sciencehabit shares a report from Science Magazine: Researchers have discovered a common martian mineral deep within an ice core from Antarctica. The find suggests the mineral -- a brittle, yellow-brown substance known as jarosite -- was forged the same way on both Earth and Mars: from dust trapped within ancient ice deposits. It also reveals how important these glaciers were on the Red Planet: Not only did they carve valleys, the researchers say, but they also helped create the very stuff Mars is made of.

Jarosite was first spotted on Mars in 2004, when the NASA Opportunity rover rolled over fine-grained layers of it. The discovery made headlines because jarosite needs water to form, along with iron, sulfate, potassium, and acidic conditions. The work suggests jarosite forms the same way on Mars, says Megan Elwood Madden, a geochemist at the University of Oklahoma who was not involved with the research. But she wonders whether the process can explain the huge abundance of jarosite on Mars. "On Mars, this is not just some thin film," she says. "These are meters-thick deposits."

[Giovanni Baccolo, a geologist at the University of Milan-Bicocca] concedes that the ice core contained only small amounts of jarosite, particles smaller than an eyelash or a grain of sand. But he explains that there's much more dust on Mars than in Antarctica, which only receives small amounts of airborne ash and dirt from northern continents. "Mars is such a dusty place -- everything is covered in dust," Baccolo says. More ash would favor more jarosite formation under the right conditions, he says. Baccolo wants to use Antarctic cores to investigate whether ancient martian ice deposits were cauldrons for the formation of other minerals. He says jarosite shows how glaciers weren't just land carving machines, but might have contributed to Mars's chemical makeup. "This is just the first step in linking deep Antarctic ice with the martian environment." The researchers reported their findings this month in Nature Communications.

A Vancouver seaplane company says its retro-fitted all electric airplane is set to take to the skies for more test flights this year, as it pushes forward with its plans to make commercial air travel cheaper and greener. CBC.ca reports: "There's no wavering in our confidence and determination and interest in getting this done," said Harbour Air CEO Greg McDougall. Founded by McDougall in 1982, Harbour Air uses small propeller planes to fly commercial flights between the Lower Mainland, Seattle, Vancouver Island, the Gulf Islands and Whistler.

In the last few years it has turned its attention to becoming a leader in green urban mobility, which would do away with the need to burn fossil fuels for air travel. In December 2019, McDougall flew one of Harbour Air's planes, a more than 60-year-old DHC-2 de Havilland Beaver float plane, which had been outfitted with a Seattle-based company's electric propulsion system, for three minutes over Richmond B.C.

Harbour Air joined with Seattle-based company MagniX in early 2019 to design the e-plane's engine, which was powered by NASA-approved lithium-ion batteries that were also used on the International Space Station. At the time, based on the success of that inaugural flight, McDougall had hoped to be using the plane to fly passengers on its routes, such as between downtown Vancouver and downtown Victoria, by the end of this year. Now, that timeline has been pushed back at least one year due to the pandemic.

Boeing's test of the largest rocket in U.S. history ended earlier than expected on Jan. 16 because a hydraulic-system setting exceeded a preset limit, dealing another setback to the company's space ambitions. From a report: The first firing of all four RS-25 engines on the Space Launch System rocket ended just 67.2 seconds into the planned eight-minute test. The so-called hot fire exercise at the NASA's Stennis Space Center in Mississippi was designed to simulate a full flight from Earth. Engineers from NASA, Boeing and the engines' maker, Aerojet-Rocketdyne Holdings, will assess data and determine whether a second test is needed or if the rocket is ready to ship to Florida's Kennedy Space Center to prepare for its maiden flight. The SLS can be loaded with its super-chilled propellants -- liquid oxygen and liquid hydrogen -- only nine times, which will be a consideration in whether to stage a second test at Stennis, NASA said Tuesday.

The shutdown "was triggered by test parameters that were intentionally conservative to ensure the safety of the core stage during the test," NASA said in a blog post Tuesday. Preliminary inspections and data reviews "show the rocket's hardware is in excellent condition," the agency said. The test was cut short just as the engines began to pivot and test their thrust capability while rotating on gimbals. The premature end, before engineers collected a full array of data, represented another hurdle for Boeing's space program. The SLS rocket has been plagued by years of delays and billions of dollars in cost overruns. The program has broad support in Congress because of the federal contracts and jobs it offers across many states. Boeing also is attempting to correct glitches with its Starliner spacecraft, which would ferry astronauts to and from the International Space Station under a NASA contract. Boeing said Monday it had completed qualification of Starliner's flight software following an extensive review. A second test of the vehicle to the ISS is slated for March, following a botched flight in December 2019. A crewed flight is expected later this year.

CNN reports: A 70-foot rocket, riding beneath the wing of a retrofitted Boeing 747 aircraft, detached from the plane and fired itself into Earth's orbit on Sunday — marking the first successful launch for the California-based rocket startup Virgin Orbit.

Virgin Orbit's 747, nicknamed Cosmic Girl, took off from California around 10:30 am PT with the rocket, called LauncherOne, nestled beneath the plane's left wing. The aircraft flew out over the Pacific Ocean before the rocket was released, freeing LauncherOne and allowing it to power up its rocket motor and propel itself to more than 17,000 miles per hour, fast enough to begin orbiting the Earth... The rocket flew a group of tiny satellites on behalf of NASA's Educational Launch of Nanosatellites, or ELaNa, program, which allows high school and college students to design and assemble small satellites that NASA then pays to launch into space... About four hours after takeoff on Saturday, Virgin Orbit confirmed in a tweet that all the satellites were "successfully deployed into our target orbit."

The successful mission makes Virgin Orbit only the third so-called "New Space" company — startups hoping to overhaul the traditional industry with innovative technologies — to reach orbit, after SpaceX and Rocket Lab. The success also paves the way for Virgin Orbit to begin launching satellites for a host of customers that it already has lined up, including NASA, the military and private-sector companies that use satellites for commercial purposes.
Virgin Orbit shared a 57-second video on Twitter showing the moment their rocket was released and then launched, saying the event went exactly as planned.

"To say we're thrilled would be a massive understatement, but 240 characters couldn't do it justice anyway."

"NASA declared the Mars digger dead Thursday after failing to burrow deep into the red planet to take its temperature," reports the Associated Press: Scientists in Germany spent two years trying to get their heat probe, dubbed the mole, to drill into the Martian crust. But the 16-inch-long (40-centimeter) device that is part of NASA's InSight lander couldn't gain enough friction in the red dirt. It was supposed to bury 16 feet (5 meters) into Mars, but only drilled down a couple of feet (about a half meter). Following one last unsuccessful attempt to hammer itself down over the weekend with 500 strokes, the team called it quits.

"We've given it everything we've got, but Mars and our heroic mole remain incompatible," said the German Space Agency's Tilman Spohn, the lead scientist for the experiment...

InSight's French seismometer, meanwhile, has recorded nearly 500 Marsquakes, while the lander's weather station is providing daily reports.

"NASA's rocket charged with taking the agency back to the moon fired its four main engines Saturday afternoon, but the test in Mississippi was cut short after a malfunction caused an automatic abort," reports Florida Today...

"We did get an MCF on engine four," a control room member said less than a minute into the test fire, using an initialism that stands for "major component malfunction...." The engines fired for 12 more seconds after the exchange before an automatic shutdown was called. The test was meant to last eight minutes — the full duration needed for the booster during its Artemis program liftoff — but only ran less than two minutes.

Prime contractor Boeing previously said the test would need to run at least 250 seconds, or more than four minutes, for teams to gather enough data to move forward with transport to Kennedy Space Center and launch sometime before the end of the year. An exact plan moving forward, which could mean a second test and delay before transport to Florida, had not yet been released by Saturday evening.
Or, as the Guardian reports, "It was unclear whether Boeing and Nasa would have to repeat the test, a prospect that could push the debut launch into 2022."

In a press conference tonight, a NASA official specifically addressed the question of whether or not a launch this year was still feasible. "I think it's still too early to tell. I think as we figure out what went wrong, we're going to know what the future holds. And right now we just don't know...

"Not everything went according to script today, but we got a lot of great data, a lot of great information. I have absolutely total confidence in the team to figure out what the anomaly was, figure out how to fix it, and then get after it again... Depending on what we learn, we might not have to do it again."

They added that there was no sign of engine damage, and emphasized to reporters another way to view the significance of this afternoon's event. "A rocket capable of taking humans to the moon, was firing, all four engines at the same time." And they also stressed that this afternoon's result was not a failure -- but a test. "When you test, you learn things..."

"We're going to make adjustments, and we're going to fly to the moon. That's what the Artemis program is all about, that's what NASA is all about, and that's what America is all about. We didn't get everything we wanted, and yeah, we're going to have to make adjustments. But this was a test, and this is why we test.

"If you're expecting perfection on a first test, then you've never tested before."

"The date is set," NASA had tweeted Friday, thanking its partners Boeing Space and Aerojet Rocketdyne for Saturday's "hot fire" test of the SLS's core stage.

"One of NASA's main goals for 2021 is to launch Artemis I, an uncrewed moon mission meant to show the Orion spacecraft and Space Launch System rocket can safely send humans to our lunar neighbor," reported CNET. "But first, NASA plans to make some noise with a fiery SLS test on Saturday."

Below is the original report that schwit1 had shared from Space.com: It's a critical test for NASA and the final step in the agency's "Green Run" series of tests to ensure the SLS rocket is ready for its first launch... In the upcoming hot-fire engine test, engineers will load the Boeing-built SLS core booster with over 700,000 gallons of cryogenic (that's really cold) propellant into the rocket's fuel tanks and light all four of its RS-25 engines at once. The engines will fire for 485 seconds (a little over 8 minutes) and generate a whopping 1.6 million pounds of thrust throughout the test...

Following the success of this hot fire test and subsequent uncrewed missions to the moon, "the next key step in returning astronauts to the moon and eventually going on to Mars," Jeff Zotti, the RS-25 program director at Aerojet Rocketdyne said during the news conference. NASA's SLS program manager John Honeycutt agreed.

"This powerful rocket is going to put us in a position to be ready to support the agency in the country's deep space mission to the moon and beyond," he said.

An anonymous reader quotes a report from NBC News: Data released Thursday by the National Oceanic and Atmospheric Administration, or NOAA, showed that 2020 now ranks as the second-hottest year, with average temperatures hitting 58.77 degrees Fahrenheit -- a mere 0.04 degrees cooler than 2016, which holds the record. The Northern Hemisphere experienced its hottest year on record, surpassing the 20th century average by 2.3 degrees, according to NOAA. Oceans were also "exceptionally warm" last year, with record-high sea surface temperatures logged across parts of the Atlantic, Pacific and Indian oceans.

Above-average temperatures also shrank Arctic sea ice to near record lows, NOAA scientists said. Satellite observations revealed that Arctic sea ice in 2020 covered an average of 3.93 million square miles, tying 2016 for the smallest on record. Though NOAA has designated 2020 as the second-hottest year since record-keeping began in 1880, there are some discrepancies among other agencies that conduct similar measurements. A NASA analysis found that global average surface temperatures in 2020 tied with 2016, while the World Meteorological Organization still has 2016 in the lead. The discrepancies among these groups owe to subtle differences in how they account for data gaps over parts of the planet that lack reliable weather stations, such as in the polar regions or over wide swaths of the ocean. But experts say these small differences are inconsequential against the broader backdrop of global warming. The planet's seven warmest years on record have all been since 2014, according to NOAA, with 10 of the warmest years occurring since 2005.

An anonymous reader shares a report: While we might think of space as a vast sea of blackness, all we have to do is look up at night to see that it's punctuated by countless stars, galaxies and even a few planets visible to the naked eye. Scientists recently used data from NASA's New Horizons mission out beyond Pluto to measure just how dark the cosmic background really is. What they found has implications for what we thought we knew about the makeup of the entire universe. In short, space is so dark there can't be as many galaxies out there, adding their faint glow to the backdrop, as astronomers have previously estimated.

"It's an important number to know -- how many galaxies are there?" Marc Postman of the Space Telescope Science Institute said in a statement Tuesday. "We simply don't see the light from 2 trillion galaxies." That was the earlier estimate derived from Hubble Space Telescope observations, but a new study forthcoming in the Astrophysical Journal and co-authored by Postman suggests the total number of galaxies in the universe is probably in the hundreds of billions rather than the trillions. Interestingly, this is closer to an even earlier figure guessing there were around 200 billion galaxies. That was based on Hubble data from the 1990s.

NASA's InSight lander on Mars and the Juno orbiter at Jupiter have new leases on life. From a report: The spacecraft are expected to continue gathering data about their respective planetary targets during their newly extended missions, allowing scientists to learn more about seismic activity on Mars and turn their attention to the moons of Jupiter. Juno's mission has been extended to September 2025 or whenever its life ends with a crash into Jupiter's atmosphere. InSight will continue its mission to study Mars' geology and seismic activity from the Martian surface through December 2022. Both missions are expected to make good use of their extended time at Jupiter and Mars. InSight's extra two years will see the spacecraft collect more data on marsquakes to help create a long-term dataset that scientists can refer to for years to come, according to NASA. Juno will broaden the scope of its studies to observe Jupiter's rings and moons including flybys of Ganymede, Europa and Io.

"An enormous black hole keeps slipping through astronomers' nets..." reports Space.com: The big galaxy at the core of the cluster Abell 2261, which lies about 2.7 billion light-years from Earth, should have an even larger central black hole — a light-gobbling monster that weighs as much as 3 billion to 100 billion suns, astronomers estimate from the galaxy's mass. But the exotic object has evaded detection so far. For instance, researchers previously looked for X-rays streaming from the galaxy's center, using data gathered by NASA's Chandra X-ray Observatory in 1999 and 2004. X-rays are a potential black-hole signature: As material falls into a black hole's maw, it accelerates and heats up tremendously, emitting lots of high-energy X-ray light. But that hunt turned up nothing.

Now, a new study has conducted an even deeper search for X-rays in the same galaxy, using Chandra observations from 2018... But the Chandra data didn't reveal any significant X-ray sources, either in the galactic core or in big clumps of stars farther afield. So the mystery of the missing supermassive black hole persists.

That mystery could be solved by Hubble's successor — NASA's big, powerful James Webb Space Telescope, which is scheduled to launch in October 2021. If James Webb doesn't spot a black hole in the galaxy's heart or in one of its bigger stellar clumps, "then the best explanation is that the black hole has recoiled well out of the center of the galaxy," NASA officials wrote.

"Axiom Space has announced that it is creating an office park and manufacturing center at the Houston SpacePort at Ellington Field," notes an opinion piece for The Hill by Houston-based space writer Mark R. Whittington.

"The development is a hopeful sign that, despite foot dragging by Congress, a commercial replacement for the International Space Station may well happen." The United States has a chance to avoid a "space gap" when the ISS reaches the end of its operational life, like the one that happened between the end of the space shuttle program and the first launch of the SpaceX commercial crew Dragon mission. When Jim Bridenstine became NASA administrator, one of the questions confronting him was what to do about maintaining a presence in low Earth orbit after the ISS. The idea that he and experts at NASA have been pushing is to encourage private companies to build their own space station.

NASA would provide needed support by pledging to become an anchor tenant for such orbiting facilities. However, the commercial space stations would also have to find private customers. The problem is that Congress has been remarkably stingy when it comes to putting up real money for this approach. The fiscal 2020 budget request included $150 million for commercial space stations. Congress funded support for private orbiting labs for a grand total of $15 million...

Axiom Space has won the nod to attach one of its own modules to the ISS. Not waiting for Congress to cough up funding for NASA, Axiom has announced a facility to manufacture space station modules at the Ellington SpacePort in Houston. The company will also have private astronaut training facilities. Besides employing 1,000 people, the new Axiom facility represents a commitment to creating a commercial space station industry... It is also likely no accident that the Axiom facility is about a five-hour drive from the growing SpaceX spaceport in Boca Chica near the southern tip of Texas. No doubt SpaceX CEO Elon Musk would be pleased to launch finished modules to space, using the mighty Starship rocket, and later crews and cargo.

In the midst of a pandemic, part of a space future is taking shape in South Texas. This time it's being driven by the private sector. NASA had best jump on board or risk being left behind.

America's next president takes office in three weeks and two days. What changes should he make to America's space program? An opinion writer at Bloomberg tackles the question: Donald Trump badly wanted to be the president who sent Americans back to the moon. Instead, his administration has presided over Artemis, a lunar-landing program plagued by "uncertain plans, unproven cost assumptions, and limited oversight," according to a new watchdog report. Pieces of the program, including the SLS rocket and Orion spacecraft, are billions of dollars over budget, years past deadline and poised to eat into NASA's more promising projects. As a result, the U.S. space agency will almost certainly miss its goal of landing Americans on the moon again by 2024. President-elect Joe Biden inherits the task of deciding what to do next.

- He should focus on what has made the U.S. space program distinctive in recent years: the power of private competition...

- The government bears all the risk of missed deadlines and rising costs. A more efficient alternative is fixed-price contracts, in which a company keeps as profit whatever's left over after it completes its assigned task. Beginning in 2006, NASA has used such contracts to boost the development of private space companies capable of reaching the International Space Station. The initiative has worked far better than anyone could've expected. In a 2011 report, NASA expressed bewilderment that SpaceX, then a young upstart, managed to develop its workhorse Falcon 9 rocket for just $390 million — as opposed to a likely cost of $1.7 billion to $4 billion under traditional cost-plus assumptions. Today, the rocket delivers hardware and astronauts for companies and space agencies around the world. Come January, the Biden administration should take a similar approach to the troubled Artemis system. Step one should be eliminating SLS and Orion altogether in favor of cheaper private-sector alternatives....

Currently, there are a number of Artemis elements being developed under fixed-price contracts, including future lunar landers. The new administration should use a similar approach with as many aspects of the project as possible, thereby harnessing the efficiency and inventiveness of private competition.

Long-time Slashdot reader fahrbot-bot summarizes an article from LiveScience: There's a giant asteroid somewhere out in the solar system, and it hurled a big rock at Earth.

The evidence for this mystery space rock comes from a diamond-studded meteor that exploded over Sudan in 2008. NASA had spotted the 9-ton (8,200 kilograms), 13-foot (4 meters) meteor heading toward the planet well before impact, and researchers showed up in the Sudanese desert to collect an unusually rich haul of remains. Now, a new study of one of those meteorites suggests that the meteor may have broken off of a giant asteroid — one more or less the size of the dwarf planet Ceres, the largest object in the asteroid belt — that formed in the presence of water under intermediate temperatures and pressures.

The mineral makeup of these space rocks offers clues about the "parent asteroid" that birthed a given meteor, researchers said in a statement.

America's Federal Aviation Agency signed an agreement with the state of Kansas's department of transportation to establish a 770-nautical mile Kansas Supersonic Transportation Corridor for testing aircraft up to Mach 3, reports Aviation International News: The agreement would provide a critical testing site for the emerging group of supersonic aircraft as civil supersonic flight remains banned over land. Flight testing for models such as Aerion's AS2 and Boom's Overture is expected this decade, while NASA noise trials with the Lockheed Martin X-59 demonstrator are anticipated by 2024. "This year marks 73 years since Chuck Yeager broke the sound barrier, and with this supersonic flight corridor Kansas will have a unique role in the next generation of supersonic transportation," said Sen. Jerry Moran (R-Kansas) in the announcement of the agreement...

The General Aviation Manufacturers Association (GAMA) lauded the establishment of the corridor, saying it will help in the "re-birth" of civil supersonic travel. "The Kansas Supersonic Transportation Corridor will assist in the assessment of sound mitigating structural and engine designs as well as state of the art atmospheric acoustic modeling that eliminates the sonic boom and shapes the noise signature of an aircraft traveling faster than the speed of sound to a very low volume rumble," said GAMA president and CEO Pete Bunce. "The validation of these technological breakthroughs through the use of sophisticated ground acoustic and telemetry sensors will provide the necessary data to assist global regulators and policymakers in modernizing supersonic flight policies."

NASA plans to use the Lockheed Martin X-59 demonstrator to test low-boom noise effects over various populations. "I'm really excited about quiet supersonic technology and its ability to be transformative for flight and our economy," said NASA Administrator Jim Bridenstine.

Aerion, meanwhile, plans to test "Boom Cruise" technology that is designed to keep the sonic boom from reaching the ground with plans to begin flight trials in 2025, while Boom is looking at low boom technologies for its commercial airliner Overture.

Jupiter and Saturn will appear as a double planet in the night sky Monday evening thanks to a rare planetary alignment known as a "great conjunction." Axios explains how to see it: In order to see the two planets, step outside under clear skies not long after sundown and look to the southwest. Jupiter will look brighter than Saturn and will appear just above the ringed planet. If you hold out your hand to the sky, the tip of your pinky will be able to cover both planets at once, according to NASA. The two planets will be bright enough to see from most cities. For those interested, NASA has a dedicated article on how to photograph the conjunction.

"A new satellite from Capella Space was described as "pretty creepy" by Bustle's technology site Input: Like other hunks of metal currently orbiting Earth, the Capella-2 satellite's onboard radar system makes it capable of producing ludicrously high-resolution visuals from its data. More unconventional is the service Capella has launched to match: the government or private customers can, at any time, request a view of anything on the planet that's visible from the sky...

The Capella-2's system of cameras and sensors is nothing short of magnificent. The satellite uses something called Synthetic Aperture Radar (SAR), a technology used by NASA since the 1970s, to detect the Earth's surface through even the densest of clouds. SAR sends a 9.65 GHz radio signal toward the Earth and interprets the signal as it returns, using that data to form a visual... The Capella-2 is now the highest-resolution commercial SAR satellite in the world, capable of 50 cm x 50 cm resolution imaging. Other satellites are only capable of resolution up to about five meters....

Once Capella's full squadron of satellites is airborne, the company will have the ability to quickly snap views of just about any place in the world. That power could quickly be abused if left unchecked.
The article notes Capella already has a contract with the U.S. Air Force, adding "It's not much of a stretch to imagine high-resolution SAR technology turning into a tool for national surveillance...

"Right now there's just one Capella-2 satellite roaming around in the atmosphere, so that functionality is somewhat limited. Capella plans to launch six additional satellites with similar capabilities in the next year."

In response on Friday Capella Space penned a blog post reminding readers that their satellite "does not see through buildings," and that at 50-centimeter resolution "What it cannot do...is see people, license plates or reveal any personally identifiable information. Unlike other technologies that have recently been under scrutiny for privacy infringement such as cell phone geolocation data or automatic license plate readers, SAR imaging specializes in a macro view of the world to see the general patterns of life.

"Our company was founded on the belief that technology in space can significantly benefit life on Earth, and invading privacy does not help that mission. Part of that also means thoroughly vetting our customers and partners to ensure they will use our information for ethical purposes."

Slashdot reader destinyland writes: The U.S. Space Force celebrated its one-year anniversary Friday with a new announcement: that members of this branch of the military will be referred to as "guardians." They're describing it as "A name chosen by space professionals, for space professionals." The site Space.com notes that the phrase is a nod to the original long-standing "Space Command" branch of the Air Force (founded in 1982), whose motto had been "Guardians of the High Frontier."

In other news, the Space Force now has one member who is actually in outer space — astronaut Michael Hopkins. Launched by SpaceX to the International Space Station in the Crew-1 capsule, Hopkins agreed to join the Space Force in a ceremony in space which a Space Force official said would "spotlight the decades-long partnership" between NASA and America's Defense Department (which oversees its armed forces).

NASA Administrator Jim Bridenstine pointed out that 60% of the astronaut corps comes from the military, according to Space.com, which adds that "At least one other member of NASA's active astronaut corps, Air Force Col. Nick Hague, has also requested to transfer to the Space Force."

On Monday, December 21, Jupiter and Saturn will merge in the night sky in an astronomical event known as a "Great Conjunction," appearing closer to one another than they have since Galileo's time in the 17th century. NASA reports: The planets regularly appear to pass each other in the solar system, with the positions of Jupiter and Saturn being aligned in the sky about once every 20 years. What makes this year's spectacle so rare, then? It's been nearly 400 years since the planets passed this close to each other in the sky, and nearly 800 years since the alignment of Saturn and Jupiter occurred at night, as it will for 2020, allowing nearly everyone around the world to witness this "great conjunction."

The closest alignment will appear just a tenth of a degree apart and last for a few days. On the 21st, they will appear so close that a pinkie finger at arm's length will easily cover both planets in the sky. The planets will be easy to see with the unaided eye by looking toward the southwest just after sunset. From our vantage point on Earth the huge gas giants will appear very close together, but they will remain hundreds of millions of miles apart in space. And while the conjunction is happening on the same day as the winter solstice, the timing is merely a coincidence, based on the orbits of the planets and the tilt of the Earth.

For those who would like to see this phenomenon for themselves, here's what to do:

- Find a spot with an unobstructed view of the sky, such as a field or park. Jupiter and Saturn are bright, so they can be seen even from most cities.
- An hour after sunset, look to the southwestern sky. Jupiter will look like a bright star and be easily visible. Saturn will be slightly fainter and will appear slightly above and to the left of Jupiter until December 21, when Jupiter will overtake it and they will reverse positions in the sky.
- The planets can be seen with the unaided eye, but if you have binoculars or a small telescope, you may be able to see Jupiter's four large moons orbiting the giant planet.

An anonymous reader shares an investigative report by LA Times: The plane had begun its descent into Boston. Inside the cockpit, the captain was slumped in his seat. Sitting beside him, copilot Eric Tellmann was starting to pass out. Tellmann managed to strap on his oxygen mask, then grabbed the captain's arm and forced him to follow suit. Reviving slowly, the captain looked at Tellmann through his mask, and his eyes grew wide with fear. A strange smell had permeated the plane that day. Passengers and flight attendants were coughing and wiping teary eyes. The pilots briefly lifted their masks and could still smell the odor as the runway drew nearer. Tellmann and the captain parked the Airbus A319 at the gate. But they had no memory of landing or taxiing Spirit Airlines Flight 708. Tellmann went to the hospital for treatment and spent the next week at home in bed, vomiting and shaking and feeling "like a freight train had run over us," he said in a letter to his union about the July 2015 event. A mysterious smell. Strange symptoms. A trip to the emergency room. The signs were all there: Something had gone seriously wrong with the plane's air supply.

The air you breathe on airplanes comes directly from the jet engines. Known as bleed air, it is safe, unless there is a mechanical issue -- a faulty seal, for instance. When that happens, heated jet engine oil can leak into the air supply, potentially releasing toxic gases into the plane. For decades, the airline industry and its regulators have known about these incidents -- called fume events -- and have maintained that they are rare and that the toxic chemical levels are too low to pose serious health risks. But a Times investigation found that vapors from oil and other fluids seep into planes with alarming frequency across all airlines, at times creating chaos and confusion: Flight attendants vomit and pass out. Passengers struggle to breathe. Children get rushed to hospitals. Pilots reach for oxygen masks or gasp for air from opened cockpit windows. Such events are documented in airport paramedic records, NASA safety reports, federal aviation records and other filings reviewed by The Times. Tellmann, the Spirit Airlines pilot, was one of hundreds of airline crew members and passengers who reported being sickened or impaired on flights in recent years. A Times analysis of NASA safety reports from January 2018 to December 2019 identified 362 fume events that airline crew members reported to the agency, with nearly 400 pilots, flight attendants and passengers receiving medical attention. During at least 73 of those flights, pilots used emergency oxygen. Four dozen pilots were described as impaired to the point of being unable to perform their duties. Because they're made voluntarily, the NASA safety reports are the "tip of the iceberg," according to a recent study by a researcher from the National Institute for Occupational Safety and Health.

schwit1 shares a report from Ars Technica: Since that time, according to The Planetary Society's Casey Dreier, NASA has spent $23.7 billion developing the Orion spacecraft. This does not include primary costs for the vehicle's Service Module, which provides power and propulsion, as it is being provided by the European Space Agency. For this money, NASA has gotten a bare-bones version of Orion that flew during the Exploration Flight Test-1 mission in 2014. The agency has also gotten the construction of an Orion capsule -- which also does not have a full life support system -- that will be used during the uncrewed Artemis I mission due to be flown in 12 to 24 months. So over its lifetime, and for $23.7 billion, the Orion program has produced:

- Development of Orion spacecraft
- Exploration Flight Test-1 basic vehicle
- The Orion capsule to be used for another test flight
- Work on capsules for subsequent missions

Obviously, that is not nothing. But it is far from a lot, even for a big government program. To see how efficiently this money could theoretically have been spent, let's use an extreme example. SpaceX is generally considered one of the most efficient space companies. Founded in 2002, the company has received funding from NASA, the Department of Defense, and private investors. Over its history, we can reliably estimate that SpaceX has expended a total of $16 billion to $20 billion on all of its spaceflight endeavors. Consider what that money has bought:

- Development of Falcon 1, Falcon 9, and Falcon Heavy rockets
- Development of Cargo Dragon, Crew Dragon, and Cargo Dragon 2 spacecraft
- Development of Merlin, Kestrel, and Raptor rocket engines
- Build-out of launch sites at Vandenberg (twice), Kwajalein Atoll, Cape Canaveral, and Kennedy Space Center
- 105 successful launches to orbit
- 20 missions to supply International Space Station, two crewed flights
- Development of vertical take off, vertical landing, rapid reuse for first stages
- Starship and Super Heavy rocket development program
- Starlink Internet program (with 955 satellites on orbit, SpaceX is largest satellite operator in the world)

To sum up, SpaceX delivered all of that for billions of dollars less than what NASA has spent on the Orion program since its inception.