A team of researchers has detected a trio of near-Earth asteroids in the inner solar system, one of which is the largest found since 2014 that poses a potential risk to the planet. The asteroids remained undetected until now because they occupy a region of the sky hidden by the Sun's glare. Gizmodo reports: Near-Earth Asteroids (NEAs) and Potentially Hazardous Asteroids (PHAs) are two types of near-Earth objects that space agencies like to keep track of. Despite the scary-sounding names, none of them pose any imminent threat to us. Currently, there are 1,454 NEAs that have a non-zero probability of impacting Earth in the next 100 years. You can find a complete list of NEOs at NASA's Center for Near Earth Object Studies.

The three near-Earth asteroids were found using the Dark Energy Camera in Chile. The camera took deep-field images close to Earth's horizon during twilight, to combat the Sun's glare and atmospheric distortions. The team's results are published in The Astronomical Journal. Two of the recently observed asteroids have orbits that safely skirt Earth, but one of the rocks -- a 0.93-mile-wide (1.5-kilometer) asteroid dubbed 2022 AP7 -- has an orbit that may eventually put it on a collision course with Earth. To be perfectly clear: The asteroid is not currently barreling toward Earth, but its path could bring it close enough one day that NASA will want to keep tabs on it.

"NASA's Earth Surface Mineral Dust Source Investigation (EMIT) mission is mapping the prevalence of key minerals in the planet's dust-producing deserts — information that will advance our understanding of airborne dust's effects on climate," NASA announced this week.

"But EMIT has demonstrated another crucial capability: detecting the presence of methane, a potent greenhouse gas." In the data EMIT has collected since being installed on the International Space Station in July, the science team has identified more than 50 "super-emitters" in Central Asia, the Middle East, and the Southwestern United States. Super-emitters are facilities, equipment, and other infrastructure, typically in the fossil-fuel, waste, or agriculture sectors, that emit methane at high rates. "Reining in methane emissions is key to limiting global warming. This exciting new development will not only help researchers better pinpoint where methane leaks are coming from, but also provide insight on how they can be addressed — quickly," said NASA Administrator Bill Nelson.

"The International Space Station and NASA's more than two dozen satellites and instruments in space have long been invaluable in determining changes to the Earth's climate. EMIT is proving to be a critical tool in our toolbox to measure this potent greenhouse gas — and stop it at the source...."

"These results are exceptional, and they demonstrate the value of pairing global-scale perspective with the resolution required to identify methane point sources, down to the facility scale," said David Thompson, EMIT's instrument scientist and a senior research scientist at NASA's Jet Propulsion Laboratory in Southern California, which manages the mission. "It's a unique capability that will raise the bar on efforts to attribute methane sources and mitigate emissions from human activities."

Relative to carbon dioxide, methane makes up a fraction of human-caused greenhouse-gas emissions, but it's estimated to be 80 times more effective, ton for ton, at trapping heat in the atmosphere in the 20 years after release. Moreover, where carbon dioxide lingers for centuries, methane persists for about a decade, meaning that if emissions are reduced, the atmosphere will respond in a similar timeframe, leading to slower near-term warming.... "Some of the plumes EMIT detected are among the largest ever seen — unlike anything that has ever been observed from space," said Andrew Thorpe, a research technologist at JPL leading the EMIT methane effort. "What we've found in a just a short time already exceeds our expectations."

For example, the instrument detected a plume about 2 miles (3.3 kilometers) long southeast of Carlsbad, New Mexico, in the Permian Basin. One of the largest oilfields in the world, the Permian spans parts of southeastern New Mexico and western Texas. In Turkmenistan, EMIT identified 12 plumes from oil and gas infrastructure east of the Caspian Sea port city of Hazar. Blowing to the west, some plumes stretch more than 20 miles (32 kilometers).... With wide, repeated coverage from its vantage point on the space station, EMIT will potentially find hundreds of super-emitters — some of them previously spotted through air-, space-, or ground-based measurement, and others that were unknown.

"As it continues to survey the planet, EMIT will observe places in which no one thought to look for greenhouse-gas emitters before, and it will find plumes that no one expects," said Robert Green, EMIT's principal investigator at JPL.

The mission of NASA's robotic lander InSight "is nearing an end as dust obscures its solar panels," reports CNN. "In a matter of weeks, the lander won't be able to send a beep to show it's OK anymore."

"Before it bids farewell, though, the spacecraft still has some surprises in store." When Mars rumbled beneath InSight's feet on December 24, NASA scientists thought it was just another marsquake. The magnitude 4 quake was actually caused by a space rock slamming into the Martian surface a couple thousand miles away. The meteoroid left quite a crater on the red planet, and it revealed glimmering chunks of ice in an entirely unexpected place — near the warm Martian equator.
The chunks of ice — the size of boulders — "were found buried closer to the warm Martian equator than any ice that has ever been detected on the planet," CNN explained earlier this week. The article also adds that ice below the surface of Mars "could be used for drinking water, rocket propellant and even growing crops and plants by future astronauts. And the fact that the ice was found so near the equator, the warmest region on Mars, might make it an ideal place to land crewed missions to the red planet." Interestingly, they note that scientists only realized it was a meteoroid strike (and not an earthquake) when "Before and after photos captured from above by the Mars Reconnaissance Orbiter, which has been circling Mars since 2006, spotted a new crater this past February." A crater that was 492 feet (150 meters) across and 70 feet (21 meters) deep... When scientists connected the dots from both missions, they realized it was one of the largest meteoroid strikes on Mars since NASA began studying the red planet.... The journal Science published two new studies describing the impact and its effects on Thursday....

"The image of the impact was unlike any I had seen before, with the massive crater, the exposed ice, and the dramatic blast zone preserved in the Martian dust," said Liliya Posiolova, orbital science operations lead for the orbiter at Malin Space Science Systems in San Diego, in a statement....

Researchers estimated the meteoroid, the name for a space rock before it hits the ground, was about 16 to 39 feet (5 to 12 meters). While this would have been small enough to burn up in Earth's atmosphere, the same can't be said for Mars, which has a thin atmosphere only 1% as dense as Earth's.... Some of the material blasted out of the crater landed as far as 23 miles (37 kilometers) away.

Teams at NASA also captured sound from the impact, so you can listen to what it sounds like when a space rock hits Mars. The images captured by the orbiter, along with seismic data recorded by InSight, make the impact one of the largest craters in our solar system ever observed as it was created.

NASA obligated $2.04 billion to SpaceX in fiscal year 2022, which ended last month, according to new federal procurement data. For the first time, the amount paid by the space agency to SpaceX exceeds that paid to Boeing, which has long been the leading hardware provider to NASA. Boeing received $1.72 billion during the most recent fiscal year, based on data first reported by Aviation Week's Irene Klotz. Ars Technica reports: The California Institute of Technology, which manages the Jet Propulsion Laboratory field center for NASA, remains the agency's No. 1 contractor, with $2.68 billion in funding. The academic institution is responsible for operating the California-based NASA field center and distributing funding for myriad robotic spacecraft missions such as Mars Perseverance and the Europa Clipper. On the one hand, the ascension of SpaceX to the No. 2 spot on NASA's contractor list represents a major shakeup in the order of things. For a long time, NASA's human spaceflight and exploration programs were dominated by Boeing, Lockheed Martin, Aerojet, Northrop Grumman, and a handful of other traditional defense aerospace contractors.

However, it should come as no surprise that a company that has recently delivered the most services -- and, arguably, value -- to NASA should start to receive a large share of its contract awards. This has been most notable with SpaceX's performance on Commercial Crew, NASA's program to buy transportation services from private companies to bring its astronauts to and from the International Space Station. NASA awarded contracts to Boeing and SpaceX in 2014 to develop their spacecraft, paying Boeing about 60 percent more. At the time, it was widely believed that the traditional contractor, with this additional money, would deliver services sooner. But it was SpaceX that first flew crew to the space station in May 2020, and the company has since launched five operational missions to the orbiting laboratory. [...] Much of the funding increase for SpaceX in 2022, an increase of about $400 million over the previous year, appears to be driven by contracts for the Human Landing System as part of the Artemis Moon Program and the purchase of additional Crew Dragon missions to the space station. (Individual contracts can be found within the Federal Procurement Data System).

Longtime Slashdot reader Tablizer shares a report from CNN: The hunt for planets that could harbor life may have just narrowed dramatically. Scientists had long hoped and theorized that the most common type of star in our universe -- called an M dwarf -- could host nearby planets with atmospheres, potentially rich with carbon and perfect for the creation of life. But in a new study of a world orbiting an M dwarf 66 light-years from Earth, researchers found no indication such a planet could hold onto an atmosphere at all. Without a carbon-rich atmosphere, it's unlikely a planet would be hospitable to living things. Carbon molecules are, after all, considered the building blocks of life. And the findings don't bode well for other types of planets orbiting M dwarfs, said study coauthor Michelle Hill, a planetary scientist and a doctoral candidate at the University of California, Riverside.

"The pressure from the star's radiation is immense, enough to blow a planet's atmosphere away," Hill said in a post on the university's website. M dwarf stars are known to be volatile, sputtering out solar flares and raining radiation on nearby celestial bodies. But for years, the hope had been that fairly large planets orbiting near M dwarfs could be in a Goldilocks environment, close enough to their small star to keep warm and large enough to cling onto its atmosphere. The nearby M dwarf, however, could be too intense to keep the atmosphere intact, according to the new study, which was published in The Astrophysical Journal Letters.

A similar phenomenon happens in our solar system: Earth's atmosphere also deteriorates because of outbursts from its nearby star, the sun. The difference is that Earth has enough volcanic activity and other gas-emitting activity to replace the atmospheric loss and make it barely detectable, according to the research. However, the M dwarf planet examined in the study, GJ 1252b, "could have 700 times more carbon than Earth has, and it still wouldn't have an atmosphere. It would build up initially, but then taper off and erode away," said study coauthor and UC Riverside astrophysicist Stephen Kane, in a news release.

NASA's independent study to delve into the mysteries surrounding unidentified aerial phenomena kicked off today. CNN reports: The group will include experts across numerous disciplines -- including astrobiology, data science, oceanography, genetics, policy and planetary science -- as well as retired NASA astronaut Scott Kelly, a former fighter pilot and test pilot and retired US Navy captain. The space agency, which first announced it was forming the group in June, previously revealed that the team would be led by astrophysicist David Spergel, who is president of the Simons Foundation in New York City.

The new group won't necessarily seek to determine exactly what the UAPs, which have been seen moving through restricted military airspace over the past several decades, are. Rather, the team will look to hash out exactly how it's best for NASA to approach further study of the phenomenon. The space agency has already noted that the limited number of observations of UAPs has made it difficult to draw scientific conclusions about the nature of such events. "Without access to an extensive set of data, it is nearly impossible to verify or explain any observation, thus the focus of the study is to inform NASA what possible data could be collected in the future to scientifically discern the nature of UAP," according to a NASA news release.

This study, expected to last about nine months, will also be entirely unclassified and within the public domain. "Exploring the unknown in space and the atmosphere is at the heart of who we are at NASA," Zurbuchen said in a Friday statement. "Understanding the data we have surrounding unidentified aerial phenomena is critical to helping us draw scientific conclusions about what is happening in our skies. Data is the language of scientists and makes the unexplainable, explainable." Specifically, the team will look for data on "events in the sky that cannot be identified as aircraft or known natural phenomena -- from a scientific perspective," the agency said. Unidentified aerial phenomena are of interest, NASA said, from a security and safety perspective. There was no evidence UAPs are extraterrestrial in origin, NASA emphasized during the initial announcement in June.

NASA's James Webb Space Telescope has captured a lush, highly detailed landscape -- the iconic Pillars of Creation -- where new stars are forming within dense clouds of gas and dust. From NASA: The three-dimensional pillars look like majestic rock formations, but are far more permeable. These columns are made up of cool interstellar gas and dust that appear -- at times -- semi-transparent in near-infrared light. Webb's new view of the Pillars of Creation, which were first made famous when imaged by NASA's Hubble Space Telescope in 1995, will help researchers revamp their models of star formation by identifying far more precise counts of newly formed stars, along with the quantities of gas and dust in the region. Over time, they will begin to build a clearer understanding of how stars form and burst out of these dusty clouds over millions of years.

Newly formed stars are the scene-stealers in this image from Webb's Near-Infrared Camera (NIRCam). These are the bright red orbs that typically have diffraction spikes and lie outside one of the dusty pillars. When knots with sufficient mass form within the pillars of gas and dust, they begin to collapse under their own gravity, slowly heat up, and eventually form new stars. What about those wavy lines that look like lava at the edges of some pillars? These are ejections from stars that are still forming within the gas and dust. Young stars periodically shoot out supersonic jets that collide with clouds of material, like these thick pillars. This sometimes also results in bow shocks, which can form wavy patterns like a boat does as it moves through water. The crimson glow comes from the energetic hydrogen molecules that result from jets and shocks. This is evident in the second and third pillars from the top -- the NIRCam image is practically pulsing with their activity. These young stars are estimated to be only a few hundred thousand years old.

Although it may appear that near-infrared light has allowed Webb to "pierce through" the clouds to reveal great cosmic distances beyond the pillars, there are no galaxies in this view. Instead, a mix of translucent gas and dust known as the interstellar medium in the densest part of our Milky Way galaxy's disk blocks our view of the deeper universe. This scene was first imaged by Hubble in 1995 and revisited in 2014, but many other observatories have also stared deeply at this region. Each advanced instrument offers researchers new details about this region, which is practically overflowing with stars. This tightly cropped image is set within the vast Eagle Nebula, which lies 6,500 light-years away.

After 170 days in space, four astronauts splashed down in the Atlantic Ocean on Friday, bringing an end to a successful NASA-SpaceX mission to the International Space Station. From a report: Following two days of weather delays, SpaceX's Crew Dragon Freedom returned to Earth off the coast of Jacksonville, Florida, beneath clear blue skies and into mild seas. The spacecraft's descent through Earth's atmosphere appeared to be nominal, with two drogue parachutes deploying on schedule, followed by four clean main parachutes, allowing Dragon to splash down at about 25 km per hour. "SpaceX, from Freedom, thank you for an incredible ride up to orbit and an incredible ride home," Kjell Lindgren, the NASA commander of the spacecraft, said after landing.

Lindgren led a mission that included NASA astronauts Bob Hines and Jessica Watkins, as well as European Space Agency astronaut Samantha Cristoforetti. Upon landing, the spacecraft was met by two SpaceX "fast boats" that secured the toasty-looking vehicle before it was brought on board the Megan recovery ship, named after Megan McArthur, an astronaut aboard an earlier SpaceX flight. This mission, Crew-4, was the fourth operational mission flown by SpaceX for NASA. Earlier this month, the Crew-5 mission launched four astronauts to the space station, where they will remain for about six months. Including an initial demonstration mission in 2020, and two private spaceflights -- Inspiration4 and Axiom-1 -- Crew Dragon has now carried 30 people into orbit.

In a little more than two years, SpaceX has surpassed the total number of astronauts launched into orbit by China, whose human spaceflight program dates back to 2003; and in the time Crew Dragon has been operational, it has exceeded even the Russian Soyuz vehicle in terms of the total number of people flown into space during that period. Over the last two years Dragon had a few flaws, including an intermittently problematic toilet and a lagging parachute on one flight, but NASA officials have been extremely pleased with the vehicle's performance. It has safely returned the United States' capability of human spaceflight, which had been lost since the space shuttle's retirement. Had Dragon not been available, NASA would have been in the uncomfortable position of relying on Russia for crew transport amid the Ukraine war.

SpaceX returned its fourth operational crew mission from the International Space Station on Friday, with the quartet of astronauts splashing down in the company's capsule off the coast of Florida. CNBC reports: The company's Crew Dragon spacecraft "Freedom" undocked from the ISS at around noon ET to begin the trip back to Earth, with splashdown happening around 5 p.m. ET. "Welcome home -- thanks for flying SpaceX," the company's mission control told the crew shortly after landing. "Thank you for an incredible ride to orbit, and an incredible ride home," Crew-4 commander Kjell Lindgren said in response.

Crew-4 includes NASA astronauts Lindgren, Bob Hines, and Jessica Watkins, as well as European Space Agency astronaut Samantha Cristoforetti. The mission launched in April for a six-month stay on the orbiting research laboratory. Elon Musk's company launched the Crew-5 mission last week, bringing four other astronauts to the ISS. SpaceX has now flown 30 people to orbit since its first crewed launch in May 2020, with six government missions and two private ones.

Entrepreneur Dennis Tito and his wife, Akiko Tito, announced Wednesday that they purchased two tickets on the second of SpaceX's planned circumlunar flights later this decade. Dennis Tito made history when he became the first person to pay for his own ride into space more than two decades ago. He flew aboard a Soyuz vehicle and spent a week on the International Space Station. As for his wife, Akiko Tito, she becomes the first woman confirmed to fly on Starship, notes Ars Technica. From the report: The flight will last about a week, outbound to the Moon, passing within about 40 km of the surface and flying back. Ten other seats on Starship remain unsold and are available. Tito said he was not at liberty to disclose the price he paid. This brings the manifest of private human spaceflights on Starship, and its Super Heavy rocket, to three. There is billionaire Jared Isaacman's Polaris III mission, likely to low Earth orbit, which will be followed by Japanese billionaire Yusaku Maezawa's "dearMoon" flight, the first human Starship flight around the Moon. Then comes Tito and the second circumlunar mission.

SpaceX has also contracted with NASA to fly the first human landing on the Moon as part of the Artemis program, but for now, NASA astronauts will launch on a separate rocket and rendezvous with Starship in lunar orbit to go down to the lunar surface and back to orbit. So far, NASA hasn't announced plans to launch astronauts from Earth on Starship or land them back here. The timeline for all of these missions hinges on the development of the Starship vehicle, which may make a debut orbital test flight in the coming months from South Texas. After that, the large, fully reusable launch system will fly dozens of uncrewed missions, mostly carrying Starlink payloads, before humans climb on board. This is because Starship will make a propulsive landing back on Earth -- something no crew vehicle has ever done -- and has no backup should there be some sort of landing failure.

An anonymous reader quotes a report from the Guardian: A spacecraft that plowed into a small, harmless asteroid millions of miles from Earth succeeded in shifting the orbit of the space rock, Nasa said on Tuesday, announcing the results of its first such test. The US space agency strategically launched the Double Asteroid Redirection Test ("Dart") spacecraft into the path of the asteroid, thereby throwing it off course. Nasa hopes to be able to deflect any asteroid or comet that comes to pose a real threat to Earth.

Dart altered the orbit of the Dimorphos asteroid by 32 minutes. Glaze said the minimum requirement for changing the orbital period was "really only 73 seconds." Last year, in a test that cost $325 million, another Dart spacecraft, roughly the size of a vending machine, was destroyed when it slammed into an asteroid 7m miles away, at 14,000mph.In a tweet, the vice-president, Kamala Harris, said: "Congratulations to the team at Nasa for successfully altering the orbit of an asteroid. The Dart mission marks the first time humans have changed the motion of a celestial body in space, demonstrating technology that could one day be used to protect Earth."

The scientist and educator Bill Nye said: "We're celebrating ... because a mission like this could save the world."

The Nasa administrator, the former astronaut and Democratic Florida senator Bill Nelson, said: "We showed the world that Nasa is serious as a defender of this planet."

Lori Glaze, director of Nasa's planetary division, said: "Let's all just take a moment to soak this in. We're all here this afternoon because for the first time ever, humanity has changed the orbit of a planetary body."

Andy Lapsa and Tom Feldman, former Blue Origin engineers and the founders of Stoke Space, are working to develop the first fully recyclable space rocket -- one that features a reusable first and second stage. Here's an excerpt from Ars Technica's exclusive report, written by Eric Berger: In the 20 months since its initial seed round of funding, Stoke has built a second-stage engine, a prototype for the second stage, turbopumps, and manufacturing facilities. It also increased its headcount to 72 people and finalized the overall design for the rocket, which has a lift capacity of 1.65 metric tons to low-Earth orbit, in fully reusable mode. Last month, the company started to test-fire its upper-stage engines at a facility in Moses Lake, Washington. The images and video show an intriguing-looking ring with 15 discrete thrusters firing for several seconds. The circular structure is 13 feet in diameter, and this novel-looking design is Stoke's answer to one of the biggest challenges of getting a second stage back from orbit.

Most commonly, a traditional rocket has an upper stage with a single engine. This second-stage rocket engine has a larger nozzle -- often bell-shaped -- to optimize the flow of engine exhaust in a vacuum. Because all parts of a rocket are designed to be as light as possible, such extended nozzles are often fairly fragile because they're only exposed above Earth's atmosphere. So one problem with getting an upper stage back from Earth, especially if you want to use the engine to control and slow its descent, is protecting this large nozzle. One way to do that is to bury the engine nozzle in a large heat shield, but that would require more structure and mass, and it may not be dynamically stable. Stoke's answer was using a ring of 30 smaller thrusters. (The tests last month only employed 15 of the 30 thrusters). In a vacuum, the plumes from these nozzles are designed to merge and act as one. And during reentry, with a smaller number of smaller thrusters firing, it's easier to protect the nozzles. "What you're seeing in the photos of the test is a high-performance upper-stage engine that can operate within atmosphere at deep throttle to support vertical landing but then also perform at a higher ISP than some variants of the RL 10 engine in space," Lapsa said.

Another significant second-stage problem is protecting the whole vehicle from the super-heated atmosphere during reentry. NASA's Space Shuttle accomplished this with brittle thermal tiles, but these required 30,000 employee hours to inspect, test, and refurbish between flights. SpaceX is using a different type of ceramic tile, designed to be more reusable, for Starship. Given Stoke's background in rocket engines, Lapsa said it made the most sense to try a regeneratively cooled heat shield. The vehicle's ductile metallic outer layer will be lined with small cavities to flow propellant through the material to keep it cool during reentry. The second stage, therefore, will return to Earth somewhat like a space capsule -- base first, with the regeneratively cooled heat shield.

Stoke Space has a very long road ahead of it to reach space. Engine tests are an important step, but they're only the first step of many. Next up for the company is "hop" tests with a full-scale version of the second stage at the Moses Lake facility in central Washington. This prototype won't have a fairing as it would during launch, but it will still stand 19 feet tall. Initially, the tests will be low-altitude, probably measured in hundreds of feet. If there's an engineering need to go higher, the company will consider that, Lapsa said. But for now, the goal is to prove the capability to control the rocket during ascent and descent and make a soft landing. This is a shockingly difficult guidance, navigation, and control problem, especially with a novel system of distributed thrusters. "This is kind of a final proof point of this architecture," Lapsa said. "It is new. It's different. It's weird. It's original. There were a lot of questions that we had about how this thing is going to work. But we've already mitigated a lot of risk." If Stoke can manage to land the upper stage, it can move ahead with the first stage and start to turn the yet-unnamed rocket into an orbital vehicle. It sounds easy, but it's not...

Ars Technica's Eric Berger writes: Four days before Thanksgiving in 2002, space shuttle Endeavour lifted off from Kennedy Space Center in Florida. Among the seven crew members to the International Space Station was one Russian cosmonaut, Nikolai M. Budarin, making his third spaceflight. By then, as part of warming relations between Russia and the United States, cosmonauts had been flying on board the space shuttle for nearly a decade. The exchange program would have continued, but tragedy struck on the shuttle's next mission, which launched in January 2003. Space Shuttle Columbia was lost upon reentry into Earth's atmosphere, killing all seven astronauts on board.

Following this disaster, no more Russians would fly on the space shuttle after it returned to service. Instead, NASA focused on flying the minimum number of missions needed to complete the construction of the International Space Station. After the shuttle's retirement in 2011, NASA would come to rely on Russia's Soyuz vehicle as its only ride to space. NASA regained the capacity to launch its own astronauts into space in 2020, after working with SpaceX to complete the development of the Crew Dragon vehicle. Following a successful demonstration flight in May 2020 with two astronauts on board, Crew Dragon safely launched six additional times, carrying an additional two dozen people into space.

On Wednesday, Crew Dragon carried astronauts into space for an eighth time, with the fifth operational mission for NASA. This Crew-5 flight was commanded by Nicole Mann, a NASA astronaut making her first flight into space. "Whooo, that was a smooth ride uphill!" she exclaimed upon reaching orbit. Among the four Dragon riders was a cosmonaut, Anna Kikina, also making her debut flight into space. She is just the sixth Russian or Soviet female cosmonaut in the history of the program since Valentina Tereshkova flew into orbit on June 16, 1963. Kikina is also the first Russian to launch into space from the United States since Budarin, two decades ago. In addition to Mann and Kikina, Crew-5 is rounded out by NASA astronaut Josh Cassada and Japanese astronaut Koichi Wakata. While the other three are rookies, this is Wakata's fifth spaceflight. During their stay aboard the International Space Station, the astronauts will conduct more than 200 science experiments and technology demonstrations, including studies on printing human organs in space.

NASA says the damage to their launch facilities in Florida following Hurricane Ian was minimal and work was already underway for a "rapid-fire succession of three launches in three days," reports Ars Technica. An anonymous reader shares an excerpt from the report: First up is a commercial mission on United Launch Alliance's Atlas V rocket to launch SES-20 and SES-21 satellites for Luxembourg-based satellite operator SES. Stacked in its '531' configuration, this Atlas rocket has a five-meter-diameter payload fairing, three solid rocket boosters, and one engine on the upper-stage Centaur. On Friday, United Launch Alliance said everything continues to progress toward the launch of this mission on Tuesday, October 4, from Space Launch Complex-41 at Cape Canaveral Space Force Station. The launch is planned for 5:36 pm EST (21:36 UTC). Weather is forecast to be favorable, with a 70 percent chance of favorable conditions for launch. After launching, the Atlas V rocket will deliver the pair of communications satellites into near-circular, near-geosynchronous orbits. Once separated, the satellites will use onboard propulsion systems to circularize their orbits at 35,900 km above the equator.

Next up in Florida is NASA's Crew-5 mission, which will launch on a Falcon 9 rocket to the International Space Station. NASA officials confirmed this mission remains on schedule for noon EST (16:00 UTC) on October 5 from Launch Complex-39A at Kennedy Space Center. The crew of four -- NASA astronauts Nicole Mann and Josh Cassada, Japan Aerospace Exploration Agency astronaut Koichi Wakata, and Roscosmos cosmonaut Anna Kikina -- have been holding at Johnson Space Center in Houston pending the outcome of Hurricane Ian. However, they will now fly to Florida on Saturday in preparation for the launch. SpaceX, meanwhile, will roll its Falcon 9 rocket with the Crew Dragon spacecraft to the launchpad on Friday night or Saturday, ahead of a static fire test on Sunday. There appear to be no significant technical issues to be worked on ahead of the launch next Wednesday.

Finally, on October 6, SpaceX plans an additional launch. For this mission, from Space Launch Complex-40 at Cape Canaveral, a Falcon 9 rocket will deliver Intelsat's Galaxy 33 and 34 satellites telecommunications satellites into a geostationary transfer orbit. The launch is set for 7:07 pm EST (23:07 UTC). Of note for this mission, this Falcon 9 first-stage booster will be making its 14th launch. This marks the first time a SpaceX rocket has flown a purely commercial payload on its 10th flight or later. This strongly suggests that the commercial satellite market is becoming increasingly comfortable with SpaceX's refurbishment process for even well-used rockets. Additionally, NASA said that its Artemis I hardware "survived Hurricane Ian just fine, safely tucked inside the large Vehicle Assembly Building at Kennedy Space Center," notes Ars. "The agency will aim to have the rocket ready for a launch attempt in about six weeks."

techmage writes: Early this morning, Firefly Aerospace succeeded in launching their Alpha rocket to Low Earth Orbit. This marks one of a handful of companies who have reached space with that few attempts (Virgin Orbit and RocketLab are just some of the others).

Shameless plug -- I had the pleasure of building the Serenity satellite, a 3U CubeSat that flew on the mission.

Check out the video of the launch and deployment. It is quite something to watch. All three payloads were successfully deployed. Space.com reports: One of them, called Serenity, comes from the nonprofit organization Teachers in Space. Serenity was designed to collect a variety of data during today's flight, which will be shared with the educational community, according to a Firefly mission description.

Also reaching orbit today was TechEdSat-15 (TES-15), which is owned by NASA in coordination with San Jose State University in California. TES-15 features an "exo-brake" designed to help satellites leave their orbital perches more smoothly when their work is done. "The exo-brake will deploy after the cubesat is ejected from its dispenser to deorbit the cubesat," Firefly wrote in the mission description. TES-15 also carries an experiment designed to optimize data transfer from the little spacecraft, the company added.

The third payload -- the PicoBus deployer, from the nonprofit Libre Space -- carries five tiny payloads of its own. Those bantam "picosats" include Genesis-L & Genesis-N, from AMSAT (Radio Amateur Satellite Corporation) Spain. The pair will demonstrate a pulsed-plasma thruster system for spacecraft propulsion and "build heritage for future missions," according to Firefly. PicoBus is also carrying Libre Space's Qubik-1 and Qubik-2, which will perform communications experiments, and FossaSat-1B. This latter satellite, from the Spanish company Fossa Systems, will test communications and remote-sensing tech. It also carries a low-resolution Earth-imaging camera.

An anonymous reader quotes a report from Wired: Over the past eight years, a modified Boeing 747 jetliner has flown hundreds of flights on a unique mission: carrying a 19-ton, 2.5-meter telescope known as Sofia, or the Stratospheric Observatory for Infrared Astronomy. Flying a telescope on a jumbo jet offered a way to peer into the heavens at wavelengths that could not be glimpsed from the ground -- but the ticket was expensive. So yesterday, NASA and the German space agency grounded the mission. Its final flight landed early Thursday morning at NASA's Armstrong Flight Research Center in the desert near Los Angeles.

Sofia was an innovative way to gaze at the infrared universe. Infrared light is essentially heat radiation -- but astronomers can't probe cosmic objects like dust-enshrouded stars and galaxies without the water vapor in Earth's atmosphere absorbing that light. That confounds attempts to observe those objects with telescopes built on mountaintops, like the observatories in Hawaii and Chile. But by soaring through the stratosphere, at an elevation of 40,000 feet or higher, Sofia could fly above that water vapor and get a much better view. "Almost 50 percent of the energy of the universe comes out in the mid- to far infrared. Sofia has played an important and unique role for its lifetime, probing that entire wavelength range, and we've been able to observe all manner of phenomena that were otherwise invisible to other facilities," says Jim De Buizer, Sofia senior scientist at NASA's Ames Research Center in Mountain View, California.

De Buizer and the Sofia team have made a number of significant astronomical discoveries, including measuring cosmic magnetic fields permeating nearby galaxies, charting the growth of massive stars, observing Pluto's faint shadow as it passed in front of a distant star, and even discovering water on the sunlit surface of the moon's southern hemisphere. The data from Sofia's final flight will map stellar nebulas and help scientists study the magnetic fields of the Sculptor starburst galaxy. But while flying a telescope in a jet is much less expensive than launching one aboard a spacecraft, like NASA's Spitzer and Webb space telescopes and the European Space Agency's Herschel Space Observatory, it's still not cheap. There are costs for the pilots, staff, engineers, and mechanics -- plus a round of repairs to the aircraft that had to be made in 2018. Sofia costs NASA about $85 million per year -- a significant fraction of its astrophysics budget. And that's actually only 80 percent of the funding it needs; NASA's German counterparts provided the rest. It was ultimately the mission's high operating costs, relative to its scientific output, that took Sofia down. "At the end of the day, the project itself just wasn't productive. You're talking about almost a Hubble cost for operations, but with a fraction of the scientific productivity," says Casey Dreier, senior space policy adviser for the Planetary Society, a nonprofit research organization based in Pasadena, California.

"I feel for the scientists. They can't control the operational costs," Dreier says. "But Sofia got eight years of operations. It had a good, healthy life, for a mission."

NASA announced Thursday that it plans to study the possibility of using SpaceX's Crew Dragon vehicle to boost the aging Hubble Space Telescope into a higher orbit. Ars Technica reports: The federal agency has signed a "Space Act Agreement" with SpaceX to conduct a six-month study to determine the practicability of Dragon docking with the 32-year-old telescope and boosting it into a higher orbit. The study is not exclusive, meaning that other companies can propose similar concepts with alternative rockets and spacecraft. [...] Among the questions the new Hubble study will answer is the cost of such a mission and its technical feasibility. The principal goal is to boost Hubble's altitude from its current level of 535 km to 600 km, the same altitude it was at when first launched in 1990. Since the fifth and final servicing mission in 2009, Hubble has slowly been losing altitude, and this process is expected to accelerate as the telescope gets lower.

The telescope's project manager, Patrick Crouse, said during a teleconference with reporters that in absence of a re-boost mission, NASA might have to launch a propulsion module to the telescope by the end of the 2020s. This would ensure Hubble makes a controlled reentry into Earth's atmosphere and lands in the Pacific Ocean. A Dragon mission to boost Hubble's altitude could add 15 or even 20 years of orbital lifetime, Crouse said. The study will also look at potential servicing options, although nothing like the detailed instrument replacements and major upgrades performed during Hubble servicing missions with NASA's space shuttle. Rather, engineers from NASA and SpaceX will assess the feasibility of replacing the gyroscopes that control the pointing of the telescope. Only three of the spacecraft's six gyroscopes remain in working order.

NASA's Juno spacecraft has made the closest approach to Jupiter's tantalizing, icy moon Europa in more than 20 years. From a report: Juno on Thursday zipped within 222 miles (357 kilometers) of Europa, thought to have an ocean flowing beneath its thick frozen crust, raising the possibility of underwater life. Scientists hope to get lucky and observe possible water plumes shooting from the surface of Europa, close in size to Earth's moon. "We have to be at the right place at just the right time, but if we are so fortunate, it's a home run for sure," Juno's chief scientist, Scott Bolton of Southwest Research Institute in San Antonio, said in a statement. John Bordi, deputy mission manager at NASA's Jet Propulsion Laboratory, expected the spacecraft to go "screaming by pretty fast," with a relative velocity of almost 15 miles per second (23.6 kilometers per second). Pictures should be available by Friday, NASA said. The latest observations will help NASA plan for its Europa Clipper mission, due to launch in 2024. The European Space Agency also plans close encounters with its Jupiter Icy Moons Explorer, or Juice, lifting off next year.

NASA's DART spacecraft successfully slammed into a distant asteroid at hypersonic speed on Monday in the world's first test of a planetary defense system, designed to prevent a potential doomsday meteorite collision with Earth. From a report: Humanity's first attempt to alter the motion of an asteroid or any celestial body played out in a NASA webcast from the mission operations center outside Washington, D.C., 10 months after DART was launched. The livestream showed images taken by DART's camera as the cube-shaped "impactor" vehicle, no bigger than a vending machine with two rectangular solar arrays, streaked into the asteroid Dimorphos, about the size of a football stadium, at 7:14 p.m. EDT (2314 GMT) some 6.8 million miles (11 million km) from Earth. The $330 million mission, some seven years in development, was devised to determine if a spacecraft is capable of changing the trajectory of an asteroid through sheer kinetic force, nudging it off course just enough to keep Earth out of harm's way. Whether the experiment succeeded beyond accomplishing its intended impact will not be known until further ground-based telescope observations of the asteroid next month. But NASA officials hailed the immediate outcome of Monday's test, saying the spacecraft achieved its purpose.

Noam Izenberg, a researcher at the Johns Hopkins University's applied physics laboratory, is making a case for sending a crewed mission to examine Venus en route to Mars. "Venus gets a bad rap because it's got such a difficult surface environment," said Izenberg in a report presented at the International Astronautical Congress in Paris last week. "The current Nasa paradigm is moon-to-Mars. We're trying to make the case for Venus as an additional target on that pathway." The Guardian reports: There are notable downsides. Walking on the surface would be an unsurvivable experience, so astronauts would have to gaze down at the planet from the safety of their spacecraft in a flyby mission. In its favor, however, Venus is significantly closer, making a return mission doable in a year, compared with a potentially three-year roundtrip to Mars. A flyby would be scientifically valuable and could provide crucial experience of a lengthy deep-space mission as a precursor to visiting Mars, according to a report presented at the International Astronautical Congress (IAC) in Paris last week.

Izenberg said there were practical arguments for incorporating a Venus flyby into the crewed Mars landing that Nasa hopes to achieve by the late 2030s. Although the planet is in the "wrong" direction, performing a slingshot around Venus -- known as a gravity assist - could reduce the travel time and the fuel required to get to the red planet. That would make a crewed flyby trip to Venus a natural stepping stone towards Nasa's ultimate goal. "You'd be learning about how people work in deep space, without committing yourself to a full Mars mission," he said. "And it's not just going out into the middle of nowhere -- it would have a bit of cachet as you'd be visiting another planet for the first time." "We need to understand how we can get out of the cradle and move into the universe," he added.

There is also renewed scientific interest in Venus. The discovery of thousands of exoplanets raises the question of how many might be habitable, and scientists want to understand how and why Venus, a planet so similar to our own in size, mass and distance from the sun, ended up with infernal surface conditions. Izenberg said a Venus flyby "doesn't yet have traction" in the broader space travel community, although there are advocates within Nasa, including its chief economist, Alexander Macdonald, who led the IAC session. Of course, there are those who push back against such an idea. "It's really not a nice place to go. It's a hellish environment and the thermal challenges for a human mission would be quite considerable," said Prof Andrew Coates, a space scientist at UCL's Mullard space science laboratory.

He said Venus was rightly a focus of scientific exploration, but that "a human flyby really wouldn't add very much."