Year: 2024

Changing Martian slope streaks

12:27 pm

Changing slope streaks on Mars
Click here, here, and here for original images.

Overview map

Time for some cool images from Mars taken over a dozen years! The three pictures above were taken, from left to right, in 2012, 2020, and 2024 and show the same exact Martian terrain. The first two pictures were photographed by the lower resolution context camera on Mars Reconnaissance Orbiter (MRO). The rightmost picture was taken on May 20, 2024 by MRO’s high resolution camera.

The white dot on the overview map to the right marks the location, in the middle of the vast lava flood plains found between Mars’ giant volcanos and north of the Medusae Fossae Formation, the largest volcanic ash deposit on Mars. The 1,200-foot-high mesa pictured above, its peak indicated by the red dot, is part of a group of such mesas that either represent the peaks of a mountain range now mostly buried by lava, or volcanic vents pushed up when those eruptions were occurring more than a billion years ago.

The focus of these pictures however is not volcanism, but the numerous slope streaks seen on the mesa slopes. Note how the 2012 earliest streaks are still visible in 2024, but have faded. Note also how there appears to have been no new streaks since 2020.

Slope streaks are a geological feature unique to Mars that at the moment remain unexplained. At first glance they appear to be a landslide of some kind, but years of orbital study has shown they do not change the topography at all, they never have debris piles at their base, and the streaks even sometimes actually flow up and over small rises in the slopes. They occur randomly throughout the year, and as seen above, over time fade.

Recent research has suggested their formation is related to dust avalanches triggered by dust storms, conclusions that are strengthened by the fact that slope streaks are generally found on dusty slopes, which in this case makes sense as the location is in the dry Martian tropics. That these dust avalanches do not change the topography at all, merely staining it, while sometimes actually flowing up and over rises, illustrates how Mars’ one-third gravity and thin, cold atmosphere makes things happen that are impossible on Earth.

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Has the FAA grounded SpaceX?

9:59 am

The FAA statement yesterday seemed quite clear — that the agency was grounding all SpaceX launches until the investigation into the failed landing of a Falcon 9 first stage was completed. That clarity was further accepted by numerous news organizations today, all of which clearly described in their reporting the FAA’s action as a grounding of further SpaceX launches for an unspecified amount of time, from days to weeks. (See here, here, and here for just a few examples.)

Nonetheless, there are strong indications that the FAA’s grounding will be very short. For example, though no dates are presently firm, SpaceX continues to list at least two Starlink launches as well as the Polaris Dawn private manned mission as targeting launches over the next few days, with one Starlink launch still aiming for a 10:18 pm (Pacific) launch tonight from Vandenberg. That liftoff might be tentative, but that SpaceX is still pushing for that launch date suggests it is trying to pressure the FAA to back off.

And SpaceX has good reason to expect that pressure to work. The FAA has already admitted there were no public safety issues from the first stage failure. In the past it has allowed launches to proceed under that condition, even if the investigation was on-going. SpaceX is almost certainly making this point known to the FAA, if its managers don’t know it already. We will find out I think by the end of today.

Even if the FAA backs down, that it even attempted any grounding in this situation was an egregious abuse of its regulatory power. There was no rational reason for it to even hint at doing so, even based on its own regulations as well as its statutory authority. If the goal was to do its job and not to harass SpaceX and Elon Musk, it would have immediately announced that no grounding was required because no issues of public safety were involved in the failure. Instead, it pushed its power, forcing SpaceX to push back.

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Lockheed Martin testing its own inflatable module design

9:40 am

Lockheed Martin recently successfully completed a test of its own inflatable module design, conceived in this case not as a full-scale module but as an airlock for ingress and egress from a space station.

In the Aug. 14 test, the inflatable airlock design was put through multiple, gas-in/gas-out cycles — essentially inflations and deflations with enough nitrogen gas to pressurize the airlock to the point it becomes as rigid as steel — to assess the extent to which its Vectran material strains over time, a process called creep. Knowing how creep affects a Vectran structure will allow Lockheed Martin to properly assess its operational life potential. Test engineers here have also put subscale softgoods habitat designs to the test, purposely bursting them to spotlight their robust nature and determine their pressure thresholds.

With the addition of Lockheed Martin, there are now at least four companies building inflatable modules for sale to space station companies. Sierra Space has the most developed module design, but a company in India recently announced it will build and sell its own. In addition, an American startup dubbed Max Space is building its own test module and hopes to launch next year.

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NASA leans toward launching Europa Clipper as scheduled, despite transistor issue

9:26 am

Though the final decision will be made in early September, NASA revealed today in a short post that management is leaning towards launching the multi-billion Europa Clipper mission as scheduled on October 10, 2024, despite a very recently discovered transistor issue where the transistors were not properly hardened in construction for the harsh radiation environment surrounding Jupiter.

The next major milestone for Clipper is Key Decision Point E on Monday, Sept. 9, in which the agency will decide whether the project is ready to proceed to launch and mission operations. NASA will provide more information at a mission overview and media briefing targeted for that same week.

The Europa Clipper mission team recently conducted extensive testing and analysis of transistors that help control the flow of electricity on the spacecraft. Analysis of the results suggests the transistors can support the baseline mission. [emphasis mine]

The highlighted sentence suggests NASA officials have weighed the option between launching on time with a limited ability to do science once at Jupiter versus delaying the launch years to fix the transistors, and are now favoring the former option. The cost of delay would be high and long, and NASA officials might believe the bad press for that option would be much greater than a mission that only achieves its bare minimum results. For example, to admit publicly that NASA installed transistors that were not space-hardened when that necessity has been known about since the 1960s would be as embarrassing to the agency as it was for Boeing when it discovered it had installed flammable tape in its Starliner capsule. NASA management might be leaning to letting a flawed multi-billion dollar project launch, knowing its capabilities are quite limited, in order to avoid that embarrassment.

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Chinese pseudo-company launches six satellites from off-shore barge

9:12 am

The Chinese pseudo-company Galactic Energy today completed a launch of six satellites, its Ceres-1 rocket lifting off from a barge off the coast of northeast China.

China’s state-run press once again illustrated how fake these pseudo companies are, in that it made no mention of the company in its official report, stating simply that the launch was completed by “China.” The companies might raise investment capital funds and sign contracts and make profits, but in the end they only do what they are told to do by the Chinese communists, and at any point those communists can confiscate the company for the government’s own purposes.

The leaders in the 2024 launch race:

84 SpaceX
36 China
10 Rocket Lab
9 Russia

American private enterprise still leads the rest of the world combined in successful launches 99 to 54, while SpaceX by itself leads the entire world, including American companies 84 to 69.

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August 28, 2024 Quick space links

3:39 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.

  • Blue Origin touts the assembly of New Glenn’s first flight first stage

    • The tweet does not say when this was accomplished, but considering the scheduled launch date is only a little more than six weeks away, it seems they are cutting things close indeed. It is clear they are getting close to that first launch, but it is also unclear they can meet the launch window required for their payload, two Mars orbiters.

 

 

 

 

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FAA grounds SpaceX because of first stage landing failure early today

1:36 pm


“Great business you got there! Really be
a shame if something happened to it!”

They’re coming for you next: Once again the FAA has expanded its harassment of SpaceX by now grounding the company from any further launches while it “investigates” the failed landing of a Falcon 9 first stage last night. The FAA statement is as follows:

“The FAA is aware an anomaly occurred during the SpaceX Starlink Group 8-6 mission that launched from Cape Canaveral Space Force Station in Florida on August 28,” the FAA said Wednesday in a statement. “The incident involved the failure of the Falcon 9 booster rocket while landing on a droneship at sea. No public injuries or public property damage have been reported. The FAA is requiring an investigation.”

The FAA’s actions against SpaceX since Biden became president have consistently been unprecedented and biased against the company. » Read more

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Today’s blacklisted American: Woman arrested in Arizona for publicly criticizing a public employee

12:55 pm

They’re coming for you next: While making a public comment criticizing the town’s attorney at the local city council meeting for Surprise in Arizona, Rebekah Massie was ordered to either shut up or be arrested by the town’s mayor, Skip Hall, because the council does not allow citizens to make such criticisms during the public comment period.

When she had the audacity to note quite correctly that she was entirely within her first amendment rights to say whatever she wanted, Hall then had her arrested.

I have embedded the video of this event below. It is egregious beyond words.


» Read more

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Evidence of Martian near-surface ice in an unusual location

11:48 am

Evidence of Martian near-surface ice in an unusual location
Click for original image.

Cool image time! The picture to the right, cropped, reduced, and sharpened to post here, was taken on May 27, 2024 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). Labeled merely as a terrain sample, it was likely taken not as part of any specific research request, but to fill a gap in the camera’s picture-taking schedule so as to maintain its proper temperature.

The picture however shows features that help confirm earlier research into the near-surface ice believed to permeate Mars’ middle latitudes. The knobby flat terrain both inside and outside of the crater resembles what scientists have labeled “brain terrain”, an as-yet unexplained geological feature unique to Mars and usually associated with near-surface ice and the glacial features found above 30 degrees latitude.

This 1.4-mile-wide unnamed crater is located at 40 degrees north latitude, so expecting near-surface ice or glacial features here is not unreasonable. The location however is different for other reasons, that make this data more intriguing.
» Read more

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Musk: Starlink will be made available to all cell phones in emergencies

9:34 am

Elon Musk has announced that SpaceX will make its Starlink internet constellation available to anyone with a cell phone should they need it during an emergency in remote areas.

The SpaceX CEO made the comments in an X post as the company, in partnership with T-Mobile, currently seeks approval from the Federal Communications Commission to operate its direct-to-cellular Starlink technology commercially. SpaceX says the satellite-based service would provide supplemental cell coverage to Americans from space that would close mobile “dead zones.” Cellular service providers AT&T and Verizon have raised concerns about the technology, including that it would disrupt their own mobile networks.

In a letter to the FCC on Friday, SpaceX said the service would connect first responders in a variety of environments and would be able to send wireless emergency alerts to everyone — not just T-Mobile customers — in places where there is no earth-based cellular coverage.

While this offer is morally correct, it is also good politics, as it acts as icing on the cake to encourage the FCC to approve that T-Moble license request. At the moment the technical details for making the proposal happen remain murky, but SpaceX’s willingness to offer this emergency service at no charge, something its competitors have apparently not, cannot hurt it in its negotiations with the FCC.

7 comments

Boom completes second flight test of one-third-scale prototype supersonic jet

9:28 am

The airplane startup Boom Supersonic on August 26, 2024 successfully completed the second test flight of its one-third-scale prototype XB-1 supersonic jet, taking off from the Mojave Air & Space Port in California.

The flight was manned by the company’s chief test pilot Tristan Brandenburg, and had as its primary engineering goal to test the retraction and deployment of the jet’s landing gear. During the fifteen minute flight the plane climbed to 10,400 feet and a maximum speed of 277 miles per hour.

The test checklist included retracting and extending the undercarriage for the first time, checking the plane’s handling, and the activation of a new digital stability augmentation system for roll damping to help maintain control in stall conditions. In addition, the right wing of the XB-1 was fitted with tufting to monitor the direction and strength of airflow over the wing.

The company plans a 10-flight test program with this prototype, eventually leading to flights exceeding the speed of sound. Boom also claims that its design will reduce the sound of the sonic boom, thus allowing its commercial supersonic jet to fly over land and increasing its commercial value. At the moment it has orders to sell as many as 96 of its full-scale plane to various airlines, including United and Japan.

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