Tag: Portal

A chain of Martian sinkholes

3:19 pm

Chain of sinkholes on Mars
Click for full image.

Cool image time! The photo to the right, rotated, cropped, and reduced to post here, was taken on June 17, 2021 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It shows a somewhat straight depression with several wider and deeper pits along it.

The feature immediately suggests sinkholes that exist because the ground is sagging into voids below ground. Yet, both the straight and circular depressions also appear filled, showing no evidence that they connect to any below ground cavities.

Are the sinks the result of a fissure produced by a graben, when two large blocks shift relative to each other to cause a fissure to appear? Or are they evidence of an underground lava tube? Or maybe they are the filled remains of a now mostly buried canyon carved by water or ice?

As always, a wider view helps clarify things, though whether it answers the question is uncertain.
» Read more

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The number of new smallsat rocket startups continues to grow

9:31 am

Capitalism in space: According to a new annual report, the number of new smallsat rocket startups that have been proposed continues to grow, though the number presently in actual development or operation declined slightly in the past year.

That total has grown to 155 vehicles, he said, ranging from 10 vehicles in operation to several dozen that have gone defunct since the survey started in 2015, when about 30 vehicles were included. “I was really expecting to see a slowdown in the number of new launch vehicles that we were seeing coming out of the woodwork in the last few years,” he said during a conference session Aug. 11. “It turns out that slowdown has not happened at all.”

There have been some changes in the industry, though. He found the number of vehicles in active development declined slightly from last year, to 48, with a decrease as well in the number of vehicle concepts on a “watch” list that have not yet entered active development. More than 40 vehicles are now classified as defunct, about 10 more than last year. “This is not surprising given the challenges of getting one of these vehicles fielded,” he said.

The U.S. has the most smallsat startups in development, 22, but China has the most that the report defines as operational, six of ten. This last number should change considerably if the planned launches of six or so American smallsat rocket startups occur as promised in the next six months.

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China to fly asteroid sample mission in ’24

9:19 am

The new colonial movement: Chinese scientists have revealed that China is now building an asteroid sample mission to launch in ’24 and grab samples in ’25 from the near Earth asteroid dubbed Kamoʻoalewa.

According to a correspondence in Nature Astronomy, there are two typical approaches to sampling asteroids like Kamoʻoalewa, namely anchor-and-attach and touch-and-go.

The former requires delicate and dangerous interactions with the planetary body but allows more controllable sampling and more chances for surface analysis. The latter, used by Hayabusa 2 and OSIRIS-Rex, is a quick interaction facilitated by advanced navigation, guidance and control and fine control of thrusters.

China’s mission will use both architectures in order to “guarantee that at least one works.” The paper states that there is “still no successful precedent for the anchor-and-attach architecture,” meaning a possible deep space first. A 2019 presentation reveals that China’s spacecraft will attempt to land on the asteroid using four robotic arms, with a drill on the end of each for anchoring.

The attempt to do both these approaches is audacious, especially because the evidence from both OSIRIS-REx and Hayabusa-2 is that it will be difficult to safely land and hold onto a rubble pile asteroid. The material is too loosely held together.

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Confirmed: Perseverance sample was too crumbly and poured away

8:58 am

Perseverance scientists have confirmed that the reason their sample container was empty once stored on the rover was because the material that they had drilled into was more crumbly than expected, and when the core was extracted from the ground the powder simply poured out of the core tube.

The team has decided to move on.

Rather than try again with the cratered floor fractured rough, Perseverance has already departed the area and is heading towards a region named South Séítah, which likely contains layered sedimentary rocks that are more similar to the Earth rocks that engineers drilled during tests before the mission’s launch. “We are going to step back and do something we are more confident of,” says Trosper. The rover will try to drill a core there, perhaps in early September. When it does, engineers will pause the automated drilling process to check whether a core has been extracted before the rover takes the next steps of sealing the tube and storing it away.

While it makes sense to find a different place to drill for a core sample, it appears that Perseverance is designed in a manner that it can do no analysis of any drill hole material:

Curiosity and Perseverance are similar in many respects — Perseverance was actually built using much of the leftover hardware from Curiosity — but there is one major difference in how they drill into the Martian surface. Curiosity intentionally grinds rock into powder, which it then places inside analytical instruments it has onboard to conduct scientific studies. NASA designed Perseverance to extract intact cores that slide into its sampling tubes. So crumbly rocks are good for Curiosity, but not for Perseverance.

If Perseverance can do no analysis of any drillholes, this limits the science it can do significantly. While putting aside samples for later return to Earth is an excellent idea, to make this the priority so that Perseverance can analyze nothing seems a terrible decision. What if that sample return mission never gets built?

If my supposition here is correct it also means NASA’s repeated claim that Perseverance is searching for ancient life on Mars is even more of a lie than I had assumed. It isn’t merely that this claim is a distortion of Perseverance’s actual research goals — to study the geology of Mars — the rover can’t look for ancient life. It has no way of looking at any samples it digs up.

I am not sure if my conclusions here are entirely correct. For example, maybe they hope to find this alien evidence by looking at the sealed core samples they store. Unfortunately, I have no idea, because I am somewhat handicapped in describing Perseverance’s day-by-day operations because, unlike Curiosity, the Perseverance team is providing no regular updates of their operations at their blog. While the Curiosity team posts something at least twice a week, the Perseverance team has posted nothing since just after landing in February. I’ve emailed NASA about this, but have gotten no response.

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India’s GSLV rocket fails in first launch since 2019

6:09 pm

India’s attempt today to resume launches of its large GSLV rocket, stalled because of the Wuhan panic since its last launch in 2019, failed today when something went wrong with the third stage.

This entirely Indian-built rocket is the one they plan to use for their manned missions. This failure will certainly set that program back, already delayed significantly because of the shut down of their entire launch industry because of COVID-19.

The satellite, also Indian-built, is also a big loss. It was to be the first in a series of Earth observation satellites.

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OSIRIS-REx scientists refine Bennu’s future Earth impact possibilities

1:28 pm

Using the orbital and gravity data compiled during OSIRIS-REx’s visit to the asteroid Bennu, scientists have refined its future orbits as well as the most likely moments it might impact the Earth.

In 2135, asteroid Bennu will make a close approach with Earth. Although the near-Earth object will not pose a danger to our planet at that time, scientists must understand Bennu’s exact trajectory during that encounter in order to predict how Earth’s gravity will alter the asteroid’s path around the Sun – and affect the hazard of Earth impact.

Using NASA’s Deep Space Network and state-of-the-art computer models, scientists were able to significantly shrink uncertainties in Bennu’s orbit, determining its total impact probability through the year 2300 is about 1 in 1,750 (or 0.057%). The researchers were also able to identify Sept. 24, 2182, as the most significant single date in terms of a potential impact, with an impact probability of 1 in 2,700 (or about 0.037%).

Although the chances of it hitting Earth are very low, Bennu remains one of the two most hazardous known asteroids in our solar system, along with another asteroid called 1950 DA.

This paper’s conclusions are confirming what had been found earlier in the mission, while OSIRIS-REx was still flying in formation with the asteroid. Nonetheless, it is essential to refine these numbers as precisely as possible, so this confirmation is excellent news.

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Glacial ice sheets on Mars?

1:10 pm

Glacial ice sheets on Mars?
Click for full image.

Cool image time! The photo to the right, rotated, cropped, and reduced to post here, was taken on June 29, 2021 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). The location is in Mars’ glacier country, that strip of chaos terrain that runs about 2,000 miles along the transition zone between the northern lowland plains and the southern cratered highlands at 30 to 47 degrees north latitude. This particular feature is located in Deuteronilus Mensae, the westernmost region of that strip of chaos.

I call this glacier country because practically every image taken by MRO’s high resolution camera in this region suggests the presence of glacial material covered by a protective layer of debris. The photo to the right is typical, though a bit more puzzling because of the depressions that appear to run along highpoints.

As usual, the overview map below helps explain what we are looking at.
» Read more

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India begins countdown for 1st GSLV rocket launch since 2019

9:52 am

India today began the countdown for its first GSLV rocket launch in more than two years, since it launched the lunar orbiter Chandrayaan-2 with the lunar rover/lander that crashed onto the surface shortly thereafter.

The launch is targeted for 8:13 p.m (Eastern) tonight.

The long gap in GSLV launches was almost entirely because of India’s panic over the Wuhan flu. For the past year and a half its space agency ISRO has completed three just launches, all of which were delayed until late in 2020 because of the panic. Prior to that panic, India had hoped to launch as many as 8 to 12 times in ’20 and ’21 each. Instead, their space industry shut down, and the commercial business they hoped to capture went to American private companies instead.

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Intuitive Machines awards SpaceX another lunar lander launch contract

9:36 am

Intuitive Machines Nova-C lunar lander
Artist’s impression of Intuitive Machines lunar lander,
on the Moon

Capitalism in space: Intuitive Machines announced yesterday that it has awarded SpaceX’s Falcon 9 rocket the launch contract for its third unmanned lunar lander, making SpaceX its carrier for all three.

The key quote however from the article is this:

Intuitive Machines’ first two lander missions are carrying out task orders for NASA awarded under its Commercial Lunar Payload Services (CLPS) program. However, IM-3 is not linked to any CLPS missions. Marshall said that the mission “has an open manifest for commercial and civil customers.”

In other words, this third launch is being planned as an entirely private lunar robotic mission. Intuitive Machines is essentially announcing that it will launch the lander and has room for purchase for anyone who wants to send a payload to the Moon. This opportunity is perfect for the many universities that have programs teaching students how to build science payloads and satellites. For relatively little, a school can offer its students the chance to fly something to the lunar surface. Not only will it teach them how to build cutting edge engineering, it will allow those students to do cutting edge exploration.

This is the whole concept behind the recommendations I put forth in my 2016 policy paper, Capitalism in Space. If the government will simply buy what it needs from the private sector, and let that sector build and own what it builds, that sector will construct things so that their products can be sold to others, and thus expand the market.

Since around 2018 NASA and the federal government has apparently embraced those recommendations, and we are about to see that policy bear fruit in unmanned lunar exploration. Below is a list of all planned robotic lander missions to the Moon, all scheduled for the next four years:
» Read more

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Rocket Lab to launch three times in one month, beginning in late August

8:55 am

Capitalism in space: Rocket Lab yesterday announced that it is aiming to complete three launches of its Electron rocket in less than a month, with the first scheduled for late August.

Scheduled to lift-off from Launch Complex 1 on New Zealand’s Mahia Peninsula in late August, the ‘Love At First Insight’ mission will be Rocket Lab’s 22nd Electron launch overall and fifth mission of 2021. ‘Love At First Insight’ is the first in a rapid succession of scheduled Electron launches between late August through September that represent the company’s fastest launch turnarounds to date.

All three launches are for the company BlackSky, which is putting into orbit a constellation of Earth-imaging small satellites.

Since 2018 Rocket Lab has repeatedly promised that it will soon ramp up its launch rate to monthly, and then weekly. For a variety of reasons, mostly relating to two launch failures in the past year, that promise has not been kept. If the company succeeds in putting these six Black Sky satellites into orbit on three quick launches, it will finally come close to demonstrating that pace.

Rocket Lab will reinforce that promise if it also completes its manifest of 2021 launches, which calls for three more launches for a total of nine launches in ’21, six of which will have occurred in the year’s last four months.

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Antares rocket successfully launches Cygnus freighter to ISS

8:36 pm

Capitalism in space: Northrop Grumman’s Antares rocket today successfully launched a Cygnus cargo capsule to ISS.

This was the fourth launch this year for Northrop Grumman’s launch division, which was once the company Orbital ATK. It was also the most in a single year for that division since it launched five times in 2013.

26 China
20 SpaceX
12 Russia
4 Northrop Grumman

The U.S. now leads China 31 to 26 in the national rankings.

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Inspector general slams NASA spacesuit program

12:39 pm

NASA's failed spacesuit
NASA’s failed spacesuit

A NASA inspector general report released today [pdf] bluntly slammed NASA endless and much delayed project to develop a new spacesuit for its Artemis program.

After noting that the project has been ongoing at NASA for fourteen years, the summary then blasts the program hard:

NASA’s current schedule is to produce the first two flight-ready xEMUs [NASA acronym for spacesuits] by November 2024, but the Agency faces significant challenges in meeting this goal. This schedule includes approximately a 20-month delay in delivery for the planned design, verification, and testing suit, two qualification suits, an ISS Demo suit, and two lunar flight suits. These delays—attributable to funding shortfalls, COVID-19 impacts, and technical challenges—have left no schedule margin for delivery of the two flight-ready xEMUs. Given the integration requirements, the suits would not be ready for flight until April 2025 at the earliest. Moreover, by the time two flight-ready xEMUs are available, NASA will have spent over a billion dollars on the development and assembly of its next-generation spacesuits.

Given these anticipated delays in spacesuit development, a lunar landing in late 2024 as NASA currently plans is not feasible. [emphasis mine]

This bears repeating: NASA will spent more than a billion dollars and fourteen years to build two spacesuits. What a bargain! Imagine if we have to pay a tailor for fitting!

And yet, despite this incredibly inefficient use of money, the report also finds that NASA doesn’t have enough to get the suits made on time!

Besides the endless managerial incompetencies noted in the report, it also notes several technical issues contributing to the problems, including one case where “staff used the wrong specifications” causing a unit’s failure.

Overall, the entire management of this program by NASA and the government appears to have been confused, incoherent, wasteful, and unable to get the job done, a pattern quite typical of almost every government project for the past four decades. Yet, though the report notes that in October 2019 the agency had finally decided to dump this failed program entirely and instead hire private companies to build the suits, the report criticizes this change, noting that the commercial contractors will not be required to use NASA designs, meaning the $420 million NASA has spent will literally be wasted.

So what? That money has been wasted already. I am quite willing to bet that for no more than a quarter of that cost, two private companies could get new spacesuits ready, and do it quickly, as long as our entirely incompetent government gets out of their way.

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