Tag: exploration

Gigantic slumping Martian cliffs

11:14 am

Gigantic slumping Martian cliffs
Click for original image.

Cool image time! The picture to the right, cropped, reduced, and enhanced to post here, was taken on May 5, 2026 by the high resolution camera on Mars Reconnaissance Orbiter (MRO).

The science team labels this an “alluvial fan.” What we are looking at is the top 5,700 feet of a 9,400-foot-high cliff which is slumping downward. As it does so, its outer layers have been falling downward into the canyon below almost like liquid, producing the slope’s streaked look.

According to this definition, alluvial fans…

are mounds of coarse grained sediments formed when a confined stream disgorges into an unconfined area. They typically occur along the margins of mountain ranges where bedrock incised channels draining uplands spill out on to broad open valley floors. Alluvial fans occur in areas with significant topographic relief caused by rapid subsidence or uplift (rift basins, foreland basins, fold-and-thrust belts, etc.).

While the definition implies these fans only form from the flow of liquid water, that does not have to be the case. Many fans form from the long term downward motion of material from mountainsides into lower valleys or canyons, though water — either by rain, a freeze-thaw cycle, or streamflow — is usually a factor in causing this erosion.

At this location something has made that cliff slump, and in doing so produced the flow patterns on that slope
» Read more

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Venturi Space expands investment in new French factory for building Astrolab’s rover

8:59 am

Venturi Space, the European half of the partnership with the rover startup Astrolabe, is increasing its investment in a new French factory from 100 million to 250 million euros.

On 1 June, Venturi Space announced that it had increased its expected investment in the new facility to €250 million. The announcement indicated that it would no longer begin with the initial smaller facility and would instead move directly to the full 16,000-square-metre planned “technology centre.” This likely accounts for the additional €150 million in funding.

According to the company’s 1 June press release, the facility will be used for the “design and manufacture of critical technologies for lunar and Martian mobility, as well as [for] the assembly of the rovers developed by the company.” …Venturi Space is providing wheels, batteries, and battery management systems to US-based Venturi Astrolab for use aboard its rovers. During a 26 May event, NASA announced that Venturi Astrolab was one of two companies selected to build rovers for the agency’s Artemis programme.

The partnership is an unusual one. Venturi Space and Astrolab are separate companies, working together to build Astrolab’s rovers for NASA. Venturi however is also developing its own rover for the European Space Agency.

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NASA officially ends its MAVEN Mars orbiter mission

8:42 am

High altitude wind patterns on Mars
Mars’ global high altitude wind patterns,
found by MAVEN.

More than six months after engineers lost contact with the Mars orbiter MAVEN, NASA today officially ended the mission, determining the spacecraft is “not recoverable.”

The agency convened an anomaly review board in February to evaluate recovery efforts and assess the spacecraft’s probable current state. The review board has determined that the MAVEN spacecraft is not recoverable, and it is no longer capable of performing its science and data relay mission, which is consistent with the mission team’s findings.

Telemetry from MAVEN prior to the spacecraft’s passage behind Mars in December showed all subsystems working normally. After the spacecraft emerged, NASA’s Deep Space Network (DSN) did not observe a signal. A brief fragment of telemetry data from analysis of radio signals recorded by the DSN’s open-loop receivers indicated the spacecraft was in safe mode and rotating at an unusually high rate when it emerged from behind Mars, indicating a disruption in MAVEN’s orbit trajectory. The review board concluded that due to this rotation, the batteries on the spacecraft had drained, causing the communications system to lose power and rendering MAVEN in an unrecoverable state.

The actual cause of the rotation remains uncertain.

MAVEN’s mission was to study the atmosphere and surrounding environment of Mar. It gave scientists their first data on how Mars could have lost both its atmosphere as well as a significant amount of its initial supply of water. It also produced the first map of the red planet’s high altitude winds, finding that even at high altitude the winds shift around the Tharsis Bulge where Mars’s biggest volcanoes are located.

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Orbital tug startup Impulse Space raises $500 million in private investment capital

11:01 am

Impulse's tug and proposed lunar lander
Impulse’s Helios tug, transporting its proposed
lunar lander to the Moon. Click for original image.

The orbital tug startup Impulse Space announced today that it has successfully raised $500 million in private investment capital.

The round was co-led by 137 Ventures and BANNER VC, bringing the company’s total capital raised to over $1 billion. The funding will support hiring and manufacturing growth as the company scales its effort to build in-space mobility infrastructure: the vehicles, propulsion systems, and operational architecture that determine where and how spacecraft move after launch.

The company was founded by Tom Mueller, who was one of SpaceX’s first employees and helped develop the Merlin engine used on the Falcon 9. It has a fleet of tugs, with its Mira tug having already completed a number of missions. Its larger Helios tug is scheduled for its first mission next year.

Hat tip reader Nate P.

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The wind speeds on seven exoplanets also suggest presence of magnetic fields

10:54 am

Astronomers using two different ground-based telescopes were able to measure the wind speeds on seven different gas giant exoplanets, and found the speeds also suggested the presence of planetary magnetic fields, the first time such magnetic fields have been deduced on an exoplanet.

In the study, the researchers investigated the wind speeds on seven exoplanets orbiting different stars. These are gas giants similar to Jupiter, which are very close to their star. Elspeth Lee explains: “The rotation of the planets was synchronized with their orbits by the tidal forces of the parent star. Just as we only ever see one side of the moon, these planets always have one side facing the star. Thus, a glowing hot day side and a permanently dark night side have formed on the planets. The extreme temperature differences in turn lead to the generation of extremely strong winds.”

…The research team was able to show that wind speeds of around 7,200 km/h to over 25,000 km/h prevail on the exoplanets. For comparison: the fastest winds measured on Jupiter reach speeds of around 1,500 km/h.

The data showed that the hotter the planet, the slower the wind, the opposite of what was expected. The scientists believe that each planet’s magnetic field is acting to brake the winds, with the hotter planets likely having more powerful fields.

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Webb detects methane being released by interstellar comet 3I/Atlas

9:21 am

Comet 3I/Atlas's methane as seen by Webb
Comet 3I/Atlas’s methane as seen by Webb.
Click for full image.

Using the Webb Space Telescope, astronomers have now detected methane in the cloud of material released by the interstellar comet 3I/Atlas as it zipped past the Sun last fall.

The observations were taken using Webb’s MIRI (Mid-Infrared Instrument) on two separate dates as the comet traveled back out of our solar system after whipping around the Sun (post-perihelion). The first observation occurred Dec. 15 to 16, when the comet was about 205 million miles from the Sun. This was followed by a second observation Dec. 27, when the comet was about 236 million miles from the Sun.

For the first time on an interstellar visitor, Webb directly detected methane gas. Methane is highly volatile, meaning it sublimates from solid ice into a gas very easily. Its delayed appearance in comet 3I/ATLAS suggests it was buried below the comet’s top surface layer and protected from sublimation until heat from the comet’s close pass to the Sun reached deeper parts of the icy subsurface. The amount of methane relative to water found is surprisingly high, with few similar analogs in our own solar system.

Webb’s observations also confirmed that comet 3I/ATLAS remains unusually rich in carbon dioxide, releasing far more carbon dioxide relative to water when compared to typical solar system comets.

You can read their peer-reviewed paper here [pdf]. This new data confirms that Comet 3I/Atlas is not from our solar system, as its make-up is sufficiently different from solar system comets to show this. It also gives us a hint as to the solar system it came from. At the same time, the comet’s behavior is remarkably similar to solar system comets, suggesting our solar system evolved much like others.

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An active galaxy peered at by Webb in the infrared

10:57 am

M77 as seen by Webb
Click for original image.

Cool image time! The false-color infrared image to the right, cropped and reduced to post here, was taken by the Webb Space Telescope as part of a research of “massive, nearby, star-forming galaxies.” It shows Messier 77 (M77), a barred spiral galaxy located 45 million light-years away.

What makes the image cool are the eight diffraction spikes, which are an artifact of Webb and its camera.

Called diffraction spikes, they are created because the intense light from the unresolved AGN is bent (“diffracted”) very slightly at the edges of Webb’s hexagonal mirror panels and around one of the struts that hold up its secondary mirror. This distinctive six-plus-two-pointed pattern is the same for any image taken by Webb. For diffraction spikes to appear, the light source has to be very bright and very concentrated, so they’re most often seen on stars. But in some galaxies, as here, the nucleus is bright and compact enough to make diffraction spikes appear as well.

In the case of M77, the nucleus is especially bright.

At the heart of M77 is a compact region filled with hot gas that handily outshines the rest of the galaxy put together, even overcoming the light-gathering capacity of Webb’s cameras. This is an active galactic nucleus (AGN), and it’s powered by M77’s central supermassive black hole, which is eight million times as massive as our Sun. Gas in the galaxy’s central regions is pulled by the strong gravity into a tight and rapid orbit around the black hole, where it crashes together and heats up, releasing tremendous amounts of radiation.

The result is this very cool image that also highlights a great deal about galaxies and their evolution.

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Curiosity drill samples taken at different elevations show different Martian climates

10:11 am

Core samples used in study
Figure S1 of the study, showing the location
of the core samples. Click for source.

By comparing 20 different Curiosity drill samples taken during the rover’s fourteen years on Mars, scientists have detected hard evidence that the climate in Gale Crater was distinctly different at different elevations, for long periods.

This study shows that hematite can also be a marker of climate changes based on its crystallite sizes and structures, which change under different temperatures. The scientists found that hematite crystallites from higher elevations in Gale Crater were less than 10 nanometers in size, while crystallites from lower locations were generally larger, reaching up to 65 nanometers. These findings aligned with the observations that samples from higher elevations contained both hematite and goethite, while lower elevation samples lacked goethite.

They concluded that, under warmer conditions when the pH of water is neutral or slightly alkaline, goethite can transform into hematite. These warmer conditions also favored an increase in hematite crystallite size in the deeper layers of Gale Crater through a process known as Ostwald ripening, in which smaller crystallites dissolve and contribute to the growth of larger ones. “This can tell you that the top layers were colder and didn’t have enough water, or the water presence was relatively short-lived, so the crystallites didn’t have sufficient time and conditions to grow in size,” said Peretyazhko. “But the lower layers had longstanding warm water that allowed those crystallites to grow.”

The white dots on the map to the right shows the location of the drill samples used, taken along Curiosity’s travels as it climbed Mount Sharp. Overall Curiosity has climbed about 2,500 feet, so the differences found the samples mark the past climate differences between the crater floor and the mountain’s foothills. According to this data, the crater floor had long-standing water in some form, exceeding millions of years. At higher altitudes there was less and less, and it was there for increasingly shorter periods.

As the press release notes, “A unique highlight of this study is that the data comes from Martian samples, rather than from theoretical modeling.” Similar conclusions from earlier Curiosity data required Earth proxies and computer modeling. This result is from hard data from Mars.

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An icy Martian crater filled with brain terrain

11:42 am

An icy Martian crater filled with brain terrain
Click for original image.

Cool image time! The picture to the right, rotated, cropped, and reduced to post here, was taken on March 26, 2026 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It shows what the scientists label an “ice-rich crater fill.”

And yup, that’s what we got. The floor of this 2.8-mile-wide unnamed crater is filled with what planetary scientists have labeled brain terrain, a feature found only on Mars that they associate with the sublimation of near surface ice, but as yet do not fully understand its entire formation process. In the upper right is a full resolution inset of that brain terrain, to give a good sense of its strange nature.

On that floor there are also several small fresh impact craters, as well as older small impacts that have faded almost to obscurity due to that mysterious process forming the brain terrain.

Its iciness of the terrain is also indicated by the rim of the crater, which is distorted as well as blobby. At impact or subsequently the ground here was soft like mud, and thus easy to shape into these cushioned features. Thus, though the rim was almost certainly circular after impact, time and the muddy nature of this ground allows it to get bent and warped.

Nor is it surprising there is near surface ice at this location. We are at 41 degrees south latitude, well away from the dry Martian tropics. This picture simply provides more evidence that once you get above 30 degrees latitude, it will not be hard to find water on Mars.
» Read more

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New long term analysis of solar activity suggests the Sun is undergoing some form of internal structural change

9:36 am

Sunspot activity for the past two cycles
NOAA’s chart of sunspot activity.
Click for the most recent update.

The uncertainty of science: Scientists doing a new analysis of more than forty years of solar data have concluded that some form of “subsurface structural changes associated with successive 11-year [sunspot] cycles” are taking place, with those changes “ever more progressively confined just beneath the solar surface.”

Using almost 40 years of helioseismic data from six telescopes around the world in the Birmingham Solar Oscillations Network (BiSON), the researchers uncovered a gradual change in structure just beneath the surface that has spanned multiple cycles, with the current solar cycle 25 showing particularly strong signatures of these changes.

Lead author Professor Bill Chaplin, from the University of Birmingham, said: “The Sun has its own ‘active biorhythm’ creating rising and falling magnetic activity that shapes space weather. However, traditional surface measures don’t capture the full story – that the Sun may be entering a different mode of behaviour unfolding over decades.

“We have uncovered evidence of systematic changes in the solar activity cycle. Crucially, magnetic activity is becoming more tightly confined near the surface with each cycle.”

The confinement appears to be within the first 600 miles below the surface, which for the Sun is barely skin deep.

In reading the paper [pdf], it is very clear they have detected these changes, but are as yet unable to apply them to any larger fundamental processes. They are observing the Sun change, but don’t know why. It could be simply random fluctuations of behavior, or it could be part of the Sun’s normal behavior related to its magnetic field and the nuclear fusion that makes it burn.

In either case, this lack of deeper understanding means it is impossible as yet to predict what will happen next, or how those future changes will impact us here on Earth.

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New study using Chandrayaan-2 data again suggests ice in crater near Moon’s south pole

9:06 am

The Moon's south pole region

The uncertainty of science: A new study by scientists in India using data from the Indian lunar orbiter Chandrayaan-2 has once again found evidence strongly suggesting the existence of water ice in several permanently shadowed craters near Moon’s south pole.

The findings are based on observations made by the Chandrayaan-2 orbiter’s Dual Frequency Synthetic Aperture Radar (DFSAR), a sophisticated microwave imaging instrument capable of probing beneath the lunar surface.

Among the craters examined, scientists found particularly strong evidence of subsurface ice in a 1.1-kilometre-wide crater located within the larger Faustini crater near the Moon’s south pole. Researchers said the crater displayed a distinctive “lobate-rim morphology”- a flow-like structural pattern that may indicate the impact event penetrated an ice-rich subsurface layer.

On the map above the green dot to the right of the south pole marks the location of the small crater inside Faustini Crater. Their conclusions were based first on microwave data suggesting subsurface ice, and second on the lobate shape of this crater’s rim, which has a kind blobby look implying the material is muddy and impregnated with ice.

Increasingly the data from all sources seems to suggest that if there is ice in these permanently shadowed craters, it is likely impregnated in the soil, and will require processing to extract.

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Colorful Martian dunes

12:00 pm

Colorful Martian dunes
Click for original image.

Cool image time! The picture to the right, cropped to post here, was taken on March 15, 2026 by the high resolution camera on Mars Reconnaissance Orbiter (MRO).

The science team labels the image a “dune field.” What struck me immediately however was the vast range of colors, something that is usually not seen on Mars. Within a very short distance we go from bright orange to dark blue, with the change sometimes exceedingly sharp.

The orange is likely coarser rocks or bedrock, while the dark blue patches are likely piles of sand that has piled up due to prevailing winds. Why the dunes on the upper plateau change from bright orange to dark blue however is an unknown.

And why the patches of dust remain undefined is also a mystery. Dust on Mars is generally organized into dunes by the wind. It isn’t here.
» Read more

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