The Lucy spacecraft, en route to its primary mission targets, zipped past the main-belt asteroid Dinkinesh and revealed its tiny satellite, Selam. New research examines the surfaces and histories of these small rocky worlds.

A Stop Along the Way

In 2021, the Lucy spacecraft embarked on a 12-year mission to study several Jupiter trojan asteroids, which share Jupiter’s orbit. The spacecraft won’t have its first encounter with a Jupiter trojan until 2027, but it hasn’t been idle during its long journey. In November 2023, Lucy performed a dress rehearsal of its trojan-encounter maneuvers during a flyby of a 738-meter-wide main-belt asteroid called (152830) Dinkinesh.

During this flyby, Lucy flew within 430 km (267 mi) of the asteroid and made a surprise discovery: Dinkinesh has a tiny companion, which has been named Selam. (The name Dinkinesh comes from the Amharic name for the Lucy fossil discovered in 1974; Selam is similarly named after a hominid fossil that is sometimes called “Lucy’s baby.”) Remarkably, Selam is the first known asteroid satellite that is a contact binary, made up of two separate bodies that have gently merged into one.

Craters and Boulders

In a recent research article, Edward Bierhaus (Lockheed Martin Space) and collaborators analyzed Lucy flyby images to study the surfaces of Dinkinesh and Selam. The team analyzed global features like troughs and ridges and measured visible craters and boulders.

While the small numbers of craters detected — 29 for Dinkinesh and 3 for Selam — makes further analysis difficult, the team determined that Dinkinesh’s crater size–frequency distribution is shallower than expected, though similar to that of small near-Earth asteroids (e.g., Ryugu). The seemingly shallow distribution may be an effect of the phase angle and resolution of the observations, or it could be a sign of impact armoring or other surface processes.

The size–frequency distribution of Dinkinesh’s boulders, on the other hand, is somewhat steeper. This discovery may mean that S-type (stony) asteroids like Dinkinesh have different boulder size distributions than C-type (carbonaceous) asteroids.

Possible Histories

An analysis of the collisional timescales in the main asteroid belt suggests that Dinkinesh is a fragment of a larger asteroid that was split apart at least once, though it’s not yet possible to say which parent body it might have come from. After splitting off from its parent asteroid, Dinkinesh appears to have been subjected to the Yarkovsky–O’Keefe–Radzievskii–Paddack (YORP) effect. This effect arises when sunlight falls on a small asymmetric asteroid, creating a torque that can alter its spin rate. In extreme cases, the YORP effect can crank up an asteroid’s spin rate so much that it sheds some of its surface material or flies apart altogether.

Dinkinesh seems to show clear signs of YORP-driven structural failure. Sumak Fossa (a large trough) and Fab Dorsum (a ridge running along the asteroid’s equator) may have formed through this process. If Sumak Fossa was excavated by a YORP-induced mass-shedding event, both Fab Dorsum and Selam could have formed out of the cast-off material.

With Lucy en route to its primary objective, there’s still much for us to learn from this mission about the small bodies of our solar system. In the meantime, be sure to check out the full article linked below, as there are far more details about Dinkinesh and Selam than could be included in this short summary!

Citation

“The Geology of a Small Main-Belt S-Class Binary Asteroid System: Dinkinesh and Its Contact Binary Satellite Selam as Observed by the Lucy Mission,” E. B. Bierhaus et al 2025 Planet. Sci. J. 6 299. doi:10.3847/PSJ/ae1968

The post Details on Dinkinesh and Its Surprise Satellite from the Lucy Mission appeared first on AAS Nova.

In September 2022, the Double Asteroid Redirection Test (DART) mission served as the first attempt at redirecting a near-Earth asteroid — an experiment testing humanity’s ability to fend off any threatening Earth-bound asteroids. A recent study presents the first 3D reconstruction of the impact ejecta, suggesting that the blown-out material is more complex than previous models considered.

DART-ing into Dimorphos 

The DART spacecraft intentionally smashed into Dimorphos, the small and unassuming moon of the larger asteroid Didymos. This space-based crash test aimed to determine if kinetic impactors like DART could successfully change an asteroid’s course through the solar system. Dimorphos’s orbit was indeed shortened by roughly 30 minutes, confirming that ramming an asteroid with a spacecraft could be a viable method of planetary defense. However, determining exactly how much an asteroid’s path will be altered is not necessarily straightforward. When a spacecraft collides with an asteroid, the impactor imparts momentum to the target, and any material excavated from the impact site can also alter the asteroid’s course.

DART’s impact launched a significant spray of rubble, or what researchers call an ejecta curtain. The ejecta curtain is typically modeled as a cone, using a simple geometry to determine its contribution to momentum transfer. However, when looking closely at imaging taken soon after the collision, the real physical structure of the ejecta appears to be more complex. Untangling the true 3D distribution of the ejecta is necessary to understand how momentum was actually distributed among escaping ejecta, better estimate the total mass ejected from Dimorphos, and improve modeling of the Didymos system’s orbit after impact.

Determining Debris Distribution

Seeking to better characterize the ejecta curtain, a team led by J. D. P. Deshapriya from Italy’s National Institute for Astrophysics used data from the Light Italian CubeSat for Imaging of Asteroids (LICIACube) that flew behind the DART spacecraft to capture images of the system shortly after the impact. After careful image handling to bring out diffuse and faint material, the researchers identified 14 distinct ejecta features across the flyby imaging. LICIACube viewed the aftermath both side on and face on, providing valuable 3D information about the distribution and motion of the ejecta. 

Using 3D modeling software, the researchers traced each of the 14 distinct features across the images and reconstructed a 3D representation of the ejecta morphology. While earlier models assumed symmetric cone-like geometries, this 3D modeling revealed clear asymmetric and non-uniform structures within the ejecta curtain. These variations point to underlying heterogeneities in the impact site on Dimorphos — surface and subsurface composition naturally link to the resulting ejecta distribution according to previous laboratory experiments. The spatial and directional features uncovered in this study highlight the limitations of models that attempt to characterize ejecta curtains with symmetric and uniform distributions. Refining these model parameters will better match observations and better predict momentum transfer in future missions. 

Planetary Defense

What does this mean for planetary defense? While simplified symmetric cone models provide helpful approximations for kinetic impactor missions, they do not fully capture the true complexity of the impact. This study shows that local variations in an asteroid’s surface and interior properties can directly influence the resulting ejecta distribution and motion. The true momentum imparted to the target asteroid depends heavily on the specific ejecta material, and these details inform how effective planetary defense missions can be in redirecting asteroids. Incorporating realistic, observation-driven ejecta distributions into modeling frameworks is essential to achieve reliable predictions for future planetary defense missions.

Citation

“3D Reconstruction of DART Ejecta at Dimorphos Reveals an Anisotropic, Filamentary Structure,” J. D. P Deshapriya et al 2026 Planet. Sci. J. 7 4. doi:10.3847/PSJ/ae2c64

The post Pulling Back the Curtain on DART Ejecta appeared first on AAS Nova.

Earthlike yet alien, Titan is the only solar system body other than Earth known to host persistent liquid on its surface. The glint of sunlight on this surface liquid provides a means to study the complex interplay between Titan’s seas, shorelines, and atmosphere.

When the Sun Hits the Sea as Seen by Cassini, That’s a Mare

In 2009, the Saturn-orbiting Cassini spacecraft spotted the glare of sunlight reflecting off a sea of liquid on the surface of Titan, Saturn’s largest moon. This observation of specular (i.e., “mirror-like”) reflection, or sunglint, confirmed the presence of liquid on Titan’s surface — what researchers now know to be oily lakes and seas of liquid hydrocarbons like methane and ethane.

A recent research article from Michael Heslar and Jason Barnes (University of Idaho) yields new insight into the behavior of Titan’s seas and coastal regions in Punga Mare. Punga Mare, located nearly at the north pole, is the smallest of Titan’s named seas and holds the distinction of being the first place where extraterrestrial waves were definitively identified.

Summering at Punga Mare

In the Cassini observation selected for this study, it’s summertime in the northern hemisphere, with balmy temperatures hovering just above 90K (−298℉/−183℃). Cassini viewed Punga Mare from an altitude of roughly 6,000 kilometers and at an oblique angle of 126 degrees. From this angle, Titan’s landmasses appear dark and the sea appears bright.

Several anomalously bright features, collectively called specular features, appear in and near Punga Mare. These features are examples of sunglint and sun glitter. Sunglint occurs when sunlight reflects off a smooth surface as light reflects off a mirror, with the angle of the incoming sunlight equal to the observer’s viewing angle. Sun glitter is a related phenomenon that occurs outside the sunglint zone, where localized changes in the angle of the surface — from waves, for example — reflect sunlight toward the observer.

Coasts, Islands, and Inlets

Heslar and Barnes identified specular features along the coastline, bordering a chain of islands, out at sea, and in coastal inlets.

The bright areas along the coast appear to overlap both the sea surface and the land surface. While it’s not yet clear exactly what causes this brilliant coastal outline, Heslar and Barnes speculated that it may be evidence for waves along the coastline; rough seas may also be the cause of the sun glitter illuminating the Hawaiki island chain and out at sea.

The specular features associated with inlets may mark where rivers flow into or out of Punga Mare. Rather than wave activity, these bright areas might mark where nitrogen has bubbled up to the surface.

Altogether, this study demonstrated the variety and depth of information that can be gleaned from a single sunglint observation — and the authors closed by noting how effective an orbiter would be for studying ocean behavior on Titan. NASA’s upcoming Dragonfly mission may also be able to capture sunglint as the spacecraft leapfrogs across Titan’s surface.

Citation

“Sea Surface and Hydrological Activity Observed in Titan’s Punga Mare,” Michael F. Heslar and Jason W. Barnes 2025 Planet. Sci. J. 6 74. doi:10.3847/PSJ/adbc9e

The post Sun Glitter and Sunglint on Titan’s Hydrocarbon Seas appeared first on AAS Nova.

Since NASA’s Artemis II crew members safely splashed down in the Pacific Ocean on April 10 after their record-setting mission around the Moon, science teams have been busy collecting more data and combing through observations collected on the test flight. Results from these science investigations will help support safe human exploration of deep space and provide a blueprint for how future missions will conduct science on the lunar surface as NASA builds a Moon Base and develops an enduring human presence there.

Postflight crew health, performance data

In the hours, days, and weeks after landing, the Artemis II crew members, NASA astronauts Reid Wiseman, Victor Glover, Christina Koch, and CSA (Canadian Space Agency) astronaut Jeremy Hansen, contributed critical data to help the agency understand how the human body reacts to spaceflight. Collecting this data as soon as possible after landing was important to understand how the body adapts from microgravity to Earth’s gravity. The data will inform NASA’s understanding of how quickly crews can complete mission-critical tasks after landing on a planetary surface like the Moon or Mars, where there won’t be landing support personnel to assist.  

Within a day of splashdown, researchers collected a suite of data for the Artemis II Spaceflight Standard Measures study, which is part of a larger effort across the astronaut corps to gather a baseline set of health measurements on blood pressure, heart rate, eye health, and motor control. Crew members also completed a mini obstacle course, which included lying down, standing up, unfurling a rope ladder, ladder climbing, and more, to assess how their bodies were adapting to Earth’s gravity.

Once the crew returned to NASA’s Johnson Space Center in Houston, researchers guided them through further medical check-ups and tests of motor control. Over the next several days, the crew completed obstacle courses wearing spacesuits offloaded to lunar gravity, which is roughly one-sixth the force of Earth’s gravity. Researchers are now analyzing this data to gain insight into how crews may perform as they adapt to the gravity of a planetary surface.

As part of the Immune Biomarkers study, researchers are comparing blood and saliva samples collected after the Artemis II splashdown with samples collected preflight and during the mission. Among other topics, the study investigates whether and how dormant viruses reawaken in astronauts’ bodies while in space.

Some crew members completed postflight cognition tests and a simulated manual spacecraft docking task to assess motor control for the ARCHeR (Artemis Research for Crew Health & Readiness) study. This, combined with data collected through a wrist-worn device while crew members were in space, is used to understand the effect of space hazards on well-being and performance.

Initial data collections for Artemis II health studies concluded 45 days after splashdown. However, medical teams will continually monitor astronaut health throughout the Artemis II crew members’ lifetimes.

Once this data is processed and anonymized, information will be available for scientists to study the effects of spaceflight via a request to NASA’s Life Sciences Data Archive. The results from this work could lead to new technologies and studies that help predict the adaptability of crews on future missions to the Moon and Mars.

Analyzing astronaut-derived organ chips flown around Moon

Organ chips from NASA’s AVATAR (A Virtual Astronaut Tissue Analog Response) investigation are being analyzed at chip developer Emulate’s laboratory in Boston. The organ chips included bone marrow cells from each Artemis II astronaut. They flew around the Moon with the astronauts, and now researchers are studying these organ chips to determine how deep space radiation and microgravity affect human health at the molecular level.

Scientists are comparing the chips flown aboard the spacecraft to ground controls and crew blood samples using advanced techniques, including single-cell RNA sequencing. The analysis will characterize how organ chips model individual responses to spaceflight, which is data that could allow NASA to send future astronauts’ AVATAR chips ahead on missions to develop personalized medical kits. The researchers plan to share early findings at scientific conferences while full analysis continues.

Lunar imagery, audio for data release

On April 6, the Artemis II crew members studied features on and around the Moon for nearly seven hours during Orion’s closest approach to the lunar surface. Their work was guided by a minute-by-minute observation plan developed by the Artemis II lunar science team.

Scientists are reviewing the data collected from the mission, which includes images, video, and audio files, to release a report of their initial data interpretations later this year. The report will cover observations of impact flashes, variations in color on the lunar surface, and the shape and texture of faults and ridges. The team also will publish a report on how Artemis II lunar science observations were planned, organized, and executed for the benefit of future Artemis missions.

NASA will publish more than 100 science-related audio recordings with transcripts, as well as approximately 11,500 Earth and Moon image and video files from the mission science campaign, with accompanying data. While many of these images already are public, these records will be available through NASA’s Planetary Data System, a public archive of data from all of NASA’s planetary missions. To get the data ready, the team is converting files into standard formats that anyone can easily open and add information to make the data searchable in NASA’s archive for generations to come.

For more information on NASA’s Artemis II science efforts, visit:

https://www.nasa.gov/humans-in-space/artemis-ii-science/

Karen Fox / Molly Wasser

Headquarters, Washington

240-285-5155 / 240-419-1732

karen.c.fox@nasa.gov / molly.l.wasser@nasa.gov

The post NASA’s Artemis II Moon Mission Research Continues on Earth appeared first on NASA Science.

Since NASA’s Artemis II crew members safely splashed down in the Pacific Ocean on April 10 after their record-setting mission around the Moon, science teams have been busy collecting more data and combing through observations collected on the test flight. Results from these science investigations will help support safe human exploration of deep space and provide a blueprint for how future missions will conduct science on the lunar surface as NASA builds a Moon Base and develops an enduring human presence there.

Postflight crew health, performance data

In the hours, days, and weeks after landing, the Artemis II crew members, NASA astronauts Reid Wiseman, Victor Glover, Christina Koch, and CSA (Canadian Space Agency) astronaut Jeremy Hansen, contributed critical data to help the agency understand how the human body reacts to spaceflight. Collecting this data as soon as possible after landing was important to understand how the body adapts from microgravity to Earth’s gravity. The data will inform NASA’s understanding of how quickly crews can complete mission-critical tasks after landing on a planetary surface like the Moon or Mars, where there won’t be landing support personnel to assist.  

Within a day of splashdown, researchers collected a suite of data for the Artemis II Spaceflight Standard Measures study, which is part of a larger effort across the astronaut corps to gather a baseline set of health measurements on blood pressure, heart rate, eye health, and motor control. Crew members also completed a mini obstacle course, which included lying down, standing up, unfurling a rope ladder, ladder climbing, and more, to assess how their bodies were adapting to Earth’s gravity.

Once the crew returned to NASA’s Johnson Space Center in Houston, researchers guided them through further medical check-ups and tests of motor control. Over the next several days, the crew completed obstacle courses wearing spacesuits offloaded to lunar gravity, which is roughly one-sixth the force of Earth’s gravity. Researchers are now analyzing this data to gain insight into how crews may perform as they adapt to the gravity of a planetary surface.

As part of the Immune Biomarkers study, researchers are comparing blood and saliva samples collected after the Artemis II splashdown with samples collected preflight and during the mission. Among other topics, the study investigates whether and how dormant viruses reawaken in astronauts’ bodies while in space.

Some crew members completed postflight cognition tests and a simulated manual spacecraft docking task to assess motor control for the ARCHeR (Artemis Research for Crew Health & Readiness) study. This, combined with data collected through a wrist-worn device while crew members were in space, is used to understand the effect of space hazards on well-being and performance.

Initial data collections for Artemis II health studies concluded 45 days after splashdown. However, medical teams will continually monitor astronaut health throughout the Artemis II crew members’ lifetimes.

Once this data is processed and anonymized, information will be available for scientists to study the effects of spaceflight via a request to NASA’s Life Sciences Data Archive. The results from this work could lead to new technologies and studies that help predict the adaptability of crews on future missions to the Moon and Mars.

Analyzing astronaut-derived organ chips flown around Moon

Organ chips from NASA’s AVATAR (A Virtual Astronaut Tissue Analog Response) investigation are being analyzed at chip developer Emulate’s laboratory in Boston. The organ chips included bone marrow cells from each Artemis II astronaut. They flew around the Moon with the astronauts, and now researchers are studying these organ chips to determine how deep space radiation and microgravity affect human health at the molecular level.

Scientists are comparing the chips flown aboard the spacecraft to ground controls and crew blood samples using advanced techniques, including single-cell RNA sequencing. The analysis will characterize how organ chips model individual responses to spaceflight, which is data that could allow NASA to send future astronauts’ AVATAR chips ahead on missions to develop personalized medical kits. The researchers plan to share early findings at scientific conferences while full analysis continues.

Lunar imagery, audio for data release

On April 6, the Artemis II crew members studied features on and around the Moon for nearly seven hours during Orion’s closest approach to the lunar surface. Their work was guided by a minute-by-minute observation plan developed by the Artemis II lunar science team.

Scientists are reviewing the data collected from the mission, which includes images, video, and audio files, to release a report of their initial data interpretations later this year. The report will cover observations of impact flashes, variations in color on the lunar surface, and the shape and texture of faults and ridges. The team also will publish a report on how Artemis II lunar science observations were planned, organized, and executed for the benefit of future Artemis missions.

NASA will publish more than 100 science-related audio recordings with transcripts, as well as approximately 11,500 Earth and Moon image and video files from the mission science campaign, with accompanying data. While many of these images already are public, these records will be available through NASA’s Planetary Data System, a public archive of data from all of NASA’s planetary missions. To get the data ready, the team is converting files into standard formats that anyone can easily open and add information to make the data searchable in NASA’s archive for generations to come.

For more information on NASA’s Artemis II science efforts, visit:

https://www.nasa.gov/humans-in-space/artemis-ii-science/

Karen Fox / Molly Wasser

Headquarters, Washington

240-285-5155 / 240-419-1732

karen.c.fox@nasa.gov / molly.l.wasser@nasa.gov

NASA has completed the investigation into the damage sustained last year at its 70-meter radio-frequency antenna, known as the Deep Space Station 14 (DSS-14), at the Goldstone Deep Space Communications Complex near Barstow, California. The agency has classified the event as a Type A mishap based on the total cost of damages. The antenna will remain offline to complete repairs and previously scheduled upgrades.

“NASA takes safety and any departure from established procedures seriously, and the investigation at Goldstone made clear that we must strengthen our processes. We are acting on the investigation’s findings,” said Joel Montalbano, acting associate administrator for NASA’s Space Operations Mission Directorate at the agency’s headquarters in Washington. “We will update and improve procedures, rebuild core in-house capabilities, and reinforce operational discipline across the Deep Space Network. NASA remains focused on learning from this and modernizing systems, so DSS-14 and the broader network are ready to support our ambitious future missions.”

On Sept. 16, 2025, the DSS‑14 antenna over‑rotated while actively tracking the Juno mission, placing excessive stress on cabling and associated structural supports. Water lines tied to the antenna’s fire‑suppression system also were damaged, causing significant flooding in the facility. There were no injuries.

NASA convened a Mishap Investigation Board, bringing together experts from across the agency to examine the technical, organizational, and cultural factors behind the incident. The board conducted on‑site inspections, interviews, and detailed reviews of technical documentation and operational logs from all three Deep Space Network sites. The board completed its final report in April and submitted it for agency concurrence.

The investigation issued findings and recommendations that emphasize training, technical rigor, operational procedures, system design, clear roles and responsibilities, and safety assurance. At the same time, teams already are applying lessons learned across all network sites to improve operational consistency. These steps will help bolster the network and reduce the risk of future mishaps.

In its final report, the board found the mishap primarily stemmed from software weaknesses, human error, and an undetected failure in the antenna’s hydraulic limit system. Investigators determined an electrical issue at the antenna the previous day caused the control system to misreport the antenna’s rotation state, an issue that went unnoticed and triggered multiple limit-stops during the Juno track on Sept. 16. While working to identify the limit-stop problem, operators performed several troubleshooting steps that inadvertently bypassed software and hardware safeguards, which ultimately led to the over-rotation incident. After flooding in the antenna base was observed, operators attempted to stow the antenna as a safety precaution, however, because the system had already passed the rotation limits, this action drove the antenna further into over‑rotation, causing additional damage.

Additionally, the investigation found the antenna’s hydraulic limit system, its final mechanical safeguard, was inoperable on Sept. 16 after being damaged in an undocumented prior incident. The system also had not been adequately tested for an undetermined period of time.

Investigators also concluded workplace culture pressured operators to work as expeditiously as possible, often stretching beyond their usual roles, expertise, and training, to keep the antenna operating. The board states the cultural conditions observed at Goldstone were not present at the network’s other sites, where roles and responsibilities are followed more consistently. Other contributing factors outlined in the report include inadequate procedures, reliance on undocumented practices and tacit knowledge, and gaps in the antenna’s control logic. NASA will accept this as the final report.

The agency estimates repairs will cost between $4.1 and $4.6 million, with a final figure to be determined after the antenna’s systems are fully assessed. The antenna will remain offline as it enters its previously scheduled extended maintenance and upgrade period, originally set to begin in August and expected to be completed by October 2028. These upgrades are part of broader network improvements essential to supporting future exploration and science missions, as well as enhancing the nation’s planetary defense capabilities.

“We are committed to learning everything we can from this incident, and we’ve already begun putting those lessons into practice,” said Kevin Coggins, deputy associate administrator for NASA’s SCaN (Space Communications and Navigation) Program at the agency’s headquarters. “Our teams are working to strengthen and standardize processes and training across all three network sites to ensure it remains resilient, consistent, and ready to support the next generation of missions. Every challenge is an opportunity to improve, and this is no exception.”

The Deep Space Network continues to provide full coverage for more than 40 missions despite the DSS‑14 incident. The network’s 13 other antennas, located at complexes in California, Australia, and Spain, are supporting all tracking needs without interruption. A dedicated scheduling team allocates antenna time across the network to meet each mission’s science and data‑return objectives. The team also maintains continuous coverage when an antenna goes offline for maintenance or an unexpected outage.

To view the report, which includes redactions to protect proprietary and privacy-sensitive material, visit:

https://www.nasa.gov/wp-content/uploads/2026/06/dss14-mishap-investigation-board-report-signed-final-redacted-hm-tagged-508.pdf?emrc=74c749

ISS astronauts briefly sheltered aboard an attached SpaceX Dragon capsule today (June 5) while cosmonauts tried to fix a persistent leak on the Russian side of the orbiting lab.

The president announced a total of $700 million in federal money to reinvigorate the domestic coal industry, which has been in decline for decades.

© Evelyn Hockstein/Reuters

The president announced a total of $700 million in federal money to reinvigorate the domestic coal industry, which has been in decline for decades.

NASA just declared its MAVEN Mars orbiter dead after a dozen productive years circling the Red Planet. Here's the fate that awaits the probe.

Recent measurements indicate a rise in atmospheric CO2, attributed to human activities by various "experts", despite claims that human contribution is minimal. Research by Dai Ato challenges the established pre-industrial CO2 level of 280 ppm, suggesting it’s underestimated and highlighting flaws in related climate studies, thus questioning current climate change assumptions.

New guidance from the Energy Department would prevent people from receiving rebates after making such swaps.

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Nour Haydar speaks with Christopher Knaus about the BHP files – the cache of internal documents leaked to the Guardian and the ABC’s Four Corners – which show that the world’s biggest miner has war-gamed ways to massively delay decarbonisation

Additional audio in this episode was sourced by Financial Times Live

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© Composite: Victoria Hart/Guardian

© Composite: Victoria Hart/Guardian

© Composite: Victoria Hart/Guardian

Exclusive: Mining giant says technology is not yet advanced enough to run a fully electrified fleet but experts say it is hooked on federal fuel tax credits

• Revealed: the internal BHP memo that slammed the brakes on world’s biggest miner’s climate push

• Read more from the BHP files investigation here

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BHP has continued to spend hundreds of millions of dollars buying diesel trucks in the Pilbara despite internal documents suggesting it would increase emissions and be “misaligned” with its decarbonisation goals.

The mining giant is Australia’s biggest consumer of diesel and trucks are its biggest single source of diesel emissions. Replacing the fleet with battery-electric trucks is considered a critical step in the multinational’s efforts to decarbonise.

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© Composite: Guardian

© Composite: Guardian

© Composite: Guardian

The regulation would have required all publicly traded companies to disclose whether they faced significant risks from climate change and its effects.

© Loren Elliott for The New York Times

NASA is working hard to predict where in Earth orbit its Swift space telescope will be this fall, so that a private spacecraft can meet up with the observatory and boost its altitude.

Russian cosmonauts Sergey Kud-Sverchkov and Sergei Mikaev worked to install and retrieve science experiments while on a spacewalk outside the International Space Station on Wednesday, May 27, 2026.

On June 9, NASA will reveal the astronauts who will fly on the Artemis 3 docking mission in Earth orbit next year.

Cosmonauts Sergey Kud-Sverchkov and Sergei Mikaev will perform a spacewalk outside the International Space Station today (May 27), and you can watch the action live.

While global warming is still a threat, the decision to back away from a worst-case outlook raises questions about whether some risks have been overstated.

© Apu Gomes/Agence France-Presse — Getty Images