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Gen. Chance Saltzman used his final public address as chief of the U.S. Space Force to tell allied commanders in London that a war in orbit would sweep in every nation’s satellites, because orbital mechanics does not respect the line between combatant and bystander

16 July 2026 at 14:40
The outgoing Space Force chief spent his farewell address saying the quiet part loud — deterrence in orbit doesn't come from treaties or press releases, it comes from weapons allies pretend not to want

A war fought in orbit will not stay between the two countries that start it. That was the blunt message Gen. Chance Saltzman carried into his final public address as Chief of Space Operations, delivered to an international audience of military leaders at the Global Air & Space Chiefs’ Conference in London. Orbital conflict, the outgoing Space Force chief argued, is no longer hypothetical, and deterrence flows from combat-credible forces rather than declarations.

The speech capped a military career spanning more than three decades and a tenure leading a service that barely existed when he took command.

The core warning

Saltzman’s central claim was geographic as much as strategic. Satellites do not respect borders. A war fought in orbit — even one initiated between two adversaries — sweeps in every nation with assets overhead.

He told the London audience that orbital mechanics will place every nation’s space capabilities in a space war zone whether those nations want to be there or not. Because the consequences will be shared, he argued, responsibility for a safe, secure, and stable space domain should be shared as well.

The message was aimed squarely at allied air and space chiefs. Saltzman framed space as a team sport — not by preference, but by physics.

Deterrence as capability, not signaling

Saltzman has spent his tenure pushing back against a version of deterrence built primarily on statements, red lines, and calculations about adversary intent. His alternative strategy asks the service to avoid operational surprise, deny adversaries the benefit of striking first, and develop counterspace capabilities that do not generate long-lived orbital debris.

The logic is that visible, credible force does the deterrent work on its own.

Saltzman argued that combat-credible capabilities should create a deterrent effect, and that if they don’t, the force will be prepared to respond to aggression.

That framing matters because it shifts the burden of prediction. Rather than trying to game out what Beijing or Moscow might do, the Space Force builds forces designed to defeat what those adversaries have already fielded — jammers, dazzlers, co-orbital interceptors, and cyber tools capable of disabling satellites.

Those warnings are grounded in a specific assessment: China and Russia are developing systems capable of jamming, disabling, or destroying satellites. That has pushed the Space Force’s focus toward what is known as space control — the ability to defend friendly assets and, if necessary, disrupt adversary space operations.

The terrestrial precedent is already visible. Widespread GPS jamming across the Middle East during recent conflicts has disrupted commercial aviation, shipping, and civilian navigation across a wide region. Space-based services are already contested infrastructure. The question is whether the platforms themselves become targets.

Saltzman’s answer is that if adversaries believe an attack on U.S. satellites can be answered — and answered without turning low Earth orbit into a debris field — the attack becomes less likely.

A service transformed in four years

Space Force general podium

When Saltzman took command, the Space Force was less than three years old. It had a thin institutional identity and no coherent long-term force design.

By the time of his farewell, the service had grown and gained visibility through its role supporting recent operations.

Under Saltzman, the Space Force introduced the Objective Force — a 15-year force-design effort meant to define the spacecraft, personnel, infrastructure, and partnerships the service will need through 2040. It also began implementing a new personnel model that blends full- and part-time service, moving away from the traditional active-reserve split. In April, nearly 250 Air Force reservists were selected to transfer into part-time Guardian roles, a step toward a single, unified component.

The budget shadow

Saltzman’s farewell came as House lawmakers signaled they would approve only a fraction of the funds the Trump administration had requested for major space programs through budget reconciliation.

The White House had requested substantial funding through the normal defense budget plus additional funding through reconciliation — a partisan-controlled maneuver rarely used for defense spending until recently. The reconciliation package was meant to fund programs including space capabilities and missile defense efforts. House leaders indicated they would back a significantly smaller reconciliation bill.

Saltzman declined to say publicly whether that shortfall would harm the service. He said he stood behind the request and called it a dramatic increase in resourcing for capabilities he considers vital. The rest, he acknowledged, is a negotiation between the executive and the legislature.

Alliances and the political weather

The London speech came after recent tensions between the United States and European allies. Saltzman’s message pushed the other direction.

He emphasized that nations are stronger as a team than individually, pointing to decades of evidence supporting that conclusion.

He also offered a rare piece of advice to uniformed leaders operating in politically turbulent times, describing military institutions in democracies as providing stability — the weight that slows movement but keeps the vessel stable in a storm.

The framing is worth pausing on. Space is one of the few remaining domains where allied cooperation is not just useful but structurally required. Satellites cross national airspace hundreds of times a day. Space situational awareness depends on ground stations scattered across friendly territory. Debris from a single kinetic anti-satellite test can threaten spacecraft belonging to dozens of nations. The physics forces the politics.

What Saltzman leaves behind

Lt. Gen. Douglas Schiess is expected to become the third Chief of Space Operations if confirmed by the Senate. He inherits a service with a clearer doctrine than the one Saltzman received, but also with sharper political headwinds, a contested budget, and adversaries whose counterspace programs have matured considerably in recent years.

One line from Saltzman’s farewell hints at how he thinks about the job he’s handing off: not all challenges must be solved, and some should simply be managed.

Acquisition speed, interoperability across allied systems, information sharing between classified and unclassified networks — these are persistent conditions of running a modern military service, not problems with endpoints. Treating them as solvable invites frustration. Treating them as manageable invites patience.

That’s a quieter argument than the headline warning about war in orbit, but it may be the more consequential one for the institution Saltzman built. The Space Force he leaves is younger than most of its guardians’ careers. It will spend the next decade discovering which of its problems are the kind that get fixed and which are the kind that get lived with.

For readers thinking about how space reshapes institutional identity and civilian imagination, our earlier piece on Artemis 2, Apollo 8, and overview thinking traces a parallel question from the exploration side of the ledger.

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Office of Space Commerce makes its case for mission authorization

16 July 2026 at 13:06
Jordan

The Office of Space Commerce defended its proposal for a mission authorization scheme for novel space activities, arguing it would provide certainty for companies while limiting regulatory burdens.

The post Office of Space Commerce makes its case for mission authorization appeared first on SpaceNews.

Starship’s 13th flight is being sold as a Starlink deployment test, but the engine relight problem it needs to solve is the one quietly rewriting NASA’s Artemis timeline

16 July 2026 at 12:00
Starship's 13th flight is being sold as a Starlink deployment test, but the engine relight problem it needs to solve is the one quietly rewriting NASA's Artemis timeline

SpaceX is targeting Thursday for the 13th full-scale test flight of Starship, a mission that will carry Starlink satellites into a suborbital trajectory and attempt to resolve the two most consequential failures from May’s Flight 12: a Raptor engine relight in space and control instability on the Super Heavy booster during descent.

The launch window opens at 5:45 pm CDT from Starbase, Texas, with the Federal Aviation Administration indicating a possible liftoff as early as Wednesday, July 15. Booster 20 completed a static fire of all 33 Raptor 3 engines on July 10, clearing the last major checkpoint before rollout.

Starship booster static fire

Flight 13 is the second outing for Starship V3, the redesigned vehicle SpaceX debuted in May with a taller propellant tank, upgraded avionics, and hardware for future orbital propellant transfer. It is also the first time the company will fly working Starlink satellites inside Starship’s payload bay rather than the mass simulators used on earlier tests.

What Flight 12 broke, and what Flight 13 has to fix

Flight 12 in May was billed as a mixed result. The upper stage reached its planned suborbital trajectory and executed a soft splashdown in the Indian Ocean. The Super Heavy booster did not. Booster 19 failed to stabilize itself for a controlled ocean landing after multiple engines encountered relight issues during the boostback burn.

The upper stage had its own problem. An engine anomaly forced SpaceX to skip the in-space Raptor relight demonstration, a capability that must work reliably before Starship can perform deorbit burns, orbital maneuvers, or the lunar descent required by NASA’s Artemis contract.

SpaceX attributed the booster’s issues to engine startup timing differences during stage separation. SpaceX reportedly stated that the vehicle demonstrated engine out capability and reached its planned suborbital trajectory, according to what was described as an official post-flight statement. SpaceX indicated that hardware and operational modifications were made to address the causes of the issues.

Flight 13 will attempt the same mission profile with those fixes in place. Ship 40 and Booster 20 will fly a suborbital arc lasting slightly over an hour, with both stages targeting ocean splashdowns rather than tower catches.

The heat shield is the real problem

Behind the engine relight and booster control objectives sits a harder engineering question that Elon Musk has repeatedly identified as the single biggest obstacle to making Starship economically viable.

Musk has stated that the single biggest remaining problem for Starship is having the heat shield be reusable, noting that no one has ever made a reusable orbital heat shield.

Starship’s belly is covered in thousands of hexagonal ceramic tiles that must survive repeated reentries without individual inspection or replacement. Falcon 9 has proven that first-stage boosters can fly dozens of times, but that vehicle never faces orbital reentry heating. Ship does, and it does so in a belly-first freefall profile more reminiscent of the Space Shuttle than a returning booster.

Musk has emphasized that if you want to be able to land the vehicle, refill propellant, and fly again, you can’t do laborious inspection of thousands of tiles.

To gather data on how the current tile configuration is holding up, several of the Starlink satellites on this flight will carry cameras aimed at Starship’s heat shield. The satellites will photograph and scan the vehicle’s tiles during ascent and cruise before deployment, giving engineers imagery that ground telemetry cannot capture.

Why Starlink V3 matters for the economics

The satellites aboard Flight 13 are the first operational V3 units to ride Starship. When Starship is fully qualified, each launch will be able to carry significantly more V3 satellites — a payload class that Falcon 9 cannot physically accommodate.

The capacity math explains why SpaceX has pushed Starship development so aggressively. A fully loaded Starship with V3 satellites would add substantially more throughput per launch than current Falcon 9 missions.

That expansion sits on top of an already dominant orbital footprint. SpaceX now operates more than 10,000 Starlink satellites, roughly two-thirds of all active spacecraft in orbit. Starship’s operational debut would accelerate that concentration rather than slow it.

NASA is watching, and running out of patience

Starship’s schedule pressure is no longer just commercial. NASA is counting on a Starship-derived Human Landing System to deliver astronauts to the lunar south pole under the Artemis program, and the agency has begun restructuring its plans around Starship’s slower-than-hoped progress.

NASA administrator Jared Isaacman announced in February that Artemis III would no longer attempt a lunar landing. Instead, a crew will fly to low-Earth orbit in 2027 to practice docking with a lunar lander, with the actual surface landing pushed to a later Artemis mission in 2028.

Isaacman reportedly criticized the previous architecture as unsustainable or inadequate for achieving mission success.

NASA has asked SpaceX for a streamlined plan to speed the lunar return, and has also asked Blue Origin to accelerate its competing lander. China is targeting a crewed lunar landing by 2030, and both nations are aiming for overlapping locations at the south pole.

The stakes for the vehicle

Starship stands over 400 feet tall, making it the largest rocket ever flown. It is designed to lift more than 100 tons to low Earth orbit fully reusably — a capability no other vehicle, current or historical, has come close to demonstrating.

The vehicle still has a long list of milestones ahead of it even if Flight 13 succeeds: an orbital insertion, ship-to-ship propellant transfer, and the first catch of an upper stage back at Starbase. None of those are on the manifest for Thursday.

What Flight 13 can do is prove that the V3 architecture is stable enough to build on. A clean flight with a successful in-space Raptor relight, a controlled booster descent, and useful heat shield imagery would put SpaceX back on the trajectory the company sketched out before Flight 12’s engine problems.

A second consecutive failure of either objective would be harder to absorb. NASA’s revised Artemis timeline already assumes Starship recovers momentum quickly. Starlink’s V3 capacity buildout depends on the vehicle reaching operational cadence. And the underlying question — whether anyone can build a heat shield that survives reentry after reentry without a small army of technicians inspecting every tile — remains unanswered.

The launch window opens Thursday afternoon. Weather and range conditions permitting, the answer to at least part of that question will be visible from Starbase by nightfall.

The post Starship’s 13th flight is being sold as a Starlink deployment test, but the engine relight problem it needs to solve is the one quietly rewriting NASA’s Artemis timeline appeared first on Space Daily.

Move over, GPS: Navigation satellites in low-Earth orbit are making a comeback

16 July 2026 at 12:00

New navigation satellites in low-Earth orbit could provide 100 times stronger signal strength compared to GPS and other global navigation satellite systems operating from higher orbital altitudes—enabling greater location accuracy within dense cities, under thick foliage, and even inside buildings. Such signals would also likely prove more resilient to interference at a time when commercial flights, maritime shipping, and even various smartphone apps face increasingly widespread disruption from GPS jamming.

That vision may start to take shape when the first six production satellites of California-based Xona Space Systems are scheduled to launch in October 2026, with early service starting in 2027. Once the full constellation of 258 Pulsar satellites has been launched in the following years, Xona claims that customers will be able to accurately pinpoint their locations anywhere on Earth to within several centimeters.

“That added power means that we can get into that indoor environment that GPS can't get to today,” Adrien Perkins, co-founder and VP of engineering at Xona Space Systems, told Ars. “Our higher power allows you to get into those jamming environments a lot further than you would with GPS by itself.”

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© Xona Space Systems

Move over, GPS: Navigation satellites in low-Earth orbit are making a comeback

16 July 2026 at 12:00

New navigation satellites in low-Earth orbit could provide 100 times stronger signal strength compared to GPS and other global navigation satellite systems operating from higher orbital altitudes—enabling greater location accuracy within dense cities, under thick foliage, and even inside buildings. Such signals would also likely prove more resilient to interference at a time when commercial flights, maritime shipping, and even various smartphone apps face increasingly widespread disruption from GPS jamming.

That vision may start to take shape when the first six production satellites of California-based Xona Space Systems are scheduled to launch in October 2026, with early service starting in 2027. Once the full constellation of 258 Pulsar satellites has been launched in the following years, Xona claims that customers will be able to accurately pinpoint their locations anywhere on Earth to within several centimeters.

“That added power means that we can get into that indoor environment that GPS can't get to today,” Adrien Perkins, co-founder and VP of engineering at Xona Space Systems, told Ars. “Our higher power allows you to get into those jamming environments a lot further than you would with GPS by itself.”

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© Xona Space Systems

Move over, GPS: Navigation satellites in low-Earth orbit are making a comeback

16 July 2026 at 12:00

New navigation satellites in low-Earth orbit could provide 100 times stronger signal strength compared to GPS and other global navigation satellite systems operating from higher orbital altitudes—enabling greater location accuracy within dense cities, under thick foliage, and even inside buildings. Such signals would also likely prove more resilient to interference at a time when commercial flights, maritime shipping, and even various smartphone apps face increasingly widespread disruption from GPS jamming.

That vision may start to take shape when the first six production satellites of California-based Xona Space Systems are scheduled to launch in October 2026, with early service starting in 2027. Once the full constellation of 258 Pulsar satellites has been launched in the following years, Xona claims that customers will be able to accurately pinpoint their locations anywhere on Earth to within several centimeters.

“That added power means that we can get into that indoor environment that GPS can't get to today,” Adrien Perkins, co-founder and VP of engineering at Xona Space Systems, told Ars. “Our higher power allows you to get into those jamming environments a lot further than you would with GPS by itself.”

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© Xona Space Systems

Astronomers Uncover A Strange Nearby Planet System Unlike Anything In Our Solar System

16 July 2026 at 11:50

Barnard’s Star is one of the most famous stars in the night sky for astronomers because it is so close to Earth. Located just under six light-years away, it is the second-closest star system after Alpha Centauri. In 2025, scientists confirmed that four small planets orbit this nearby star. Now, a new study has revealed […]

The post Astronomers Uncover A Strange Nearby Planet System Unlike Anything In Our Solar System appeared first on Knowridge Science Report.

Buzz Aldrin sells famous felt-tip pen that helped launch Apollo from the Moon

15 July 2026 at 23:10

A dried-out felt-tip marker and a snapped-off piece of molded black plastic sold for $857,600 at a Sotheby's auction on Wednesday.

What otherwise might have been worthless bits of trash commanded the highest bids due to where the two items were 57 years ago—lifting off aboard NASA's Apollo 11 spacecraft on humanity's first mission to land astronauts on the Moon. More than flown odds and ends, one was the problem that almost stranded Neil Armstrong and Buzz Aldrin on the lunar surface, and the other was the simple solution to saving the mission.

"Houston, Tranquility. Do you have a way of showing the configuration of the engine arm circuit breaker?" radioed Aldrin to Mission Control after realizing he or Armstrong had inadvertently broken off the top of the circuit breaker switch that would enable their ascent engine to ignite, beginning their trip back to Earth. "The reason I'm asking is because the end of it appears to be broken off. I think we can push it back in again. I'm not sure we could pull it out if we pushed it in, though."

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© Sotheby's

Buzz Aldrin sells famous felt-tip pen that helped launch Apollo from the Moon

15 July 2026 at 23:10

A dried-out felt-tip marker and a snapped-off piece of molded black plastic sold for $857,600 at a Sotheby's auction on Wednesday.

What otherwise might have been worthless bits of trash commanded the highest bids due to where the two items were 57 years ago—lifting off aboard NASA's Apollo 11 spacecraft on humanity's first mission to land astronauts on the Moon. More than flown odds and ends, one was the problem that almost stranded Neil Armstrong and Buzz Aldrin on the lunar surface, and the other was the simple solution to saving the mission.

"Houston, Tranquility. Do you have a way of showing the configuration of the engine arm circuit breaker?" radioed Aldrin to Mission Control after realizing he or Armstrong had inadvertently broken off the top of the circuit breaker switch that would enable their ascent engine to ignite, beginning their trip back to Earth. "The reason I'm asking is because the end of it appears to be broken off. I think we can push it back in again. I'm not sure we could pull it out if we pushed it in, though."

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© Sotheby's

SpaceX Investors Are Lamenting All the Money They’ve Lost

15 July 2026 at 16:53

Shares of Elon Musk’s SpaceX are scraping by at record low levels this week, struggling to find any renewed enthusiasm from wary investors.

The stock is hovering just below $136, a hair above its original IPO price of $135, and well below its opening price of $150 on the day it went public last month. Shares are down almost nine percent over the last five days alone, and are just shy of 40 percent down compared to their all-time high of $225.

The slumping value of Musk’s rocket company has been a brutal wake-up call for some particularly daring investors, who went all in on what many have started to refer to as a “meme stock.” One Reddit user, who leveraged their own Roth IRA by making major calls on SpaceX, wiped out several hundred thousand dollars from their retirement.

The user made several SPCX calls at $160 and $145, decisions that ultimately came back to haunt them.

“So my Roth IRA is down 25 percent, I went and made a few options trades in Robinhood that also went the other way,” the user lamented in the infamous Wall Street Bets subreddit.

The warning signs of a steep market correction were all there. SpaceX went public with an astronomical, multitrillion dollar valuation despite losing billions of dollars a quarter, effectively guaranteeing major volatility. Even members of the Wall Street Bets community, which has a long history of advocating for aggressive trading strategies, were shaking their heads.

“No one could have seen this coming,” one user wrote facetiously.

“Crazy that people knew the insanely bloated valuation but still went long,” another added.

“Musk companies aren’t rational, Tesla has an insanely bloated valuation and is still way too high,” one user argued. “The only winning move is not to play.”

Analysts have long warned that investing in SpaceX is a bet on Musk himself. To make sense of its enormous valuation requires buying into his lofty vision of establishing AI data centers in space and constructing a city on Mars.

As Reuters puts it, SpaceX’s listing has turned into a “confidence test.” Now that shares have plunged below its IPO price, the scales could already be falling from investors’ eyes.

“It raises the narrative that the stock is up on fluff, on speculation, on froth, and not on real fundamentals,” Miller Tabak chief market strategist Matthew Maley told Reuters.

Anybody who bought in early “hoping to ‘make a killing’ will be disappointed,” Carnegie Investment Counsel director of research Greg Halter added.

More on SpaceX shares: SpaceX Stock Plunges to All-Time Low After Competitor Makes Major Leap

The post SpaceX Investors Are Lamenting All the Money They’ve Lost appeared first on Futurism.

Astronomers Horrified by Enormous Mirror Satellite That Reflects Sunlight Back Down to Earth at Night

15 July 2026 at 14:46

There’s light pollution — and then there are giant orbital space mirrors that blot out the night sky.

On July 9, the US Federal Communications Commission approved the construction and launch of a mirror satellite that would bend our star’s illuminating rays to our will from low Earth orbit. The company behind the ambitious venture, Reflect Orbital, claims that its prototype could be used to reflect sunlight down onto dark patches of the Earth, allowing huge solar panel installations to continue generating electricity after nightfall and provide illumination during emergencies.

“We’re trying to build something that could replace fossil fuels and really power everything,” CEO Ben Nowack told The New York Times in March as the company was still seeking approval.

The proposal has outraged astronomers, who feel their profession is already being threatened by massive satellite constellations from companies like SpaceX that interfere with deep space observations. While the FCC reviewed Reflect Orbital’s application, it received nearly 2,000 public comments criticizing the proposal, Wired reported, including from leading astronomical organizations.

Betty Kioko, institutional affairs officer for the European Southern Observatory, called it an “existential threat” for optical astronomy, per Wired. Robert Massey, deputy executive director at the Royal Astronomical Society, told Space.com last October that it would be “catastrophic.” Many are skeptical that even thousands of Reflect Orbital’s satellites working in tandem would be able to reflect a meaningful fraction of the midday Sun, let alone provide enough engilding rays to power solar plants.

Biologists were also concerned, warning that playing god with sunlight could disrupt the circadian rhythms of humans and wildlife, confuse migratory patterns, and even affect phytoplankton, the tiny aquatic organisms that are the planet’s most important photosynthesizers.

Their pleas, however, fell on deaf ears. With the FCC approval, Reflect Orbital plans to launch a prototype named Eärendil-1 later this year. With its 60 foot mirror, the company claims that it will be capable of reflecting as much light as a full Moon over a roughly nine square mile area, according to Time Magazine, for about five minutes at a time.

Those are just the beginning of its ambitions. Reflect Orbital envisions operating an epic constellation of 50,000 mirror satellites by 2035, with 1,000 launched by the end of 2028 — to researchers, a disaster in the making.

More on space: SpaceX Stock Plunges to All-Time Low After Competitor Makes Major Leap

The post Astronomers Horrified by Enormous Mirror Satellite That Reflects Sunlight Back Down to Earth at Night appeared first on Futurism.

NASA Unveils Technologies That Could Build the Future of the Moon and Mars

By: NASA
15 July 2026 at 12:59
Mars Moon EarthNASA is teaming up with 37 companies to develop the next generation of technologies that could make long-term exploration of the Moon and Mars possible. NASA has chosen 41 proposals from 37 U.S. companies to help develop technologies needed for a sustained human presence on the Moon and eventual crewed missions to Mars. The companies [...]

Scientists Have Made a Sweet Discovery in Interstellar Space, Offering Clues to Mystery of Life’s Origins

15 July 2026 at 12:59

Scientists have discovered an abundance of molecules in the cosmos, but for the first time ever, they were able to detect one in interstellar space very familiar to us here on Earth: sugar. 

The discovery, made in the vast clouds of gas and dust between stars, could help scientists better understand how some of the chemical ingredients necessary for life formed long before Earth existed.

Researchers at the Centro de Astrobiología, part of the Spanish National Research Council (CSIC), identified the sugar molecule erythrulose within the interstellar medium.

Sugars are considered fundamental building blocks of life. On Earth, they play vital biological roles, including forming the backbone of RNA and contributing to the chemistry that ultimately supports DNA, while also serving as an important source of energy. Scientists studying the origins of life have long sought to understand how the first sugars formed, since they are essential ingredients in the molecules associated with life’s earliest development.

“The detection of erythrulose is very exciting because it opens up the possibility of discovering in space other sugars such as ribose, which is part of RNA, and other important molecules for the origin of life,” says Carlos Briones, co-author of the study, in a statement. 

Even so, one major question remains: where did the first biologically important sugars originate?

Previous studies have identified sugars such as ribose and glucose in meteorites and asteroid samples, suggesting that some organic compounds may have been delivered to the early Earth from space. Until now, however, no sugar had been directly detected in the cold molecular clouds where stars and planets form.

The newly identified molecule, erythrulose, was found in the molecular cloud G+0.693−0.027 near the center of the Milky Way. On Earth, erythrulose is a naturally occurring four-carbon ketose sugar.

The discovery was made using highly sensitive radio astronomy observations from the Yebes Observatory’s 40-meter radio telescope and the 30-meter telescope operated by the Institute for Radio Astronomy in the Millimeter Range. Researchers analyzed the unique radio signatures, or spectral fingerprints, emitted by molecules in space.

The team identified 12 spectral lines matching laboratory measurements of erythrulose, confirming the molecule’s presence.

The findings also challenge some existing ideas about how complex molecules form in space. Scientists have generally proposed that interstellar chemistry builds larger molecules by gradually adding carbon atoms. Yet erythrulose proved to be more abundant than related three-carbon sugars that researchers expected would appear first.

“This finding was unexpected, as the prevailing view in astrochemistry is that interstellar molecules grow in size through the sequential addition of carbon atoms,” said Izaskun Jimenez Serra (CAB), the lead author of the recent study. 

Instead, the researchers found that erythrulose could form inside icy dust grains from simpler two-carbon alcohols and aldehydes. These frozen environments may function as natural chemical laboratories, allowing increasingly complex organic molecules to develop over time.

The team estimates that during the Late Heavy Bombardment—roughly 4.1 to 3.8 billion years ago, when Earth experienced intense asteroid and comet impacts—between 500,000 and 50 million tonnes of erythrulose may have been delivered to the planet’s surface.

The discovery adds another piece to the puzzle of life’s origins, suggesting that some of its essential ingredients may have arrived with something surprisingly sweet.

This paper was published in the journal Nature Astronomy.

Chrissy Newton is a PR professional and the founder of VOCAB Communications. She currently appears on The Discovery Channel and Max and hosts the Rebelliously Curious podcast, which can be found on YouTube and on all audio podcast streaming platforms. Follow her on X: @ChrissyNewton, Instagram: @BeingChrissyNewton, and chrissynewton.com. To contact Chrissy with a story, please email chrissy @ thedebrief.org.

A most improbable astronaut just went to space

15 July 2026 at 12:30

Anil Menon, a NASA flight surgeon, felt crushed nine years ago as his hopes and aspirations collapsed around him.

For the fourth time, he had diligently applied to become an astronaut at the US space agency, seeking to fulfill a lifelong dream. Although he made it to the final round, NASA had once again rejected his application at the end of the grueling process.

"I was so sad, and I admitted defeat," Menon said. "I just did not see a pathway forward. So I pretty much, at that point in time, gave up on being an astronaut. I thought there was a zero percent chance."

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A most improbable astronaut just went to space

15 July 2026 at 12:30

Anil Menon, a NASA flight surgeon, felt crushed nine years ago as his hopes and aspirations collapsed around him.

For the fourth time, he had diligently applied to become an astronaut at the US space agency, seeking to fulfill a lifelong dream. Although he made it to the final round, NASA had once again rejected his application at the end of the grueling process.

"I was so sad, and I admitted defeat," Menon said. "I just did not see a pathway forward. So I pretty much, at that point in time, gave up on being an astronaut. I thought there was a zero percent chance."

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© John Kraus/NASA

NASA Just Took a Major Step Toward Building a Moon Base

By: NASA
15 July 2026 at 12:24
Commercial Lunar Landers on MoonNASA is taking another major step toward a permanent Moon base with four new commercial missions that will test technology, deliver science, and help prepare for humanity’s future beyond Earth. NASA has selected three commercial space companies to carry out four new lunar missions in late 2028 through the agency’s Moon Base Program. Astrobotic, Firefly [...]
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