Embedded below the fold in two parts.
To listen to all of John Batchelor’s podcasts, go here.
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An evening pause: The yacht, the Tally Ho, had won an important race in 1927 in Great Britain. The goal is to get this work done so it can compete in 2027 in a similar race in Britain that it won one hundred years previously.
Though after watching the video, it seems this is more like a complete rebuild from scratch rather than a restoration.
Hat tip Cotour.
Courtesy of BtB’s stringer Jay. This post is also an open thread. I welcome my readers to post any comments or additional links relating to any space issues, even if unrelated to the links below.
Jay notes correctly that China has apparently dropped a planned mission to Uranus, listed in a similar presentation in February 2023. The schedule has for all these missions also been pushed back significantly.
Protest against Hamas, in Gaza
In what might signal a major turning point in Israel’s war against Hamas, many hundreds of Gazans earlier this week marched through the ruins protesting against Hamas quite publicly and apparently with no fear.
Hundreds of Gazans marched through the northern town of Beit Lahiya carrying white flags and chanting anti-Hamas slogans, according to videos posted from the scene, which showed participants calling for peace, press coverage, and the release of hostages.
In a rare public uprising against Hamas rule in Gaza, demonstrators took to the streets outside the Indonesian Hospital in northern Gaza. Footage shared on social media on Tuesday captured a crowd of protesters demanding an end to what they called “tyrant rule,” with chants of “Out, out, out! Hamas out!” and “We want to live!” echoing through the streets.
The images to the right are a screen capture from this video. The tweet claims thousands participated in this protest, with chants of “Down with Hamas, we’ve had enough, Hamas!”
Hamas has controlled Gaza for almost two decades. In that time any hint of protest against it has been routinely met quickly with brutal and violent retaliation. It now appears however that its power within Gaza has been severely damaged by Israel’s aggressive war, killing one leader after another with amazing efficiency.
Recently for example I have noticed in watching videos posted by Hamas supposedly showing Gazans cheering its effort, that if you look closely at the people in the crowd, many do not appear to be enthusiastic or supportive. Instead, these so-called Hamas supporters often have appeared sullen, joining the chants reluctantly almost out of fear.
These new protests against Hamas I think give us a better sense of the situation. Even though there is ample evidence that until recently Gazans of all stripes supported Hamas and were willing to eagerly aid it in its terrorist acts of murder, rape, and torture, it appears that Hamas’s failures in the war are finally taking their toll on its popularity.
These protests are a great opportunity for Israel, if it moves fast. If it can find and identify these protesters, especially their leaders, and protect them, it will further isolate Hamas and make its destruction more likely. It will also sow the seeds of a new leadership in Gaza that might actually be willing to live in peace with Israel.
Capitalism in space: The main reason President Trump got the Space Force established in his first term was because the Air Force resisted rethinking its space military operations. It insisted on building large government-built satellites that took years to complete and always went overbudget and behind schedule.
The creation of the Space Force gave new people the ability to push for a major change, switching to the capitalism model whereby the government designed and built nothing but instead acted as a customer buying what it needed from the private sector. In addition, it allowed a major shift from those big satellites — easy targets for destruction — to the large private constellations of many small satellites, cheap to build and launch and difficult for other militaries to take out.
The Space Force — in order to protect the satellite companies it hires to build these satellites — has now announced that it will no longer publish the names of those companies.
The U.S. Space Force plans to keep the names of commercial companies participating in its new space reserve program under wraps, aiming to protect them from potential adversary threats as commercial satellites play a growing role in military operations.
Col. Richard Kniseley, director of the Space Force’s Commercial Space Office, said companies signing agreements under the Commercial Augmentation Space Reserve (CASR) program can disclose their participation but are not required to. “That potentially puts a target on their back,” Kniseley told SpaceNews, underscoring the risk to private-sector firms providing space-based services during wartime.
Under this program, the Space Force has already signed contracts with four satellite companies, but the names remain undisclosed.
Though there is some logic to this decision, it carries great risk of corruption and misbehavior. Almost every time government bureaucrats and private companies are allowed to work in secret we routinely see kickbacks, bribery, and contract payoffs. And don’t expect congressional oversight to prevent such things, since there is now ample evidence from DOGE that our federal lawmakers have been quite willing to take their own payoffs to allow such corruption to prosper.
The switch to capitalism by the Pentagon is unquestionably a good thing. It will get more done for less. Letting it act in secrecy is a mistake however. Better to live with the risk of attack than allow our government and the companies it issues big money contracts to do things behind closed doors.
The Parker Solar Probe on March 22, 2025 successfully completed its 23rd close fly-by of Sun, matching the distant and speed records set by its previous fly-by in December 2024.
NASA’s Parker Solar Probe completed its 23rd close approach to the Sun on March 22, equaling its own distance record by coming within about 3.8 million miles (6.1 million kilometers) of the solar surface. The close approach (known as perihelion) occurred at 22:42 UTC — or 6:42 p.m. EDT — with Parker Solar Probe moving 430,000 miles per hour (692,000 kilometers per hour) around the Sun, again matching its own record.
Actual science data won’t be downloaded from the spacecraft for several weeks, but it has sent back a signal that it is in good shape and operating as expected.
Click for original image.
Astronomers using the Webb Space Telescope have captured the first infrared images of the aurora of Neptune, confirming that the gas giant produces this phenomenon.
The picture to the right combines infrared data from Webb and optical imagery from the Hubble Space Telescope. The white splotches near the bottom of the globe are clouds seen by Hubble. The additional white areas in the center and near the top are clouds detected by Webb, while the greenish regions to the right are aurora activity detected by Webb.
The auroral activity seen on Neptune is also noticeably different from what we are accustomed to seeing here on Earth, or even Jupiter or Saturn. Instead of being confined to the planet’s northern and southern poles, Neptune’s auroras are located at the planet’s geographic mid-latitudes — think where South America is located on Earth.
This is due to the strange nature of Neptune’s magnetic field, originally discovered by Voyager 2 in 1989, which is tilted by 47 degrees from the planet’s rotation axis. Since auroral activity is based where the magnetic fields converge into the planet’s atmosphere, Neptune’s auroras are far from its rotational poles.
The data also found that the temperature of Neptune’s upper atmosphere has cooled significantly since it was first measured by Voyager 2 in 1989, dropping by several hundred degrees.
Proposed spaceports surrounding Norwegian Sea
The German rocket startup Isar Aerospace, forced to scrub the first launch of its Spectrum rocket from Norway’s Andoya spaceport several times this week due to high winds, is now targeting a launch tomorrow, March 27, 2025, at 7:30 am (Eastern).
Munich-based Isar Aerospace postponed the debut launch of its Spectrum rocket, citing unfavorable winds at Norway’s Andøya Spaceport. On Tuesday, Isar said it will now target Thursday at 7:30 a.m. EDT for the highly anticipated test flight, which could pave the way for a more robust European presence in the commercial space industry.
The mission will not have a payload—rather, it will serve as the first integrated test of all rocket systems. And no matter what happens, Isar said it will view the test as a success.
…Standing about 92 feet tall with a diameter of about 6 feet, Spectrum is designed to carry payloads of up to 2,200 pounds to low Earth orbit. The two-stage vehicle burns 40 tons of liquid oxygen and propane across its nine first-stage Aquila engines and single second-stage engine. Unlike Falcon 9, though, the vehicle is not reusable, which is what allowed SpaceX to lower launch costs and take command of the market.
Isar’s goal is to eventually produce up to 40 Spectrum vehicles annually at its facility near Munich. Per Metzler, it builds nearly all components in house and is already producing two more rockets. The company is operating with about $435 million in funding from private investors as well as the NATO Innovation Fund and German government.
If successful, Isar will win the race to become the first new private rocket company from Europe to get to orbit. The launch will also inaugurate orbital operations from Andoya, giving Norway the first commercial spaceport in Europe, beating out both of the UK’s proposed spaceports that had begun work much earlier.
Click for original image.
A survey of the protoplanetary disks in a star-forming region about 400 light years from Earth has found that the size of the disks can vary considerably, with many much smaller than our own solar system.
Using ALMA [Atacama Large Millimeter/submillimeter Array in Chile], the researchers imaged all known protoplanetary discs around young stars in Lupus, a star forming region located about 400 light years from Earth in the southern constellation Lupus. The survey reveals that two-thirds of the 73 discs are small, with an average radius of six astronomical units, this is about the orbit of Jupiter. The smallest disc found was only 0.6 astronomical units in radius, smaller than the orbit of Earth.
…The small discs were primarily found around low-mass stars, with a mass between 10 and 50 percent of the mass of our Sun. This is the most common type of star found in the universe.
You can read the research paper here [pdf]. The image to the right, figure 1 from the paper, shows 71 of those disks, with two-thirds clearly much smaller than our solar system.
Because exoplanet surveys have found many small exoplanets around low-mass stars, this new data suggests that planets can also form from these small accretion disks, and that planet formation is also ubiquitous throughout the universe.
Rocket Lab today successfully launched eight satellites for German company OroraTech and its commercial constellation for monitoring wildfires, its Electron rocket lifting off from one of its two launchpads in New Zealand.
The leaders in the 2025 launch race:
34 SpaceX
14 China
5 Rocket Lab
4 Russia
SpaceX still leads the rest of the world in successfully launches, 34 to 26.
This is not the last launch expected today. Both China and SpaceX plan launches, with the Chinese launch scheduled to have occurred already. More information to follow as it becomes available.
Courtesy of BtB’s stringer Jay. This post is also an open thread. I welcome my readers to post any comments or additional links relating to any space issues, even if unrelated to the links below.
According to Space News, NASA officials have now confirmed a DOGE post that described contract cancellations totaling about $420 million.
In a statement to SpaceNews late March 24, NASA press secretary Bethany Stevens confirmed a post by the Department of Government Efficiency (DOGE) that NASA had terminated about $420 million in “unneeded” contracts. “NASA is committed to optimizing its workforce and resources in alignment with the Department of Government Efficiency’s initiatives. As part of this effort, NASA has identified and phased out $420 million in contracts that were determined to be redundant or misaligned with our core mission priorities,” Stevens said in the statement.
…NASA did not answer questions about specific contracts selected for termination or details about how it determined those contracts were redundant or misaligned. The DOGE post, published just before midnight March 21, said only that it included three contracts worth $15 million each to consultancies for “Change Management Support Services.”
Though it is not yet clear what specific contracts were cancelled, the statements from both NASA and DOGE, as well as the research by Space News‘s own reporter, suggest strongly these contracts had nothing to do with space or aviation engineering, but were related to management and DEI related projects, all of which have nothing to do with NASA’s “core mission priorities.”
As always, the Space News genuflects to the swamp, implying these cuts are the precursor to the utter destruction of NASA’s science research. In truth, NASA — like all government agencies in the 21st century — is bloated and wasteful. There is plenty of room for cuts, without doing any harm to the work the agency does. If anything, by getting rid of the waste the agency will be more efficient, able to do science and engineering research more effectively.
Click for original image.
Cool image time! The picture to the right, cropped, reduced, and sharpened to post here, was taken on January 24, 2025 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). Labeled simply as a “terrain sample,” it was likely taken not as part of any specific research request but to fill a gap in the schedule in order to maintain the camera’s proper temperature.
In this case the camera team got something quite intriguing. The entire terrain is reminiscent of stucco found on the outside walls of southwest homes. What makes even more intriguing is that the stucco appears to be material that has covered the terrain, based on the two craters that appear half-buried by it. Moreover, this picture only captures a small portion of this landscape, which extends like this over an area approximately 40 miles squared.
What caused this strange terrain? As always, the overview map below provides a clue, though no firm answers.
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The uncertainty of science: Scientists analyzing material drilled out by the Mars rover Curiosity back in 2013 now believe the sample included the largest carbon molecules yet found on Mars.
The detection of these long and large carbon molecules was based not on actual Martian data, taken at a site dubbed Cumberland on the floor of Gale Crater, but on follow-up lab work on Earth.
The recent organic compounds discovery was a side effect of an unrelated experiment to probe Cumberland for signs of amino acids, which are the building blocks of proteins. After heating the sample twice in [the Curiosity] SAM’s oven and then measuring the mass of the molecules released, the team saw no evidence of amino acids. But they noticed that the sample released small amounts of decane, undecane, and dodecane [thought to be fragments of fatty acids].
Because these compounds could have broken off from larger molecules during heating, scientists worked backward to figure out what structures they may have come from. They hypothesized these molecules were remnants of the fatty acids undecanoic acid, dodecanoic acid, and tridecanoic acid, respectively.
The scientists tested their prediction in the lab, mixing undecanoic acid into a Mars-like clay and conducting a SAM-like experiment. After being heated, the undecanoic acid released decane, as predicted. The researchers then referenced experiments already published by other scientists to show that the undecane could have broken off from dodecanoic acid and dodecane from tridecanoic acid.
Based on this Earth lab work, the scientists now suggest that Mars could also have these much longer carbon molecules that are associated with biological processes.
Very intriguing, but we must exercise caution. Curiosity did not detect such molecules, only evidence that they might exist on Mars. And even if they do exist on Mars, this is not evidence that Mars has or once had biological life. While such large molecules on Earth are usually associated with biological processes, they do not have to be, as the scientists readily admit in their abstract. Furthermore, in the alien environment of Mars there could be many non-biological processes we don’t even yet understand that could explain their existence.
Blue Ghost 3 landing site
Firefly yesterday announced that it has awarded the Blue Origin subsidiary Honeybee Robotics a contract to build a rover for its third Blue Ghost mission to the Moon.
Firefly Aerospace and Honeybee Robotics, a Blue Origin company, today announced Honeybee was contracted by Firefly to provide the lunar rover for the company’s recently awarded NASA task order to explore the Gruithuisen Domes on the Moon’s near side in 2028. Once deployed on the Moon by Firefly’s Blue Ghost lander, Honeybee’s rover will carry NASA instruments to investigate the unique composition of the Gruithuisen Domes.
The funding for this rover actually comes from NASA, awarded first to Firefly which has in turn given a subcontract to Honeybee.
Before this 2028 mission however Firefly will launch its second Blue Ghost mission to the Moon, targeting a 2026 launch date. That second mission will not only land on the far side of the Moon, it will also deploy two lunar orbiters, one for European and the second Firefly’s own orbital tug for these spacecraft that will also service as a communications satellite after deployment.
The European Space Agency (ESA) yesterday announced a new competitive award program, dubbed the European Launcher Challenge, designed to give contracts to new European rocket startups to help them develop their own rockets.
Proposals are due no later than May 5, 2025. The program will award up to $183 million to each company, depending on its application. The program has two components, one for rockets that will serve government contracts and will launch beginning in 2026, and the second for rockets that are upgraded by 2028. In both cases a company must complete a demonstration launch by 2027 to qualify for any award. More details here.
Essentially, ESA is structuring this program to provide free subsidies to those companies it decides it likes, with anywhere from two to three getting awards. In January six rocket startups — HyImpulse, Latitude, MaiaSpace, Orbex, Rocket Factory Augsburg and The Exploration Company — submitted a joint letter to ESA endorsing the program and outlining how they think the program should be structured.
Interestingly, the two rocket startups did not sign that letter, Isar Aerospace from Germany and PLD from Spain. Of all these companies, these two are actually closest to launch, with Isar about to attempt its first launch and PLD having already completed a suborbital test flight and building its launch sites in French Guiana and Duqm, Oman.
Officials at PLD are quoted here as apparently opposed to this ESA award program.
“We need to let the market select a winner,” Raúl Verdú, co-founder and chief business development officer of the company, said at the January conference. “Today, to be very honest, it is super-hard to select who will be the winner.”
It will be interesting to see this government program play out. Right now it appears designed to play favorites, a typical European approach. There is a good chance however that it will not do this, and will instead succeed in jumpstarting an independent, competitive European rocket industry. The program’s main structure remains sound, truly capitalistic, whereby the government owns nothing and simply acts as a customer, buying rockets from competing companies on the open market.
Courtesy of BtB’s stringer Jay. This post is also an open thread. I welcome my readers to post any comments or additional links relating to any space issues, even if unrelated to the links below.
SpaceX today successfully placed a classified reconnaissance payload into orbit for National Reconnaissance Office, its Falcon 9 rocket lifting off from Cape Canaveral in Florida.
The first stage completed its second flight, landing back at Cape Canaveral.
The leaders in the 2025 launch race:
34 SpaceX
14 China
4 Russia
4 Rocket Lab
SpaceX now leads the rest of the world in successfully launches, 34 to 25.
Click for original image.
Cool image time! The false-color infrared image to the right, cropped, reduced, and sharpened to post here, was taken by the Webb Space Telescope of the outflow from a baby star, dubbed Herbig-Haro 49/50, located about 625 light years away.
The picture was taken to get a better understanding of the flow itself. Earlier infrared images at much lower resolution by the Spitzer Space Telescope had left many features in this outflow unclear. For example, at the head of the outflow the Spitzer infrared image was unable to clearly identify the background spiral galaxy located there. In those earlier images it could have instead been a part of the outflow itself.
The galaxy that appears by happenstance at the tip of HH 49/50 is a much more distant, face-on spiral galaxy. It has a prominent central bulge represented in blue that shows the location of older stars. The bulge also shows hints of “side lobes” suggesting that this could be a barred-spiral galaxy. Reddish clumps within the spiral arms show the locations of warm dust and groups of forming stars. The galaxy even displays evacuated bubbles in these dusty regions
The actual source from which this flow comes remains unconfirmed, though astronomers think the source is one particular protostar about 1.5 light years away.
Jared Isaacman
This article from Rolling Stone published yesterday provides a wealth of new information about Jared Isaacman, Trump’s still unconfirmed pick to become NASA’s next administrator.
Two key details: First, the article quotes Isaacman saying he opposes NASA’s policy of signing up two companies, SpaceX and Blue Origin, to build manned lunar landers.
I will try to help, but this is why I get frustrated at two lunar lander contracts, when will be lucky to get to the [Moon] a few times in the next decade. People falsely assume its because I want SpaceX to win it all, but budgets are not unlimited & unfortunate casualties happen.
In other words, he opposes using NASA to develop an aerospace industry with multiple companies capable of doing things NASA needs done. He also appears to dismiss the value of redundancy that two landers provides.
Second, the article provides links to the financial [pdf] and ethics [pdf] disclosures that he submitted to the government after being named as nominee. In the financial statement he indicates he paid SpaceX more than $50 million for providing the transportation for his multi-mission Dragon/Starship Polaris Dawn manned program. In the ethics statement he asserts he would end that contract if confirmed as NASA administrator, with SpaceX refunding any monies for services not yet rendered. The program itself would be suspended until Isaacman completes his term as administrator.
The Rolling Stone article, though detailed and fair-minded, appears to strongly endorse Isaacman, and thus joins a growing public campaign from many insider Washington players — a large number of whom have been passionately hostile to Donald Trump — to get Isaacman approved. At the moment however his nomination appears stalled because the Trump administration has not yet submitted to the Senate the paperwork needed to allow that body to schedule hearings.
The strange campaign by many of Trump’s opponents to endorse Isaacman continues to suggest to me that the Trump administration has had second thoughts about its NASA nominee. The swamp now wants him, and this is raising hackles inside the administration, which thus explains the slow-walking of his paperwork.
Click for original image.
The South Korean rocket startup Innospace has now provided some additional details about its testing of the portable launchpad and strongback that it will use on its first planned rocket launch in July 2025.
The Launch Pad-Vehicle Interface Integrated System Test comprehensively verifies the operational readiness of the launch vehicle and launch pad, covering processes from vehicle assembly and pad integration to vertical erection, propellant supply system checks, and final operational validation. During the test, INNOSPACE confirmed the mechanical and electrical interfaces between the launch pad and vehicle, the transporter erector launcher system, the detachment of the Umbilical, the fuel and oxidizer supply system, and the separation of the launch vehicle hold-down mechanism, ensuring technical reliability and operational stability.
The launch pad that successfully completed the test, is scheduled for maritime transportation to the Alcântara Space Center in Brazil on April 2. Upon arrival in May, it will undergo installation and final verification in the local environment to complete preparations for launch operations. In addition, the launch vehicle used in this test was the HANBIT-Nano Qualification Model (QM), which shares the same specifications—21.8 meters in height and 1.4 meters in diameter—as the Flight Model (FM) scheduled for launch in July.
The company will still need to do these same tests in Brazil at its Alcântara spaceport using the actual rocket, dubbed Hanbit-Nano, before the launch can occur. Thus. meeting that July target date is likely difficult if not impossible. At the same time it does appear the company has a chance of launching before the end of this year.
Click for wide shot. The original of the inset
can be found here.
In their exploration of the outer flanks of the rim of Jezero Crater, the science team operating the Perseverance rover have discovered an unusual rock different than everything around it, appearing to be made of many very tiny spherules.
The picture to the right illustrates this. The wider picture was taken by Perseverance’s left high resolution camera, with the inset a close-up mosaic of three images taken by the rover’s micro-imager, designed to get very very high resolution pictures of small objects. From the press release:
The rock, named “St. Pauls Bay” by the team, appeared to be comprised of hundreds of millimeter-sized, dark gray spheres. Some of these occurred as more elongate, elliptical shapes, while others possessed angular edges, perhaps representing broken spherule fragments. Some spheres even possessed tiny pinholes! What quirk of geology could produce these strange shapes?
This isn’t the first time strange spheres have been spotted on Mars. In 2004, the Mars Exploration Rover Opportunity spotted so-called, “Martian Blueberries” at Meridiani Planum, and since then, the Curiosity rover has observed spherules in the rocks of Yellowknife Bay at Gale crater. Just a few months ago, Perseverance itself also spied popcorn-like textures in sedimentary rocks exposed in the Jezero crater inlet channel, Neretva Vallis. In each of these cases, the spherules were interpreted as concretions, features that formed by interaction with groundwater circulating through pore spaces in the rock.
Not all spherules form this way, however. They also form on Earth by rapid cooling of molten rock droplets formed in a volcanic eruption, for instance, or by the condensation of rock vaporized by a meteorite impact.
At the moment the science team has no idea which of these theories explains the spherules. That the rock is located on the crater rim, where ejecta from the impact will be found, strongly suggests the impact was the cause, not groundwater flow.
Not surprisingly, considering Trump’s executive orders demanding all government agencies discontinue their racial and sex quotas based on the bigoted Diversity, Equity, and Inclusion (DEI) policies, NASA has now deleted any mention of launching the first “woman and person of color” on its first Artemis lunar landing mission.
The Artemis landing page of Nasa’s website previously included the words: “Nasa will land the first woman, first person of color, and first international partner astronaut on the Moon using innovative technologies to explore more of the lunar surface than ever before.” The version of the page live on the website on Friday, however, appears with the phrase removed.
During the Biden administration every single press release about this first Artemis lunar landing touted these racial and sexual qualifications, as if it was the only thing that mattered in choosing the right astronauts for the job. It was not only illegal discrimination against men and whites, it was insulting to minorities and women.
This change in language does not mean that NASA will now purposely exclude “women or people of color” from that mission. Instead, it ends the emphasis on race and sex. The astronauts NASA chooses for the flight will now be picked based on more important considerations, such as experience and talent. Picking someone because of their race or gender is like picking someone because of the color of their eyes or hair. It is stupid and misguided. Trump has now ended that stupidity.
Or at least he is forcing NASA’s management make its bigotry less obvious. We should not be surprised if that management still intends to make race and sex a major criteria. They will simply no longer blast that decision with a bullhorn.
Embedded below the fold in two parts.
To listen to all of John Batchelor’s podcasts, go here.
» Read more
Courtesy of BtB’s stringer Jay. This post is also an open thread. I welcome my readers to post any comments or additional links relating to any space issues, even if unrelated to the links below.
Click for video.
The recent string of vandalism of Tesla vehicles as well as swatting attacks on well known conservatives by leftist crazies might be scary, horrifying, and disgusting, but if you take a step back from these emotions for a second to look dispassionately at the situation, you will realize these attacks are only the dying screams of a bankrupt political movement that has no proposals, no ideas, and no goals except the obtaining of power — now through the use of violence because its political support has dropped to such record lows.
First, the attacks are beyond senseless. In the case of the vandalism of Teslas, the attacks are actually doing harm to those who in the past were most likely to have supported the Democratic Party’s leftist political agenda. Conservatives in general have not been buying electric vehicles, because they have no need to virtue signal leftist climate goals. So, by damaging Teslas owned by innocent bystanders, just because the car was built by a company founded by Elon Musk, the vandals are not only not winning converts to their cause, they are making enemies of people who were once on their side.
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Click for original image.
New research has now found that the shower of energy produced when a cosmic ray hits the atmosphere could be a major cause for the ignition of lightning in thunderheads.
You can read the paper here. The two graphs to the right are taken from figure 3 of the paper, and show two different lightning events. The colors represent time, going from green (earliest) to blue to yellow and red (latest). The white dot marks the spot where the lightning flash started. From the article above:
We believe that that most lightning flashes in thunderstorms are ignited by cosmic ray showers,” says the study’s lead author Xuan-Min Shao, a senior scientist at the Los Alamos National Laboratory in New Mexico.
…One of the important things about cosmic ray showers is that they contain antimatter–positrons as well as ordinary electrons. The Los Alamos 3D lightning maps contained strong evidence for positrons. Electrons and positrons are bent in opposite directions by Earth’s magnetic field, so they leave opposite imprints on the lightning’s polarization, which BIMAP-3D also measured.
…Positrons clinched the case for cosmic rays. “The fact that a cosmic ray shower provides an ionized path in the cloud that otherwise lacks free electrons strongly favor the inference that most lightning flashes are ignited by cosmic rays,” the authors wrote.
It remains unclear if cosmic rays cause all lightning flashes or just some. Either way, it is a remarkable thing to consider: Cosmic rays are created in distant interstellar and even intergalactic events. The rays take millions, maybe billions of years to reach Earth. And when they do, they produce lightning in thunderstorms!
Hat tip reader Steve Golson.
