Tag: engineering

Monitoring gullies on Mars for changes

12:25 pm

Overview map

Monitoring gullies on Mars
Click for original image.

Cool image time! The picture to the right, cropped, reduced, and enhanced to post here, was taken on June 29, 2024 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). The scientists label the picture simply as “gully monitoring,” with an apparent goal of looking to see if this gully has changed since MRO took the first high resolution image two years previously. In the interim this terrain went from Martian spring, through summer and winter, and has now returned to spring.

As far as I can tell, no changes are visible, but then I am not using the highest resolution data available. Small changes might be detectable in the highest resolution using good detection software. Overall, the gully drops about 3,000 feet.

The white dot in the overview map above marks the location, on the southwest interior rim of an unnamed 30-mile wide crater. This region in the Martian cratered highlands was featured in a four part cool image series I did back 2023 (here, here, here, and here), with this as my conclusion:

Overall, our short survey of the southern cratered highlands suggests that the glacial material and ice found in the southern mid-latitudes affects the Martian surface differently than in the northern lowland plains. In the north the craters and the surrounding terrain often appear blobby, as if the ice is close to the surface and also a dominant component of the ground. Impacts therefore cause significant soft melt features, with craters often heavily distorted. Similarly, there is evidence of the existence of past mud volcanoes that once spewed water and mud from below ground.

In the south however the surface is at a higher elevation, and it appears the ice layer is deeper underground. Thus, it appears the ground is more firm, and the only obvious evidence of an underground layer of ice is revealed when sublimation and the subsequent erosion produce these large pits inside craters.

In the case of this crater, a small impact on its interior southwest slope apparently caused that underground layer of ice to melt temporarily and flow downhill, leaving behind the gully and flow features we see today. Based on the two MRO pictures taken a full Martian year apart, it appears the feature is generally stable and thus likely old, left over from that impact. If things are changing seasonally they are doing so in small amounts and slowly.

2 comments

Amateur gets new image of China’s X-37B copy in orbit

9:42 am

An amateur astronomer, Felix Schöfbänker, has released a new picture he took of China’s X-37B-type reusuable mini-shuttle while it was in orbit and prior to its landing on September 6, 2024.

The picture is low resolution and not very pretty, but it does appear to show that the mini-shuttle has a delta wing design.

While the recent space plane flight was underway, space watcher veteran Felix Schöfbänker in Upper Austria took imagery of the craft. In a recent posting, Schöfbänker reported he has imagery taken Aug. 10 of the Chinese space plane which shows a delta-wing design, captured when the craft turned 180 degrees since an earlier observation he made on July 30.

Schöfbänker also theorizes that the dark area between the wings could be the mini-shuttle’s cargo bay.

0 comments

A puzzling striped rock on Mars

9:32 am

A striped rock on Mars
Click for original image.

Cool image time! The picture to the right, cropped, reduced, and sharpened to post here, was taken on September 13, 2024 by one of the high resolution cameras on the Mars rover Perseverance. The rock’s striped nature makes it unique, unlike any feature spotted by any rover previously. From an update today:

The science team thinks that this rock has a texture unlike any seen in Jezero Crater before, and perhaps all of Mars. Our knowledge of its chemical composition is limited, but early interpretations are that igneous and/or metamorphic processes could have created its stripes. Since Freya Castle [the name the science team gave the rock] is a loose stone that is clearly different from the underlying bedrock, it has likely arrived here from someplace else, perhaps having rolled downhill from a source higher up. This possibility has us excited, and we hope that as we continue to drive uphill, Perseverance will encounter an outcrop of this new rock type so that more detailed measurements can be acquired.

Without doubt the rock’s rounded surface suggests it was ground smooth by either water or ice. That surface certainly resembles glacial cobble seen across the northeast of the U.S. where ice glaciers once covered the entire landscape. The rock also resembles river cobble, smoothed by flowing water.

The stripes however suggest that prior to its being smoothed, this rock underwent a much more complex geological process, whereby two different materials were intermixed and squeezed together.

3 comments

China launches five satellites

9:02 am

China today successfully launched five satellites, its Kinetica-1 rocket (Lijian-1 in Chinese) lifting off from its Jiuquan spaceport in northwest China.

China’s state-run press generally attempts to describe this rocket as commercial and built by one of its pseudo-companies, but in this case that is even more dishonest. CAS Space was created from a government space division as a separate subsidiary, and thus is wholly controlled, funded, and owned by that agency. Unlike China’s other pseudo-companies, it didn’t even bother to go through the dance of raising investment capital or winning contracts.

Nonetheless, company officials now boast — after this fourth launch of this rocket — they are about to begin launching monthly. No word on where the rocket’s lower stages crashed inside China.

Meanwhile, China also today publicly announced a successful ICBM test launch into the Pacific, the first time it has made such an test or public announcement in four decades. It released almost no details, however, including where the missile was launched or where it splashed down.

The leaders in the 2024 launch race:

94 SpaceX
43 China
11 Russia
11 Rocket Lab

American private enterprise still leads the rest of the world combined in successful launches 110 to 65, while SpaceX by itself now leads the entire world, including American companies, 94 to 81.

0 comments

SpaceX launches 21 more Starlink satellites

9:09 pm

SpaceX tonight successfully launched another 21 Starlink satellites, its Falcon 9 rocket lifting off from Vandenberg in California.

The first stage completed its tenth flight, landing on a drone ship in the Pacific.

The leaders in the 2024 launch race:

94 SpaceX
42 China
11 Russia
11 Rocket Lab

American private enterprise now leads the rest of the world combined in successful launches 110 to 64, while SpaceX by itself now leads the entire world, including American companies, 94 to 80.

The United States has now tied its record for launches in a single year, 110, set only last year. It has done so however in less than three-quarters of a year, suggesting that the new record will be significantly higher. This new record mostly reflects the pace that SpaceX and Rocket Lab are setting, with most of the heavy lifting by SpaceX.

If things go as expected, expect 2025 to smash this record as well, because all signs suggest that both ULA and Blue Origin will begin launching regularly in order to meet their various contracts, joining SpaceX, Rocket Lab, and several other rocket startups.

0 comments

FAA administrator claims SpaceX wasn’t following regulations; SpaceX says that’s false

4:08 pm

FAA administrator Mike Whitaker today said this to SpaceX:
FAA administrator Mike Whitaker today to SpaceX:
“Nice company you have there. Shame if something
happened to it.”

In a hearing today before the House transportation committee, the FAA administrator Mike Whitaker claimed repeatedly that the red tape his agency has imposed on SpaceX, as well as the fines it recently imposed on the company, were due to safety concerns as well as SpaceX not following the regulations and even launching without a license.

Mike Whitaker, the administrator of the FAA, told lawmakers on the House Transportation Committee that his decision to delay SpaceX’s launch for a few months is grounded in safety, and defended the $633,000 fine his agency has proposed against SpaceX as the “only tool” the FAA has to ensure that Musk’s company follows the rules.

… [Kevin Kiley (R-California)] argued those reviews don’t have anything to do with safety, prompting Whitaker to shoot back: “I think the sonic boom analysis [related to returning Superheavy back to Boca Chica] is a safety related incident. I think the two month delay is necessary to comply with the launch requirements, and I think that’s an important part of safety culture.”

When Kiley asked what can be done to move the launch up, Whitaker said, “complying with regulations would be the best path.”

SpaceX immediately responded with a detailed letter, published on X, stating in summary as follows:

FAA Administrator Whitaker made several incorrect statements today regarding SpaceX. In fact, every statement he made was incorrect.

The letter then detailed very carefully the falseness of each of Whitaker’s claims. You can read images of the letter here and here. The company noted:

It is deeply concerning that the administrator does not appear to have accurate information immediately available to him with respect to SpaceX licensing matters.

Based on SpaceX’s detailed response, it appears its lawyers are extremely confident it has a very good legal position, and will win in court. Moreover, the politics strongly argue in favor of fighting now. Though such a fight might delay further Superheavy/Starship test launches in the near term, in the long run a victory has a good chance of cleaning up the red tape for good, so that future work will proceed without this harassment.

Whitaker’s testimony also suggests strongly that he — a political appointee by the Biden administration –is likely the source of many of the recent delays and increased red tape that SpaceX has been forced to endure. He clearly thinks he knows better than SpaceX on these technical areas, even though his education and work history has never had anything to do with building rockets.

21 comments

Layered mesas in Martian chaos

12:27 pm

Layered mesas in Martian chaos
Click for original image.

Cool image time! The picture to the right, rotated, cropped, reduced, and sharpened to post here, was taken on May 19, 2024 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It shows a 2,500 to 3,000-foot-high mesa with what the scientists call “bedrock layers”, most obvious as the lower terraces on the mesa’s western slopes.

What makes this mesa especially interesting is its overall shape. It appears as if something has taken a bite out of it, resulting in that bowl-like hollow on the mesa’s southern half.

Was this caused by an impact? Or has some other long term Martian processes caused it?

This mesa is just one of many mesas in a region of chaos terrain dubbed Hydraotes Chaos. Such chaos terrain is thought to form when erosion processes, possibly glacial in nature, that carve out canyons along faultlines, leaving behind mesas with randomly oriented canyons cutting in many directions.
» Read more

4 comments

Observations of solar flares do not match the standard model used to explain their origin

9:47 am

The uncertainty of science: When scientists carefully compared new and much more precise observations of the Sun’s solar flares with the standard model they have used for decades to explain their origin, they found unexpected differences, suggesting the model is wrong or imcomplete.

In sum, none of the processes simulated in accordance with the model proved capable of explaining the observational data. The conclusion drawn by the researchers was obvious to some extent: the standard model of solar flares needs to be reformulated, as required by the scientific method.

The scientists found that the two sources of each flare brightened at slightly different times. The model said these sources should brighten almost simulatanously, and no version of the model could explain the contradiction.

All this means is that the researchers simply don’t have enough data or understanding of the Sun to formulate a model that can fully explain the process. This study simply demonstrates this, but also provides a guide for soliving the problem.

12 comments

Bioengineered heart samples on ISS confirm that weightlessness weakens and ages the heart

9:33 am

Using 48 bioengineered heart samples that spent 30 days on ISS in 2020, scientists have confirmed other research that showed weightlessness not only weakens the heart, it ages it as well.

In addition to losing strength, the heart muscle tissues in space developed irregular beating (arrhythmias)—disruptions that can cause a human heart to fail. Normally, the time between one beat of cardiac tissue and the next is about a second. This measure, in the tissues aboard the space station, grew to be nearly five times longer than those on Earth, although the time between beats returned nearly to normal when the tissues returned to Earth.

The scientists also found, in the tissues that went to space, that sarcomeres—the protein bundles in muscle cells that help them contract—became shorter and more disordered, a hallmark of human heart disease. In addition, energy-producing mitochondria in the space-bound cells grew larger, rounder and lost the characteristic folds that help the cells use and produce energy.

Finally …[t]he tissues at the space station showed increased gene production involved in inflammation and oxidative damage, also hallmarks of heart disease.

None of this is ground-breaking, as it confirms numerous other past studies. What it does do however is confirm that long-term weightlessness is not good for a person’s heart. Many studies have shown that these issues mostly go away once astronauts return to Earth, but for any journey to Mars, involving two years in weightlessness, this data suggests the health risks will be far higher.

9 comments

Blue Origin completes first static fire test of New Glenn upper stage

9:23 am

Blue Origin yesterday successfully conducted a 15 second static fire test of the upper stage of its orbital New Glenn rocket.

The hotfire lasted 15 seconds and marked the first time we operated the vehicle as an integrated system. The purpose of the hotfire test was to validate interactions between the subsystems on the second stage, its two BE-3U engines, and the ground control systems.

Additionally, we demonstrated its three key systems, including: the tank pressurization control system, which uses helium to pressurize the liquid hydrogen and liquid oxygen tanks during flight; the thrust vector control system, which gimbals the engines and steers the rocket during flight; and validated the start-up and shut-down sequences for the BE-3U systems, which can be restarted up to three times during a mission.

In addition to testing our flight hardware, this hotfire test was also an opportunity for the launch operations team to practice launch day procedures on console and verify timing for a number of critical operations.

An actual launch date has not been announced. Previously New Glenn was to carry two Mars orbiters for NASA and launch by October 21, 2024 at the latest. Because of doubts the company could meet that data, NASA pulled the satellites from the rocket.

Prior to launch the company still has to do a full static fire test of the rocket’s first stage. Though company officials have said this would happen “very soon,” no date has been announced for the test.

0 comments

China launches eight satellites from offshore barge

9:16 am

China's spaceports

China today successfully launched eight satellites, its Smart Dragon-3 rocket lifting off from an offshore barge off the northeast coast of China.

The reports from China’s state-run press provided no information on the satellites themselves. The rocket has four stages that are all solid-fueled. This was its fourth launch from the off-shore barge. It was also thirteenth total offshore launch for China, involving four different rockets.

The leaders in the 2024 launch race:

93 SpaceX
42 China
11 Russia
11 Rocket Lab

American private enterprise still leads the rest of the world combined in successful launches 109 to 64, while SpaceX by itself now leads the entire world, including American companies, 93 to 80.

0 comments

September 23, 2024 Quick space links

4:23 pm

Courtesy of BtB’s stringer Jay. This post is also an open thread. I welcome my readers to post any comments or additional links relating to any space issues, even if unrelated to the links below.

  • ULA is prepping Vulcan for its second launch

    • Target launch date is October 4, 2024. The launch will put a dummy payload into orbit, but it will, if successful, also certify Vulcan for operationals paying launches for the U.S. military.

 

 

1 comment
1 … 173 174 175 176 177 … 1,354