to fuel its expansive growth. [...] [T]he researchers built computer models of Jupiter's innards by combining data, which was predominantly collected by Juno, as well as some data from its predecessor Galileo. The probes measured the planet's gravitational field at different points around its orbit. The data showed that rocky material accreted by Jupiter has a high concentration of heavy elements, which form dense solids and, therefore, have a stronger gravitational effect than the gaseous atmosphere. This data enabled the team to map out slight variations in the planet's gravity, which helped them to see where the rocky material is located within the planet. The researcher's models revealed that there is an equivalent of between 11 and 30 Earth masses of heavy elements within Jupiter (3% to 9% of Jupiter's mass), which is much more than expected.

The new models point to a planetesimal-gobbling origin for Jupiter because the pebble-accretion theory cannot explain such a high concentration of heavy elements. If Jupiter had initially formed from pebbles, the eventual onset of the gas accretion process, once the planet was large enough, would have immediately ended the rocky accretion stage. This is because the growing layer of gas would have created a pressure barrier that stopped additional pebbles from being pulled inside the planet. This curtailed rocky accretion phase would likely have given Jupiter a greatly reduced heavy metal abundance, or metallicity, than what the researchers calculated. However, planetesimals could have glommed onto Jupiter's core even after the gas accretion phase had begun; that's because the gravitational pull on the rocks would have been greater than the pressure exerted by the gas. This simultaneous accretion of rocky material and gas proposed by the planetesimal theory is the only explanation for the high levels of heavy elements within Jupiter, the researchers said.

The study also revealed another interesting finding: Jupiter's insides do not mix well into its upper atmosphere, which goes against what scientists had previously expected. The new model of Jupiter's insides shows that the heavy elements the planet has absorbed have remained largely close to its core and the lower atmosphere. Researchers had assumed that convection mixed up Jupiter's atmosphere, so that hotter gas near the planet's core would rise to the outer atmosphere before cooling and falling back down; if this were the case, the heavy elements would be more evenly mixed throughout the atmosphere. However, it is possible that certain regions of Jupiter may have a small convection effect, and more research is needed to determine exactly what is going on inside the gas giant's atmosphere. The researchers' findings could also change the origin stories for other planets in the solar system. The study was published in the journal Astronomy and Astrophysics.

There are no environmental showstoppers in SpaceX's plans to launch a giant new rocket to orbit from South Texas, the Federal Aviation Administration said on Monday. From a report: An environmental assessment by the agency has concluded that SpaceX's plans for orbital launches will have "no significant impact" on the region along the Gulf Coast near Brownsville, Texas. But the F.A.A. is also requiring the company to undertake more than 75 actions to minimize the impact on the surrounding areas as it begins flights of Starship, a vehicle that is central to NASA's plans to return to the moon as well as the vision of Elon Musk, the company's founder and chief executive, to colonize Mars. The actions Mr. Musk's company must take include earlier notice of launches, monitoring of vegetation and wildlife by a biologist, coordination with state and federal agencies to remove launch debris from sensitive habitats and adjustment of lighting to lessen impact on wildlife and a nearby beach. The mitigation measures required by the F.A.A. also restrict closures of a highway that passes the SpaceX site during launches so that people can visit the nearby beach, park and wildlife refuge. The agency said the highway could not be closed on 18 holidays and not on more than five weekends a year.

"All appeared to be going smoothly," reports CBS News, "when, about a minute before the second stage engine was expected to shut down, an onboard 'rocketcam' showed a flash in the engine's exhaust plume.

"The camera view them showed what appeared to be a tumble before video from the rocket cut off...." California-based Astra on Sunday launched two shoebox-size NASA satellites from Cape Canaveral in a modest mission to improve hurricane forecasts, but the second stage of the company's low-cost booster malfunctioned before reaching orbit and the payloads were lost.

"The upper stage shut down early and we did not deliver the payloads to orbit," Astra tweeted. "We have shared our regrets with @NASA and the payload team. More information will be provided after we complete a full data analysis."

It was the seventh launch of Astra's small "Venture-class" rocket and the company's fifth failure. Sunday's launch was the first of three planned for NASA to launch six small CubeSats, two at a time, into three orbital planes. Given the somewhat risky nature of relying on tiny shoebox-size CubeSats and a rocket with a very short track record, the $40 million project requires just four satellites and two successful launches to meet mission objectives. The NASA contract calls for the final two flights by the end of July. Whether Astra can meet that schedule given Sunday's failure is not yet known.

"Although today's launch with @Astra did not go as planned, the mission offered a great opportunity for new science and launch capabilities," tweeted NASA science chief Thomas Zurbuchen.... After Sunday's failure, he tweeted: "Even though we are disappointed right now, we know: There is value in taking risks in our overall NASA Science portfolio because innovation is required for us to lead."

"If, as astronomers believe, the death of large stars leave behind black holes, there should be hundreds of millions of them scattered throughout the Milky Way galaxy," notes an announcement from the University of California at Berkeley. "The problem is, isolated black holes are invisible.

"Now, a team led by University of California, Berkeley, astronomers has for the first time discovered what may be a free-floating black hole by observing the brightening of a more distant star as its light was distorted by the object's strong gravitational field — so-called gravitational microlensing." The team, led by graduate student Casey Lam and Jessica Lu, a UC Berkeley associate professor of astronomy, estimates that the mass of the invisible compact object is between 1.6 and 4.4 times that of the sun. Because astronomers think that the leftover remnant of a dead star must be heavier than 2.2 solar masses in order to collapse to a black hole, the UC Berkeley researchers caution that the object could be a neutron star instead of a black hole. Neutron stars are also dense, highly compact objects, but their gravity is balanced by internal neutron pressure, which prevents further collapse to a black hole.

Whether a black hole or a neutron star, the object is the first dark stellar remnant — a stellar "ghost" — discovered wandering through the galaxy unpaired with another star.

"This is the first free-floating black hole or neutron star discovered with gravitational microlensing," Lu said. "With microlensing, we're able to probe these lonely, compact objects and weigh them. I think we have opened a new window onto these dark objects, which can't be seen any other way...." The analysis by Lam, Lu and their international team has been accepted for publication in The Astrophysical Journal Letters. The analysis includes four other microlensing events that the team concluded were not caused by a black hole, though two were likely caused by a white dwarf or a neutron star.

The team also concluded that the likely population of black holes in the galaxy is 200 million — about what most theorists predicted.

Notably, a competing team from the Space Telescope Science Institute (STScI) in Baltimore analyzed the same microlensing event and claims that the mass of the compact object is closer to 7.1 solar masses and indisputably a black hole. A paper describing the analysis by the STScI team, led by Kailash Sahu, has been accepted for publication in The Astrophysical Journal....

The astrometric data came from NASA's Hubble Space Telescope.... While surveys like these discover about 2,000 stars brightened by microlensing each year in the Milky Way galaxy, the addition of astrometric data is what allowed the two teams to determine the mass of the compact object and its distance from Earth.

Four months ago, NASA's Mars rover Perseverance picked up a "pet rock," tucked inside its left front wheel, that's been riding along ever since. Space.com reports: So far, its ridden across 5.3 miles (8.5 kilometers) with the Perseverance rover as it drives across its Jezero Crater home on Mars.

Perseverance has carried the rock north across its landing site, named for the famed late science fiction author Octavia E. Butler, and then west across a region called "Kodiak," the remains of a former delta at Jezero. The rover is currently in the midst of what NASA calls its Delta Front Campaign and may have drilled into its first sedimentary Mars rock, Ravanis wrote.

"Perseverance's pet rock is now a long way from home," Ravanis wrote. "It's possible that the rock may fall out at some point along our future ascent of the crater rim. If it does so, it will land amongst rocks that we expect to be very different from itself."

If that happens, a future Martian geologist might be a bit confused to find the rock so out of place, Ravanis added.