Sunday Reuters reported that "a sophisticated hacking group" backed by "a foreign government" has stolen information from America's Treasury Department, and also from "a U.S. agency responsible for deciding policy around the internet and telecommunications."

The Washington Post has since attributed the breach to "Russian government hackers," and discovered it's "part of a global espionage campaign that stretches back months, according to people familiar with the matter." Officials were scrambling over the weekend to assess the extent of the intrusions and implement effective countermeasures, but initial signs suggested the breach was long-running and significant, the people familiar with the matter said. The Russian hackers, known by the nicknames APT29 or Cozy Bear, are part of that nation's foreign intelligence service and breached email systems in some cases, said the people familiar with the intrusions, who spoke on the condition of anonymity because of the sensitivity of the matter. The same Russian group hacked the State Department and the White House email servers during the Obama administration... [The Washington Post has also reported this is the group responsible for the FireEye breach. -Ed]

All of the organizations were breached through the update server of a network management system called SolarWinds, according to four people familiar with the matter. The company said Sunday in a statement that monitoring products it released in March and June of this year may have been surreptitiously weaponized with in a "highly-sophisticated, targeted...attack by a nation state." The scale of the Russian espionage operation is potentially vast and appears to be large, said several individuals familiar with the matter. "This is looking very, very bad," said one person. SolarWinds products are used by more than 300,000 organizations across the world. They include all five branches of the U.S. military, the Pentagon, State Department, Justice Department, NASA, the Executive Office of the President and the National Security Agency, the world's top electronic spy agency, according to the firm's website. SolarWinds is also used by the top 10 U.S. telecommunications companies...

APT29 compromised the SolarWinds server that sends updates so that any time a customer checks in to request an update, the Russians could hitch a ride on that update to get into a victim's system, according to a person familiar with the matter. "Monday may be a bad day for lots of security teams," tweeted Dmitri Alperovitch, a cybersecurity expert and founder of the Silverado Policy Accelerator think tank.
Reuters described the breach as "so serious it led to a National Security Council meeting at the White House."

An anonymous reader quotes a report from CNN: In a high-stakes mission that could take five years to complete, NASA wants to land astronauts on Mars in the 2030s. Transporting enough oxygen and fuel on a spacecraft to sustain the mission for anywhere near that length of time, however, isn't currently viable. The way NASA plans to address this problem is by deploying MOXIE, or the Mars Oxygen in Situ Resource Utilization Experiment. This system is in the testing phase on the Mars Perseverance rover, which launched in July. The apparatus will convert the carbon dioxide that makes up 96% of the gas in the red planet's' atmosphere into oxygen.

On Mars, oxygen is only 0.13% of the atmosphere, compared to 21% of the Earth's atmosphere. The MOXIE system essentially produces oxygen like a tree -- pulling in the Martian air with a pump and using an electrochemical process to separate two oxygen atoms from each molecule of carbon dioxide, or CO2. The experimental technique proposed by Vijay Ramani and his colleagues uses a completely different resource -- salty water in lakes beneath the Martian surface. "The presence of the brine is fortuitous because it lowers freezing point of the water. You take the salty, brackish water and electrolyze that. Our process takes the water and splits it into hydrogen and oxygen," Ramani said. The method proposed in the new paper, however, assumes that these brines are readily available on Mars, said Michael Hecht, NASA's principal investigator for MOXIE and associate director for research management at the Massachusetts Institute of Technology's Haystack Observatory. The study has been published in the journal PNAS.

"NASA's twin Voyager probes keep making discoveries in interstellar space," reports Space.com The Voyager mission has detected a new type of "electron burst," which will provide insights into the mechanisms of flaring stars, a new study reports. The bursts occur when cosmic ray electrons — fast-moving particles from far beyond the solar system — are pushed by shock waves generated by solar eruptions. The electrons then accelerate further along cosmic magnetic field lines to incredible speed, study team members said.

"The idea that shock waves accelerate particles is not new," corresponding author Don Gurnett, professor emeritus in physics and astronomy at the University of Iowa, said in a statement. "[But] we detected it in a new realm: the interstellar medium, which is much different than in the solar wind, where similar processes have been observed...."

Eventually, the magnetic field lines propel the cosmic rays to almost the speed of light — nearly 670 times faster than the solar shock waves that first pushed them. (The shock waves move at roughly 1 million mph, or 1.6 million kph, study team members said.)
The article marvels at the fact that the spacecraft are still sending back data regularly from 14 billion miles away, beyond the edge of our solar system, more than 43 years after they left earth. They even detected the original solar shock wave which caused the electron burst "up to a year after the event occurred.

"The wait time happened because the spacecraft are so far from the sun."

The Verge reports that a power component failed on the Orion deep-space crew capsule that NASA hopes to launch (unmanned) from its Space Launch System (or SLS) in late 2021, in a mission called Artemis 1.

The problem? It's buried deep within one of the spacecraft's power/data units (or PDUs) within the adapter that connects the capsule to its power/propulsion trunk "service module," so there's no easy way to fix it: As many as nine months would be needed to take the vehicle apart and put it back together again, in addition to three months for subsequent testing, according to the presentation. Lockheed has another option, but it's never been done before and may carry extra risks, Lockheed Martin engineers acknowledge in their presentation. To do it, engineers would have to tunnel through the adapter's exterior by removing some of the outer panels of the adapter to get to the PDU. The panels weren't designed to be removed this way, but this scenario may only take up to four months to complete if engineers figure out a way to do it. A third option is that Lockheed Martin and NASA could fly the Orion capsule as is. The PDU failed in such a way that it lost redundancy within the unit, so it can still function. But at a risk-averse agency like NASA, flying a vehicle without a backup plan is not exactly an attractive option...

If engineers choose to remove Orion from its service module, the capsule's first flight on the SLS may be delayed past its current date of November 2021. But the SLS has experienced its own set of delays: it was supposed to fly for the first time in 2017 but hasn't done so yet. It's not clear if the SLS itself will make the November 2021 flight date either; a key test of the rocket coming up at the end of the year has been pushed back, with no new target date set. So it's possible that Lockheed Martin and NASA can fix Orion before the SLS is ready to fly.

Any further delays to Artemis I add uncertainty to NASA's lunar landing timeline. NASA is hoping to land astronauts on the Moon by 2024, though many experts are skeptical that such a mission can be pulled off in time. Artemis I is vulnerable to other possible delays, but the component failure adds one more level of uncertainty to when the Orion and SLS combo will get off the ground.

Friday on Instagram Jeff Bezos shared footage from NASA's test of Blue Origin's BE-7 engine, which he described approvingly as "a high-performance, additively manufactured liquid hydrogen/liquid oxygen lunar landing engine with 10,000 lbf [pound-force] of thrust — deep throttling down to 2,000 lbf for a precise landing on the Moon."

The test brings the program's cumulative test time up to 1,245 seconds, reports Reuters: Blue Origin leads a "national team" as the prime contractor that it assembled in 2019 to help build its Blue Moon lander. That team includes Lockheed Martin Corp, Northrop Grumman Corp and Draper. Blue Origin has vied for lucrative government contracts in recent years and is competing with rival billionaire Elon Musk's SpaceX and Dynetics, owned by Leidos Holdings Inc, to win a contract to build NASA's next human lunar landing system to ferry humans to the moon in the next decade.

In April, NASA awarded a lunar lander development contract to Blue Origin's team worth $579 million, as well as two other companies: SpaceX which received $135 million to help develop its Starship system and Leidos-owned Dynetics which won $253 million. NASA is poised to pick two of the three companies "in early March" 2021 to continue building their lander prototypes for crewed missions to the moon beginning in 2024, an agency spokeswoman has said.

"There's another global disaster we also need to try to prevent," Bill Gates wrote on his blog Thursday: "climate change."

As I have tried to make clear on this blog over the past two years, we have only some of the tools we need to eliminate the world's greenhouse gases. We need breakthroughs in the way we generate and store clean electricity, grow food, make things, move around, and heat and cool our buildings, so we can do all these things without adding more greenhouse gases to the atmosphere.

In short, we need to revolutionize the world's physical economy — and that will take, among other things, a dramatic infusion of ingenuity, funding, and focus from the federal government. No one else has the resources to drive the research we need.
CNBC summarizes Gates' plan: Bill Gates on Thursday proposed the formation of a new U.S. agency to tackle climate change and a five-fold jump in funding for research on renewable energy... "There's no central office that's responsible for evaluating and nurturing great ideas," Gates wrote. "For example, research on clean fuels is managed by offices in the departments of Energy, Transportation, and Defense — and even NASA. Similarly, responsibility for research on energy storage is spread across at least four offices in the Department of Energy..."


"To be fair, the U.S. isn't the only country that underfunds clean energy research," Gates writes on his blog. "All the governments in the world spend about $22 billion a year on it, or around 0.02 percent of the global economy. Americans spend more than that on gasoline in a single month."

In February Gates will publish a book titled How to Avoid a Climate Disaster: The Solutions We Have and the Breakthroughs We Need.

"A Mysterious Object Is Hurtling Towards Earth, and Scientists Don't Know What It Is," read Newsweek's headline on Monday, describing an object projected to pass 31,605 miles from earth. (One astronomer told them that was roughly 13% of the average distance between the earth and the moon).

But then a computer model calculated its past trajectories through space, according to the director for NASA's Center for Near Earth Object Studies (CNEOS). "One of the possible paths for 2020 SO brought the object very close to Earth and the Moon in late September 1966," he said in a statement. "It was like a eureka moment when a quick check of launch dates for lunar missions showed a match with the Surveyor 2 mission."

On Wednesday NASA described how a team led by Vishnu Reddy, an associate professor/planetary scientist at the Lunar and Planetary Laboratory at the University of Arizona, tried to prove what they'd seen was a 54-year-old booster rocket: Through a series of follow up observations, Reddy and his team analyzed 2020 SO's composition using NASA's IRTF and compared the spectrum data from 2020 SO with that of 301 stainless steel, the material Centaur rocket boosters were made of in the 1960's. While not immediately a perfect match, Reddy and his team persisted, realizing the discrepancy in spectrum data could be a result of analyzing fresh steel in a lab against steel that would have been exposed to the harsh conditions of space weather for 54 years. This led Reddy and his team to do some additional investigation.

"We knew that if we wanted to compare apples to apples, we'd need to try to get spectral data from another Centaur rocket booster that had been in Earth orbit for many years to then see if it better matched 2020 SO's spectrum," said Reddy. "Because of the extreme speed at which Earth-orbiting Centaur boosters travel across the sky, we knew it would be extremely difficult to lock on with the IRTF long enough to get a solid and reliable data set."

However, on the morning of Dec. 1, Reddy and his team pulled off what they thought would be impossible. They observed another Centaur D rocket booster from 1971 launch of a communication satellite that was in Geostationary Transfer Orbit, long enough to get a good spectrum. With this new data, Reddy and his team were able to compare it against 2020 SO and found the spectra to be consistent with each another, thus definitively concluding 2020 SO to also be a Centaur rocket booster...
So what happens next? 2020 SO made its closest approach to Earth on Dec. 1, 2020 and will remain within Earth's sphere of gravitational dominance — a region in space called the "Hill Sphere" that extends roughly 930,000 miles (1.5 million kilometers) from our planet — until it escapes back into a new orbit around the Sun in March 2021.

As NASA-funded telescopes survey the skies for asteroids that could pose an impact threat to Earth, the ability to distinguish between natural and artificial objects is valuable as nations continue to explore and more artificial objects find themselves in orbit about the Sun.

Astronomers will continue to observe this particular relic from the early Space Age until it's gone.

Long-time Slashdot reader destinyland writes: Advent of Code isn't the only geeky tradition that's continuing in 2020. "This is going to be the first full year with Raku being called Raku," notes the site raku-advent.blog. "However, it's going to be the 12th year (after this first article) in a row with a Perl 6 or Raku calendar, previously published in the Perl 6 Advent Calendar blog." The tradition continues, with a new article about the Raku programming language every day until Christmas.

And meanwhile over at perladvent.org, the Perl Advent Calendar is also continuing its own article-a-day tradition (starting with a holiday tale about how Perl's TidyAll library "makes it trivial for the elves to keep their code formatting consistent and clean.")

But they're not the only ones. "Pandemic or not, Christmas time is a time for wonder, joy and sharing," writes Kristofer Giltvedt Selbekk from Oslo-based Bekk Consulting (merging technology with user experience, product innovation and strategy). So this year they're "continuing our great tradition of sharing some of the stuff we know every December" with 11 different advent calendar sites sharing articles (or, on one site, podcast episodes), on topics including JavaScript, Kotlin, React, Elm, functional programming, and cloud computing.

And if you're more interested in outer space, this also marks the 13th year for the official Hubble Space Telescope Advent Calendar. "Every day until Friday, December 25, this page will present one new incredible image of our universe from NASA's Hubble telescope," explains its page at the Atlantic.
There's also a series of daily coding challenges called "24 days of JavaScriptmas" at the tutorial site Scrimba, which has turned the event into a marketing opportunity by promising a $1,000 prize on Christmas Eve to one lucky participant chosen from the ones who publicized their solutions on Twitter.

An anonymous reader shares a report: Dec. 2 was the 25th anniversary of the Solar and Heliospheric Observatory (SOHO), a joint project from NASA and the European Space Agency. To celebrate, the agencies released a dramatic, nearly 50-minute-long video showing the sun blasting out solar material from 1998 through 2020. The SOHO spacecraft constantly stares at the sun, recording its every whim. It's spectacular and mesmerizing. "What becomes clear as the sun turns and years pass and background stars whirl by, is how constant the stream of material is that is blasted in all directions -- the solar wind," ESA said in a statement on Wednesday. "This constant wind is interrupted only by huge explosions that fling bows of material at vast speeds, filling the solar system with ionized material and solar radiation."

Amazon is laying the groundwork for a quantum computer, deepening efforts to harness technology that can crunch in seconds vast amounts of data that take even the most powerful supercomputers hours or days to process. From a report: Amazon has been hiring for a Quantum Hardware Team within its Amazon Web Services Center for Quantum Computing, according to internal job postings and information on LinkedIn. Marc Runyan, a former engineer with NASA's Jet Propulsion Laboratory, lists his title on the professional social network as senior quantum research scientist at Amazon and describes his role as "helping to design and build a quantum computer for Amazon Web Services." [...] Among Amazon's recent hires are research scientists focusing on designing a new superconducting quantum device as well as device fabrication. Developing its own quantum computer would let Amazon more closely mirror the approach taken by its major cloud rivals. International Business Machines first made a quantum computer available to the public in 2016 and has rolled out regular upgrades.

Long-time Slashdot reader SonicSpike brings some big news from outer space. European Space Agency announced this week that they're signing "a €86 million ($102 million USD) contract with an industrial team led by the Swiss start-up ClearSpace SA to purchase a unique service: the first removal of an item of space debris from orbit" in the year 2025.

"With this contract signature, a critical milestone for establishing a new commercial sector in space will be achieved..." In almost 60 years of space activities, more than 5,550 launches have resulted in some 42,000 tracked objects in orbit, of which about 23,000 remain in space and are regularly tracked. With today's annual launch rates averaging nearly 100, and with break-ups continuing to occur at average historical rates of four to five per year, the number of debris objects in space will steadily increase. ClearSpace-1 will demonstrate the technical ability and commercial capacity to significantly enhance the long-term sustainability of spaceflight...
"This is the right time for such a mission..." says Luc Piguet, founder and CEO of ClearSpace. [I]n the coming years the number of satellites will increase by an order of magnitude, with multiple mega-constellations made up of hundreds or even thousands of satellites planned for low Earth orbit to deliver wide-coverage, low-latency telecommunications and monitoring services. The need is clear for a 'tow truck' to remove failed satellites from this highly trafficked region...." Supported within ESA's new Space Safety programme, the aim is to contribute actively to cleaning up space, while also demonstrating the technologies needed for debris removal.

"Imagine how dangerous sailing the high seas would be if all the ships ever lost in history were still drifting on top of the water," says ESA Director General Jan Wörner. "That is the current situation in orbit, and it cannot be allowed to continue. ESA's Member States have given their strong support to this new mission, which also points the way forward to essential new commercial services in the future..."

"NASA and ESA studies show that the only way to stabilise the orbital environment is to actively remove large debris items. Accordingly we will be continuing our development of essential guidance, navigation and control technologies and rendezvous and capture methods through a new project called Active Debris Removal/ In-Orbit Servicing — ADRIOS. The results will be applied to ClearSpace-1. This new mission, implemented by an ESA project team, will allow us to demonstrate these technologies, achieving a world first in the process."

The ClearSpace-1 mission will target the Vespa (Vega Secondary Payload Adapter) upper stage left in an approximately 800 km by 660 km altitude orbit after the second flight of ESA's Vega launcher back in 2013. With a mass of 100 kg, the Vespa is close in size to a small satellite, while its relatively simple shape and sturdy construction make it a suitable first goal, before progressing to larger, more challenging captures by follow-up missions — eventually including multi-object capture. The ClearSpace-1 'chaser' will be launched into a lower 500-km orbit for commissioning and critical tests before being raised to the target orbit for rendezvous and capture using a quartet of robotic arms under ESA supervision. The combined chaser plus Vespa will then be deorbited to burn up in the atmosphere.

Ars Technica glimpsed a possible future at the Johns Hopkins University Applied Physics Laboratory: a solar simulator "that can shine with the intensity of 20 Suns..."

"They think it could be the key to interstellar exploration." "It's really easy for someone to dismiss the idea and say, 'On the back of an envelope, it looks great, but if you actually build it, you're never going to get those theoretical numbers,'" says Benkoski, a materials scientist at the Applied Physics Laboratory and the leader of the team working on a solar thermal propulsion system. "What this is showing is that solar thermal propulsion is not just a fantasy. It could actually work."

In 2019, NASA tapped the Applied Physics Laboratory to study concepts for a dedicated interstellar mission. At the end of next year, the team will submit its research to the National Academies of Sciences, Engineering, and Medicine's Heliophysics decadal survey, which determines Sun-related science priorities for the next 10 years... In mid-November, [APL's] Interstellar Probe researchers met online for a weeklong conference to share updates as the study enters its final year. At the conference, teams from APL and NASA shared the results of their work on solar thermal propulsion, which they believe is the fastest way to get a probe into interstellar space.

The idea is to power a rocket engine with heat from the Sun, rather than combustion. According to Benkoski's calculations, this engine would be around three times more efficient than the best conventional chemical engines available today. "From a physics standpoint, it's hard for me to imagine anything that's going to beat solar thermal propulsion in terms of efficiency," says Benkoski. "But can you keep it from exploding...?" If the interstellar probe makes a close pass by the Sun and pushes hydrogen into its shield's vasculature, the hydrogen will expand and explode from a nozzle at the end of the pipe. The heat shield will generate thrust. It's simple in theory but incredibly hard in practice.

A solar thermal rocket is only effective if it can pull off an Oberth maneuver, an orbital-mechanics hack that turns the Sun into a giant slingshot. The Sun's gravity acts like a force multiplier that dramatically increases the craft's speed if a spacecraft fires its engines as it loops around the star... The big takeaway from his research, says Dean Cheikh, a materials technologist at NASAâ(TM)s Jet Propulsion Laboratory, is there's a lot of testing that needs to be done on heat shield materials before a solar thermal rocket is sent around the Sun. But it's not a deal-breaker. "Additive manufacturing is a key component of this, and we couldn't do that 20 years ago. Now I can 3D-print metal in the lab."

To discard the theory of dark matter, "you'll need to replace it with something even more bizarre: a force of gravity that, at some distances, pulls massive objects together and, at other distances, pushes them apart." That's how Science magazine describes a new study, adding that "The analysis underscores how hard it is to explain away dark matter" — even though "after decades of trying, physicists haven't spotted particles of dark matter floating around." [T]o do away with dark matter, theorists would also need explain away its effects on much larger, cosmological scales. And that is much harder, argues Kris Pardo, a cosmologist at NASA's Jet Propulsion Laboratory, and David Spergel, a cosmologist at Princeton University. To make their case, they compare the distribution of ordinary matter in the early universe as revealed by measurements of the afterglow of the big bang — the cosmic microwave background (CMB) — with the distribution of the galaxies today....

Pardo and Spergel derived a mathematical function that describes how gravity would have had to work to get from the distribution of ordinary matter revealed by the CMB to the current distribution of the galaxies. They found something striking: That function must swing between positive and negative values, meaning gravity would be attractive at some length scales and repulsive at others, Pardo and Spergel report this week in Physical Review Letters. "And that's superweird," Pardo says...

In a paper posted in June to the preprint server arXiv, theoretical cosmologists Constantinos Skordis and Tom Zlosnik of the Czech Academy of Sciences present a dark matter-less theory of modified gravity they say jibes with CMB data. To do that, researchers add to a theory like general relativity an additional, tunable field called a scalar field. It has energy, and through Einstein's equivalence of mass and energy, it can behave like a form of mass. Set things up just right and at large spatial scales, the scalar field interacts only with itself and acts like dark matter...

Skordis's and Zlosnik's paper is "very exciting," Pardo says. But he notes that in some sense it merely replaces one mysterious thing — dark matter — with another — a carefully tuned scalar field. Given the complications, Pardo says, "dark matter is kind of the easier explanation."

While tonight will see SpaceX's 16th launch of its broadband satellites, that launch will also make history, reports CNET: The first stage of the Falcon 9 rocket is set to make its seventh flight, which would be a record for rocket recycling for the company. The booster previously flew on four Starlink missions and a pair of larger telecom satellite launches. SpaceX will likely attempt to land the booster on a droneship in the Atlantic shortly after launch and may also try to catch the two halves of the nose cone or fairing with another pair of ships.

This all happens just about 10 hours after SpaceX is scheduled to perform another big launch on the other side of the country. On Saturday morning [in just one half hour], another Falcon 9 will blast off from Vandenburg Air Force Base in California carrying the new NASA/European Space Agency Sentinel 6 Michael Freilich satellite designed to monitor global sea level rise and improve weather forecasting...

You can watch the whole thing right here.
SpaceX has also begun tweeting photos taken last weekend during its Crew Dragon capsule's flight from earth— and its arrival at the International Space Station.

Researchers with NASA's New Horizons say they've finally been able to determine if space is truly black. The group has posted their work online, and it will soon appear ini the Astrophysical Journal. NPR reports: New Horizons was originally designed to explore Pluto, but after whizzing past the dwarf planet in 2015, the intrepid spacecraft just kept going. It's now more than four billion miles from home -- nearly 50 times farther away from the Sun than the Earth is. That's important because it means the spacecraft is far from major sources of light contamination that make it impossible to detect any tiny light signal from the universe itself. Around Earth and the inner solar system, for example, space is filled with dust particles that get lit up by the Sun, creating a diffuse glow over the entire sky. But that dust isn't a problem out where New Horizons is. Plus, out there, the sunlight is much weaker.

To try to detect the faint glow of the universe, researchers went through images taken by the spacecraft's simple telescope and camera and looked for ones that were incredibly boring. Then they processed these images to remove all known sources of visible light. Once they'd subtracted out the light from stars, plus scattered light from the Milky Way and any stray light that might be a result of camera quirks, they were left with light coming in from beyond our own galaxy. They then went a step further still, subtracting out light that they could attribute to all the galaxies thought to be out there. And it turns out, once that was done, there was still plenty of unexplained light.

In fact, the amount of light coming from mysterious sources was about equal to all the light coming in from the known galaxies, says Marc Postman, an astronomer with the Space Telescope Science Institute in Baltimore, Maryland. So maybe there are unrecognized galaxies out there, he says, "or some other source of light that we don't yet know what it is." [...] So where does the light come from? Perhaps, he says, there are far more small, faint dwarf galaxies and other faint regions on the outskirts of galaxies that instruments like the Hubble Space Telescope can't detect and so scientists just aren't aware of them. Or, maybe there's more dust out there interfering with the measurements than scientists expected. Or perhaps there's a more exotic explanation -- some unknown phenomenon out in the universe that creates visible light. It's even possible it's something associated with dark matter, a mysterious form of matter that exerts a gravitational pull on visible matter but has never been seen directly.

A group of astronomers from The University of Texas at Austin has revived an idea shelved by NASA to build a lunar liquid-mirror telescope on the moon to study the first stars in the universe. "The team, led by NASA Hubble Fellow Anna Schauer, will publish their results in an upcoming issue of The Astrophysical Journal," reports Phys.Org. From the report: These first stars formed about 13 billion years ago. They are unique, born out of a mix of hydrogen and helium gasses, and likely tens or 100 times larger than the Sun. New calculations by Schauer show that a previously proposed facility, a liquid mirror telescope that would operate from the surface of the Moon, could study these stars. Proposed in 2008 by a team led by Roger Angel of The University of Arizona, this facility was called the Lunar Liquid-Mirror Telescope (LLMT). NASA had done an analysis on this proposed facility a decade ago, but decided not to pursue the project. According to Niv Drory, a senior research scientist with UT Austin's McDonald Observatory, the supporting science on the earliest stars did not exist at that point. "This telescope is perfect for that problem," he said.

The proposed lunar liquid-mirror telescope, which Schauer has nicknamed the "Ultimately Large Telescope," would have a mirror 100 meters in diameter. It would operate autonomously from the lunar surface, receiving power from a solar power collection station on the Moon, and relaying data to satellite in lunar orbit. Rather than coated glass, the telescope's mirror would be made of liquid, as it's lighter, and thus cheaper, to transport to the Moon. The telescope's mirror would be a spinning vat of liquid, topped by a metallic -- and thus reflective -- liquid. (Previous liquid mirror telescopes have used mercury.) The vat would spin continuously, to keep the surface of the liquid in the correct paraboloid shape to work as a mirror. The telescope would be stationary, situated inside a crater at the Moon's north or south pole. To study the first stars, it would stare at the same patch of sky continuously, to collect as much light from them as possible. The team is proposing that the astronomical community revisit the shelved plan for a lunar liquid-mirror telescope, as a way to study these first stars in the universe.

Four astronauts aboard their SpaceX Dragon capsule "Resilience" have arrived at the International Space Station, circling 262 miles above the Earth, where they will stay until spring. From a report: The capsule lifted off from the Kennedy Space Center Sunday evening atop a SpaceX Falcon 9 rocket, chasing the ISS for 27 hours before matching its altitude and speed for an orbital dock. The flight marks only the second crewed flight for Crew Dragon, which became the first commercial vehicle to put humans in orbit when astronauts Doug Hurley and Bob Behnken launched in May. "SpaceX, this is Resilience. Excellent job, right down the center," commander Hopkins radioed to mission control after the docking. "SpaceX and NASA, congratulations." The flight marks another milestone for SpaceX flying its first fully operational mission. After the May launch, designated "Demo-2" with Hurley and Behnken, NASA certified the capsule for operational use in its Commercial Crew program. The Resilience crew includes three NASA astronauts and one from the Japan Aerospace Exploration Agency who were mostly passengers during the flight of Crew Dragon, which generally flies without human input and docks to the ISS autonomously.

The big launch finally happens in 2 minutes. "All systems are go for tonight's launch at 7:27 p.m. EST of Crew Dragon's first operational mission with four astronauts on board," SpaceX tweeted this morning. But live coverage is already streaming on SpaceX's web site.

Space.com explains it's the first operational flight of SpaceX's "astronaut taxi," the Crew Dragon: Called Crew-1, this will be the second Crew Dragon mission to carry astronauts. NASA astronauts Michael Hopkins, Victor Glover and Shannon Walker, along with Japan Aerospace Exploration Agency astronaut Soichi Noguchi, will lift off from the historic Launch Complex 39A at NASA's Kennedy Space Center in Florida at 7:27p.m. EST (0027 GMT) to begin a six-month mission.
Space.com reports that the astronauts completed their 9-mile (14 km) drive to the Falcon 9 rocket on the launch pad inside a pair of Tesla's electric Model X SUVs.

In another report, CBS News has confirmed that SpaceX "plans to reuse the booster for the next Crew Dragon flight." NASA is counting on the Crew-1 flight and follow-on missions by SpaceX and Boeing to end the agency's sole reliance on Russian Soyuz spacecraft for trips to and from low-Earth orbit. NASA has spent $4 billion since 2006 buying seats aboard Soyuz spacecraft and another $6 billion to date on its Commercial Crew Program, ultimately awarding contracts to SpaceX and Boeing... With two successful test flights behind them, NASA engineers were able to certify the spacecraft after a detailed analysis of telemetry and inspections of the flight hardware. It was the first such certification since the space shuttle was being built in the 1970s and the first ever granted a commercially developed spacecraft.

"I believe 20 years from now, we're going to look back at this time as a major turning point in our exploration and utilization of space," said Phil McAlister, director of commercial spaceflight development at NASA Headquarters. "It's not an exaggeration to state that with this milestone, NASA and SpaceX have changed the historical arc of human space transportation...

The station's life support systems, including its water recycling equipment and carbon dioxide removal gear, have been beefed up to support a seven-member crew and additional stores and supplies have been laid in. But the U.S. segment of the station only has four crew "sleep stations" and Hopkins plans to bunk with a sleeping bag in the powered-down Crew Dragon.

Axiom Space has signed three private astronauts to join former NASA astronaut Michael Lopez-AlegrÃa on Ax-1, the first private mission into orbit and to the International Space Station. From a report: In March, Axiom Space announced plans to launch "history's first fully private human spaceflight mission to the International Space Station." The mission, dubbed Ax-1, would go forward using SpaceX's Crew Dragon vehicle to deliver private astronauts to the ISS for at least eight days. At the International Astronautical Congress last month, Axiom CEO Michael Suffredini said the company was aiming to launch in the fourth quarter of 2021. Details are still sparse. We know that former NASA astronaut Michael Lopez-AlegrÃa will be part of the mission, but the three other astronauts have not been announced yet. The promotional image Axiom posted Wednesday features three male silhouettes, suggesting there will be no female astronauts on board. There is some excitable chatter on Twitter and other places suggesting that two of the other astronauts might be actor Tom Cruise and director Doug Liman, who have been in talks with NASA about filming a movie on the ISS. NASA administrator Jim Bridenstine mentioned in June that Axiom was involved in those talks.

sciencehabit writes: Two years ago, a global dust storm veiled Mars. But although the storm took a toll, killing off NASA's Opportunity rover, it also revealed that such storms play an important role in how the once-wet planet loses its water. In 2014, looking back at data from 2007, scientists noticed that the fluorescent fog of hydrogen in the martian upper atmosphere faded as the southern hemisphere's summer ended and a previous global dust storm subsided. The only plausible source for that hydrogen was water. Subsequent observations have indicated that water, buoyed by storms, can reach much higher in the atmosphere than previously thought -- all the way to the ionosphere, a new paper reports. This allows charged particles to directly break the water apart, and it is likely the primary method of water loss on the planet today.