Tag: science

Another great hiking location on Mars

12:20 pm

Another great hiking location on Mars
Click for original image.

In honor of our just completed visit to the south rim of the Grand Canyon, today’s cool image takes us to another location on Mars that to me appears a perfect place to install some hiking trails. The picture to the right, cropped, reduced, and sharpened to post here, was taken on June 30, 2025 by the high resolution camera on Mars Reconnaissance Orbiter (MRO).

The image shows a two-mile wide canyon with a number of scattered narrow mesas within. The north and south rims rise about 550 feet above the canyon floor. The two mesas labeled “A” and “B” rise about 200 and 100 feet respectively.

The hiker in me immediately imagines what a great hike it would be to go up the western nose of either ridge and walk along its crest. The knife-edge nature of ridge “A” would mean that for a large majority of the hike you’d be at the north and south edges at the same time.
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Sand dunes inside the Martian north polar icecap

12:32 pm

Sand dunes inside the Martian north polar icecap
Click for original image.

Today’s cool image returns to the Martian north pole. The picture to the right, rotated, cropped, reduced, and enhanced to post here, was taken on July 3, 2025 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It shows the top of a ridge near the edge of that icecap, with dunes visible in the hollow several thousand feet below.

The angle of this picture does not show us the many layers on the cliff leading down to those dunes. It does show evidence, however, of the top few layers on the flat crest of that ridge. The white lines delineate those layers, each line marking the edge of a series of wide terraces.

The dunes in the canyon below are of interest because their source is likely the dust that is mixed into thick icecap’s ice. As that ice sublimates away on the face of the cliff, the dust falls into the canyon, where it is trapped.
» Read more

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The beauty of Mars’ many-layered northern icecap

12:45 pm

The beauty of Mars' ice cap
Click for original image.

Cool image time! The picture to the right, rotated, cropped, reduced, and sharpened to post here, was taken on July 1, 2025 by the high resolution camera on Mars Reconnaissance Orbiter (MRO).

The science team labels it clumsily as “North Polar layered deposits structural geology in icy layers”. What we see are the many layers that make up the north polar cap, produced by the red planet’s many climate cycles that scientists think Mars has undergone over the eons as the red planet’s rotational tilt, or obliquity, rocked back and forth from 11 degrees inclination to as much as 60 degrees. At the extremes, the ice cap was either growing or shrinking, while today (at 25 degrees inclination) it appears to be in a steady state.

These layers are a mixture of ice and dust. The variations from dark to light likely indicate changes in the amount of dust in the atmosphere. Dark layers suggest the atmosphere was more dusty due to volcanic eruptions. Light layers suggest the planet’s volcanic activity was more subdued.

At least that’s one hypothesis.
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Wind-eroded terrain on the edge of Mars’ largest volcanic ash field

12:36 pm

Wind-eroded terrain in Mars' largest volcanic ash field

Cool image time! The picture to the right, cropped and sharpened to post here, was taken on July 2, 2025 by the high resolution camera on Mars Reconnaissance Orbiter (MRO).

Labeled simply as “wavy terrain” by the MRO science team, it shows a relatively flat plain of hollows and terraced ridges that suggest the prevailing winds come from the west-southwest. As they blow, they slowly cause the layers of material to peel away, exposing those terraces.

This wavy landscape extends for many miles to the west, covering a region 135 by 160 miles in area. The layering and wavy nature of the terrain suggests the material here is fragile and easily peeled away by the winds of Mars’ very thin atmosphere. Think of the sandstone that forms Monument Valley and Canyonlands in the southwest United States, shaped almost entirely by wind.

And in fact, the overview map below confirms this.
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Junk science now dominates the reporting of the propaganda press

12:32 pm

The Sciences, when science journalism focused on reporting real discoveries
The Sciences, when the goal of science journalism
was to report real discoveries

When I started my career as a science journalist in the early 1990s, Peter Brown, the editor of award-winning magazine The Sciences (now sadly discountinued), assigned me the job of writing short news pieces. He pointed at a three-foot-high pile of press releases, and suggested I go through them to find some scientific discovery worth reporting.

As I went through this pile each month, I found that 90% described results that while interesting certainly did not merit any news coverage. Many described theories that “might” or “could” be true, hardly examples of solid new knowledge. I would find a handful of releases worth a news report, while the remaining 90% would get thrown in the dumpster.

Unfortunately, limited space in the magazine often meant that only one of the stories I thought worthwhile would be reported, but it also meant the story we picked was of real significance. The reader was guaranteed to read about important research results, because the technology then forced us to be discriminating.

That was then. Today, things are very different. The web allows modern news outlets to report about practically every press release they get. Nothing gets thrown away. If anything, new outlets today relish reporting on the least significant science results, merely because the scientists speculate about some amazing final events that “might,” “could,” or “may” happen, if their theories are right. The press eats this junk science up, because it produces great clickbait that, while as vapid as cotton candy, sounds really cool or exciting. That these speculations have no basis in reality is irrelevant.

To give you an idea of what I mean, here are a few examples from our modern propaganda press that I have gathered in just the past week:
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New Horizons placed in hibernation, possibly forever

9:05 am

The science team running the New Horizons probe, now more then 5.7 billion miles from Earth, has placed the spacecraft into what will be its longest hibernation period so far, with the possibility that it could even last forever.

New Horizons, which had been in active data-collection mode since April, will now remain in hibernation. Pending a final Fiscal Year 2026 budget, the spacecraft may be awoken in late June 2026. This will be the longest hibernation period of the mission so far, surpassing the previous mark of 273 days from June 2022 to March 2023.

But the spacecraft won’t be completely at rest; New Horizons will continue to take round-the-clock measurements of the charged-particle environment in the Sun’s outer heliosphere and the dust environment of the Kuiper Belt using three different onboard scientific instruments. These data will be transmitted back to Earth when New Horizons wakes up. [emphasis mine]

Though the NASA press release puts up an optimistic front, it is very likely that this hibernation period will last significantly longer than planned, due to those budget negotiations. Trump’s budget proposes eliminating all funding for New Horizons, which will mean this hibernation period will be permanent. There will be no money to hire anyone to reactivate it.

Even if the budget is cut, it is probable that NASA management in the future will provide some cash. At the moment there is little for it to observe on a daily basis. All that needs to be done is to turn it on for short periods to download the heliosphere data. Management could simply decide to turn it on once every five years or so.

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Using Webb astronomers have for the first time identified the source of a fast radio burst

12:02 pm

Fast Radio Burst source

Astronomers using the Webb Space Telescope have now successfully pinpointed a specific object that appears to be the source for a fast radio burst (FRB), extra-galactic short bursts of radio energy whose cause and origin have up-to-now been unexplained.

Blanchard and his team used a discovery of an FRB in a nearby galaxy made with the CHIME Outriggers array, a radio telescope in Canada, which was recently upgraded to enable FRB detections with precise positions. The researchers then turned to NASA’s James Webb Space Telescope to look for an infrared signal from the same location.

…The infrared data revealed an object, dubbed NIR-1, that is likely a red giant star or possibly a middle-aged massive star. A red giant is a Sun-like star near the end of its life that has expanded and brightened, while the other possibility is a star much more massive than the Sun.

Although these stars are unlikely to directly produce FRBs, the scientists say, they may have an unseen companion, such as a neutron star, pulling material away from the red giant or massive star. This process of transferring mass

The burst itself occurred on March 16, 2025 about 130 million light-years away in the galaxy NGC 4141. You can read the discovery paper here [pdf].

There remain of course great uncertainties. For one, NIR-1 is itself not likely the cause of the FRB, but related to its source in some manner. The scientists posit a number of explanations, from either an unseen magnetar (a pulsar with a powerful magnetic field), or a flare from this massive star reflecting off that unseen magnetar.

Regardless, this discovery helps narrow the theories considerably.

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Slumping landslide in Mars’ glacier country

11:40 am

Overview map

Slumping landslide in Mars' glacier country
Click for original image.

Cool image time! The picture to the right, rotated, cropped, reduced, and sharpened to post here, was downloaded on July 1, 2025 from the high resolution camera on Mars Reconnaissance Orbiter (MRO).

Labeled by the science team as a “flow,” it shows what appears to be a major collapse of the canyon’s south wall. The white dot on the overview map above marks the location, near the center of the 2,000-mile-long strip in the northern mid-latitudes of Mars that I label “glacier country” because almost every single high resolution image of this region shows glacial features.

This picture is no exception. First, the canyon appears filled with a glacial material, though its flow direction is unclear. Orbital elevation data suggests that this collapse is actually at the canyon’s high point, with the drainage going downhill to the east and west.

Second, the collapse itself doesn’t look like an avalanche of rocks and bedrock, but resembles more a mudslide. Since liquid water cannot exist in Mars’ thin atmosphere and cold climate, the soft nature of the slide suggests it is dirt and dust impregnated with ice. At some point, either because of the impacts that created the craters on its southern edge or because the sun warmed the ice causing it sublimate away thus weakening the ground structurally, the entire cliff wall slumped downward to the north.

The canyon itself is about 800 feet deep. It likely formed initially along a fault line, with ice acting over time to widen and extend it.

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Meteorite that crashed through roof of home in Georgia dated to beginning of solar system

11:40 am

A meteorite that crashed through the roof of a home in Georgia in June 2025 has now been dated to have formed 4.56 billion years ago, to a time when the solar system was just beginning to form.

[The University of Georgia] received 23 grams of the 50 recovered from the piece that penetrated the house. Using optical and electron microscopy to analyze the fragments, Harris says he believes the meteorite to be a Low Metal (L) ordinary Chondrite. That classification means he expects the meteorite to have formed 4.56 billion years ago in the presence of oxygen — older than the Earth itself.

“It belongs to a group of asteroids in the main asteroid belt between Mars and Jupiter that we now think we can tie to a breakup of a much larger asteroid about 470 million years ago,” Harris said. “But in that breakup, some pieces get into Earth-crossing orbits, and if given long enough, their orbit around the sun and Earth’s orbit around the sun end up being at the same place, at the same moment in time.”

There has been a lot of unjustified hype in the mainstream press about this story, mostly about the age of the meteorite. The fact is that this age for a meteorite is simply not a surprise, that almost all chondrite meteorites found are of comparable age, coming from the beginnings of the solar system.

The most unusual part of the story is that the impact occurred through a person’s house. Such events are exceedingly rare. That it happened however was actually fortuitous, in that, first, no one was hurt, and second, it allowed the meteorite to be quickly recovered and analyzed.

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Webb discovers another “oldest black hole”

12:34 pm

The uncertainty of science: Using the Webb Space Telescope, astronomers now claim they have detected a super-massive black hole at a new record-setting distance that puts it far closer to the Big Bang that cosmologists have predicted.

A global team of astronomers, led by The University of Texas at Austin’s Cosmic Frontier Center, has confirmed the discovery of the most distant black hole ever observed. This black hole resides within a galaxy known as CAPERS-LRD-z9, which existed only 500 million years after the Big Bang.

In other words, the light we see from it has traveled 13.3 billion years, revealing the universe at just 3% of its current age.

The black hole, estimated to have the mass of 300 million suns, sits in the center of one of the mysterious “little red dots” that Webb has discovered in the early universe that remain a mystery. This black hole suggests each is an early galaxy with its own super-massive black holes.

I must note that there is great uncertainty in the claim of a black hole discovery. It is based on the spectroscopic emissions detected by Webb, which had features generally seen only in super-massive black holes in the recent universe. Thus, the scientists are making some large assumptions in concluding those emissions also indicate a super-massive black hole in this little red dot.

We must also note that if this black hole really exists, it confounds the theories of cosmologists as to the formation of the universe. It is too soon after the Big Bang for such a black hole to have formed, according to those theories.

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Psyche snaps picture of Earth-Moon system

9:42 am

Earth and Moon, as seen by Psyche
Click for original image.

In a successful test of its cameras and pointing capabilities, the science team operating the probe Psyche — on its way to the asteroid Psyche — were able to snap a picture of Earth-Moon system from about 180 million miles away.

On July 20 and July 23, the spacecraft’s twin cameras captured multiple long-exposure (up to 10-second) pictures of the two bodies, which appear as dots sparkling with reflected sunlight amid a starfield in the constellation Aries.

One of those pictures is shown to the right. The scientists had previously taken similar calibration images of Jupiter and Mars.

To determine whether the imager’s performance is changing, scientists also compare data from the different tests. That way, when the spacecraft slips into orbit around Psyche, scientists can be sure that the instrument behaves as expected. “After this, we may look at Saturn or Vesta to help us continue to test the imagers,” said Jim Bell, the Psyche imager instrument lead at Arizona State University in Tempe. “We’re sort of collecting solar system ‘trading cards’ from these different bodies and running them through our calibration pipeline to make sure we’re getting the right answers.”

The spacecraft is scheduled to arrive at the metal asteroid Psyche in 2029, and will then spend at least two years flying in formation with it.

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Scientists link near Earth asteroids Bennu and Ryugu to much larger main belt asteroid

9:29 am

Ryugu and Bennu

Scientists comparing the spectroscopy of samples returned from the near Earth asteroids Bennu and Ryugu have found they closely resemble the much larger main belt asteroid Polana, suggesting all three formed at the same time and place.

You can read the paper here [pdf] From the press release:

The study compared spectroscopy data from Polana with spacecraft and laboratory data from Bennu and Ryugu samples, discovering similarities in their near-infrared spectrum sufficient to support the theory that they originate from the same parent asteroid. “Very early in the formation of the solar system, we believe large asteroids collided and broke into pieces to form an ‘asteroid family’ with Polana as the largest remaining body,” said SwRI’s Dr. Anicia Arredondo, lead author of the study. “Theories suggest that remnants of that collision not only created Polana, but also Bennu and Ryugu as well.”

While the similarities are great, the paper notes there are differences, possibly from “space weathering, particle size, surface texture, or different compositions.” The scientists believe the differences were caused by the asteroids’ different environments, with the 33-mile-wide and much older Polana in the asteroid belt beyond Mars, and Ryugu and Bennu, both less than a mile wide, orbiting the Sun inside Mars.

It is also possible the asteroids have little to do with each other, and the similar spectroscopy only informs us of some of the more common components of the early solar system.

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Colorful spiral galaxy

9:25 am

A colorful spiral galaxy
Click for original image.

Cool image time! The picture to the right, reduced and sharpened to post here, was taken by the Hubble Space Telescope as part of a survey of nineteen nearby galaxies. The galaxy, NGC 2835 and 35 million light years away, has been imaged many times in the past, but the new image contacts new wavelength data designed to identify nebulae. From the caption:

This image differs from previously released images because it incorporates new data from Hubble that captures a specific wavelength of red light called H-alpha. The regions that are bright in H-alpha emission can be seen along NGC 2835’s spiral arms, where dozens of bright pink nebulae appear like flowers in bloom. Astronomers are interested in H-alpha light because it signals the presence of several different types of nebulae that arise during different stages of a star’s life. Newborn massive stars create nebulae called H II regions that are particularly brilliant sources of H-alpha light, while dying stars can leave behind supernova remnants or planetary nebulae that can also be identified by their H-alpha emission.

Compare this image with the 2020 photo. The spiral arms are now alive with red and blue features not seen previously.

This survey hopes to find 50,000 nebula in the galaxies being observed.

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Gullies on a crater wall in the icy north of Mars

1:23 pm

Gullies on a crater wall
Click for original image.

Cool image time! The picture to the right, cropped, reduced, and sharpened to post here, was taken on July 4, 2025 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It shows the lower right quadrant of a five-mile-wide unnamed crater in the high northern mid-latitudes of Mars.

The science team in its label for this picture focuses on the gullies visible on the crater’s interior wall. To my Earth-bound eye, these gullies look like recent erosion caused by underground ice sublimating into gas, causing the surface to collapse downward into the crater. This however is a purely uneducated guess.

The floor of the crater however shows features that resemble glacial fill, seen in numerous high latitude craters on Mars. This is not surprising, as the crater is located at 59 degrees north latitude, close enough to the pole for there to be a lot of near surface ice to be present.
» Read more

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Slope streaks within Mars’ largest mountain region

1:51 pm

Overview map

Today’s cool image revisits Lycus Sulci, the largest mountain range on Mars, about 1,400 mile wide and 1,800 miles long. The overview map to the right gives a sense of the roughness and chaotic nature of this region, extending north from Mars’ largest volcano, Olympus Mons.

At present scientists are unsure of the geology that formed Lycus Sulci, and how it is linked with Olympus Mons. The wide view to the right suggests it is the remains of a very ancient lava flow descending from the volcano that over time has become eroded to produce this wildly knobby terrain. That hypothesis remains unproven however. There is also evidence that the material here might instead be volcanic ash, deposited in many layers and eroded away with time.

The location of the cool image below is marked by the white dot, with the inset providing us a wider view of the surrounding terrain. Note the two craters to the north and west. Both appear to have been partly filled by flows coming from the south and east, respectively, adding weight to the theory that this region formed from lava flow.
» Read more

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Webb: An Earth-sized exoplanet in habitable zone appears to lack an atmosphere

10:17 am

Scientists using the Webb Space Telescope have concluded that an Earth-sized exoplanet, orbiting the red dwarf star Trappist-1 in the habitable zone, does not appear to have an atmosphere, or if it does have one it is not like Earth’s.

The TRAPPIST-1 system is located 40 light-years away and was revealed as the record-holder for most Earth-sized rocky planets around a single star in 2017, thanks to data from NASA’s retired Spitzer Space Telescope and other observatories. Due to that star being a dim, relatively cold red dwarf, the “habitable zone” or “Goldilocks zone” – where the planet’s temperature may be just right, such that liquid surface water is possible – lies much closer to the star than in our solar system. TRAPPIST-1 d, the third planet from the red dwarf star, lies on the cusp of that temperate zone, yet its distance to its star is only 2 percent of Earth’s distance from the Sun. TRAPPIST-1 d completes an entire orbit around its star, its year, in only four Earth days.

Webb’s NIRSpec (Near-Infrared Spectrograph) instrument did not detect molecules from TRAPPIST-1 d that are common in Earth’s atmosphere, like water, methane, or carbon dioxide.

You can read the paper here [pdf].

The likelihood of life on this exoplanet has always been slim, simply because it orbits so close to the red dwarf, where it is vulnerable to the high energy flares the star periodically releases.

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New study: Both PR departments and the press love to speculate wildly about science, even when the scientists don’t

1:28 pm

The attitude of our modern press about science
The attitude of our modern press about science

A new study looking at 630 articles in popular press about the study of astrobiology (the possibility of life on other worlds) found that the press frequently exaggerated the findings, often taking relatively minor results that only vaguely and with great uncertainty suggested the presence of biology to speculate wildly that life had been found.

The research also found that university public relations departments tended to encourage this behavior with their own speculations in press releases. From the paper’s abstract:

Findings reveal that speculations and promises/expectations are more frequent in news articles and press releases compared to academic papers. Speculations about conditions for life and the existence of life beyond Earth are common, particularly in news articles covering exoplanet research, while promises of life detection are rare. Press releases tend to emphasize the significance of research findings and the progress of the field. Speculations and promises/expectations in news articles often occur without attribution to scientists and in quotes of authors of the studies, and slightly less so in quotes of outside experts. [emphasis mine]

The study looked at articles from the New York Times in the U.S., the Guardian in the United Kingdom, Folha and Estadão in Brazil, Público in Portugal, and El País in Spain. It consistently found these news sources consistently exaggerated the discoveries, often speculating with little evidence that the research had found evidence of life.

This paper merely confirms what I have reported repeatedly in the past few years. When scientists report that they may have detected a molecule in Venus’s atmosphere that on Earth is associated with life, the press immediately screams “Life found on Venus!” Or if scientists detect with great uncertainty similar life-related molecules in an exoplanet’s atmosphere and gently suggest it might mean life, the press screams “Exoplanet has life!”

In both these examples the research was very uncertain, and in both later research failed to confirm these conclusions.

Sadly this pattern now applies to almost every scientific result. Uncertain results based not even on observations but on theories are routinely touted these days by both press departments and news outlets as big discoveries, even if they are only describing uncertain theories that may prove true.

In fact, words like “may”, “might,” or “could” in headlines are always a give-away. They tell you that the story is not about an actual discovery, but a speculation that remains unproven. Such stories rarely get linked to here at Behind the Black, and if I do link to them, I spend a lot of time noting the uncertainties and weakness of the research.

If only all news outlets did the same.

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When Martian lava meets a Martian mountain

12:17 pm

When Martian lava meets a Martian mountain
Click for original image.

Cool image time! The picture to the right, rotated, cropped, reduced, and sharpened to post here, was taken on April 24, 2025 by the high resolution camera on Mars Reconnaissance Orbiter (MRO), and was posted yesterday by the science team to illustrate the vast lava flows that cover much of Mars. From the caption:

This image captures the edge of a lava flow that partially buries older terrain in the Martian Southern Highlands. Where the edge of the lava flow made contact with the higher-standing topography, it formed a rumpled and ridged surface.

This lava flow is one of many massive flows that extend southwest from Arsia Mons, one of the largest shield volcanoes on Mars.

The mountain to the south rises about 3,700 feet above that rumpled lava ocean at its base.
» Read more

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Two companies to study ways for extending the life of the Gehrels Swift space telescope

9:15 am

NASA yesterday announced that it has awarded two companies, Cambrian Works in Virginia and Katalyst Space Technologies in Arizona, each $150K study contracts for reviewing whether it makes sense to send a robotic servicing mission to Gehrels Swift space telescope to raise its orbit and extend its life.

Since its launch in 2004, NASA’s Swift mission has led the agency’s fleet of space telescopes in investigating changes in the high-energy universe. The spacecraft’s low Earth orbit has been decaying gradually, which happens to most satellites over time. Because of recent increases in the Sun’s activity, however, Swift is experiencing additional atmospheric drag, speeding up its orbital decay. This lowering orbit presents an opportunity for NASA to advance a U.S. industry capability, while potentially extending the science lifetime of the Swift mission. The concept studies will help determine whether extending Swift’s critical scientific capabilities would be more cost-effective than replacing those capabilities with a new observatory.

According to this paper [pdf], the telescope’s orbit will decay before the end of 2029, so speed is of the essence. Why NASA is thus spending time and money on a “study” contract from companies that don’t do orbital servicing or have orbital tugs is very curious. Wouldn’t make more sense to request bids from the many orbital servicing and tug companies that now exist (D-Orbit, Astroscale, Northrop Grumman, Firefly, Blue Origin, Rocket Lab, Impulse) to see if any can do the job at a reasonable cost and are willing?

Gehrels Swift has proven to be one of the most valuable and useful high energy space telescopes ever launched. First of all its cost was relatively low. Second, it is designed to quickly observe a gamma ray burst (GRB) location in multiple other wavelengths (optical especially). That ability helped solve the mystery of GRBs, as well as numerous other high energy events. It would be a tragedy to lose it.

It would also be far more expensive to build a replacement.

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Radar images of near Earth asteroid as it zipped past the Earth

9:11 am

Radar images of near Earth asteroid
Click for original. Go here for movie made from these images.

Using the Goldstone radar antenna in California, astronomers have produced a series of 41 radar images of the near Earth asteroid 2025 OW as it made a close pass of the Earth on July 28, 2025.

Those images, cropped, reduced, and sharpened to post here, are to the right.

The asteroid safely passed at about 400,000 miles (640,000 kilometers), or 1.6 times the distance from Earth to the Moon.

The asteroid was discovered on July 4, 2025, by the NASA-funded Pan-STARRS2 survey telescope on Haleakala in Maui, Hawaii. These Goldstone observations suggest that 2025 OW is about 200 feet (60 meters) wide and has an irregular shape. The observations also indicate that it is rapidly spinning, completing one rotation every 1½ to 3 minutes, making it one of the fastest-spinning near-Earth asteroids that the powerful radar system has observed. The observations resolve surface features down to 12 feet (3.75 meters) wide.

The asteroid’s fast rotation suggests it is a solid object, structurally strong, rather than a rubble pile held together loosely by gravity. It would thus be very damaging if it should ever hit the Earth.

No worries however. The refined orbital data says this asteroid will not come this close again in the foreseeable future.

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