Tag: Portal

Arianespace: Cause of Vega launch failure “human error”

10:18 pm

According to Arianespace officials, today’s failure of their Vega rocket likely occurred because of “human error” in the installation of cables.

Engineers concluded that cables leading to thrust vector control actuators on the upper stage were inverted, apparently a mistake from the assembly of the upper stage engine, according to Roland Lagier, Arianespace’s chief technical officer. The thrust vector control system pivots the upper stage engine nozzle to direct thrust, allowing the rocket to control its orientation and steering.

The cabling problem caused the engine to move its nozzle in the wrong direction in response to commands from the rocket’s guidance system. That resulted in the rocket losing control and tumbling just after ignition of the upper stage engine around eight minutes after launch.

Lagier characterized the inverted cables as a “human error,” and not a design problem.

The next obvious question is the source of the error. The answer was not revealed, I think partly because of the number of contractors involved in building that upper stage:

The AVUM upper stage’s structure is produced by Airbus, and the Ukrainian rocket contractors Yuzhnoye and Yuzhmash supply the AVUM stage’s main engine, which consumes hydrazine and nitrogen tetroxide propellants. Avio, the Vega rocket’s Italian prime contractor, oversees final integration of the AVUM upper stage.

The goal of the investigation that will now follow will be to point that source among these contracts, and how their interaction might have contributed to it.

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Virgin Galactic cancels its announced November suborbital flight

9:38 am

Capitalism in space: Virgin Galactic announced yesterday that it has canceled its announced November suborbital flight, claiming the cause were new COVID-19 guidelines imposed by the New Mexico Department of Health.

The flight had been scheduled for the November 19-23 time period. It had been announced with the typical hype that comes from Richard Branson.

Personally, I don’t believe Branson or Virgin Galactic as to the cause of this flight cancellation. I think they either never intended to fly, or have known for some time that new technical problems would prevent its launch as scheduled. I think they hyped the launch despite this, which conveniently pumped up the stock price at a time Branson was selling stock. They now announce the cancellation, the stock drops, but Branson has already pocketed his profits.

The timing of this announcement is also most ironic, as it occurred on the same day SpaceX docked four astronauts on ISS. Branson’s company began building its suborbital spacecraft in 2004, promising that it would soon fly hundreds, even thousands of private passengers into space. Sixteen years later it has never flown one passenger, and very few manned test flights. In the interim SpaceX built its Falcon 9 rocket and Dragon capsule, and is now launching passengers to orbit, with its first entirely private launch scheduled less than a year from now.

The comparison is quite stark. Why anyone would invest real money in this fake company at this point baffles me.

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Israeli fighter pilot to fly on Axiom’s first private Dragon launch in ’21

9:24 am

Capitalism in space: Axiom has revealed that an Israeli fighter pilot, Eytan Stibbe, will be the second passenger on on its first private Dragon launch to ISS in the fall of 2021.

Stibbe will be the second Israeli to fly in space, following Ilan Ramon, who died when the space shuttle Columbia broke up in 2003 during its return to Earth.

The Axiom AX-1 mission is scheduled to launch in the second half of 2021, which the company unveiled in a deal with SpaceX earlier this year. Astronaut Michael Lopez-Alegria, who previously worked for NASA and flew to space four times, will be the AX-1 mission commander, with Stibbe set to serve as a mission specialist.

AX-1 would be the first fully private mission to the International Space Station, with Lopez-Alegria and Stibbe flying with two other yet-to-be-named people.

The consistent rumors are that actor Tom Cruise and a movie director will be those other two passengers, but this is not confirmed.

It is important to emphasize that this space mission will be entirely private, with almost no involvement of the U.S. government other than providing coordination, the training of the astronauts, and the use of ISS. The rocket and spacecraft are SpaceX’s, purchased by the customer Axiom. Moreover, Axiom has plans to add its own private modules to ISS where future private space passengers will be housed, which will then reduce the government’s role and contribution even more.

And since this will be a private mission, it means the funds to fly it will come from its passengers, not the government. This also means that as long as there are customers, there will be no slow-down in future flights.

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SpaceX successfully launches four astronauts to ISS

5:41 pm

Falcon 9 launch on November 15, 2020 with four astronauts

Capitalism in space: SpaceX tonight successfully launched four astronauts to ISS on its Dragon capsule Resilience, using its Falcon 9 rocket.

They also recovered the first stage, landing it on its drone ship in the Atlantic. The routine manner in which SpaceX ran this launch is truly admirable. They make landing and reuse of the first stage so expected it is hard to believe that for fifty years rocket managers and engineers insisted it wasn’t doable.

They had one issue today, a failure of the capsule hatch to hold air pressure after closure. They calmly reopened the hatch, cleared the issue, added some lubricant, and closed the hatch, all in less than ten minutes.

Resilience will dock with ISS tomorrow evening.

The leaders in the 2020 launch race:

30 China
20 SpaceX
5 ULA
4 Europe (Arianespace)
4 Rocket Lab

The U.S. now leads China 32 to 30 in the national rankings.

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Watch today’s launch of SpaceX’s Resilience manned capsule

10:06 am

According to a NASA report yesterday, the weather then stood at 50% for allowing a launch of four astronauts to ISS on SpaceX’s Resilience capsule tonight at 7:27 pm (Eastern).

That percentage was still reported this morning. Part of the issue is that SpaceX wants to recover the first stage, and the weather therefore not only has to be good in Florida, it has to be good in the Atlantic where the stage will come down.

NASA’s live coverage begins at 3:15 pm (Eastern). The link to that live stream is below the fold. As I write this at around noon (Eastern) it is simply NASA TV’s normal feed, which is essentially full time propaganda for NASA. After 3:15 pm it will switch to live coverage, which unfortunately will still be packed with pro-NASA propaganda, even though this launch is entirely being run by the private company SpaceX. NASA’s only part is that of a customer, with the ability to say “no” at any point. The rocket, the capsule, the launchpad, and the countdown, is operated completely by SpaceX and its employees.

I have also added the clean feed from NASA, which appears to carry little commentary or narration.

» Read more

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ULA successfully launches reconnaissance satellite with Atlas 5

3:42 pm

Capitalism in space: ULA today successfully launched a military reconnaissance satellite using its Atlas 5 rocket.

This launch was the first Atlas 5 using these particular Northrop Grumman solid rocket boosters.

Because this was a military launch, the live broadcast ended at the moment the fairings were released, exposing the satellite. Final announcement of the satellite’s successful deployment will come later, assuming all goes well.

The leaders in the 2020 launch race:

30 China
19 SpaceX
5 ULA
4 Russia
4 Europe (Arianespace)
4 Rocket Lab

The U.S. now leads China 31 to 30 in the national rankings, with two more launches scheduled for the next two day. SpaceX is first with its second manned Dragon mission tomorrow, followed by Rocket Lab’s next launch from New Zealand on November 15.

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A majestic terraced butte on Mars

1:35 pm

Majestic butte on Mars
Click for full image.

Cool image time! The photo to the right, rotated, cropped, and reduced to post here, was taken on September 8, 2020 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It shows an outstanding terraced butte that would rival any of the similar buttes scattered throughout the Grand Canyon, and is reminiscent especially of Wotans Throne.

What makes this butte intriguing are its terraces, the obvious result of the repeated deposition of new layers across the surface over time, and now exposed by erosion. What caused them?

As always, location provides the clues. First, this butte is found at about 15 degrees north latitude in the vast Arabia Terra transition region between the Martian northern lowland plains and the southern cratered highlands. At that latitude, we are not looking at any recent glacial features. While there might have been ice here once, it hasn’t likely been present, either on the surface or underground, for a very long time.

This conclusion becomes important once we look at the wider photo below, taken by the high resolution camera on the European orbiter Mars Express. This image gives us the immediate context.
» Read more

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Ukraine signs Artemis Accords

8:25 am

Ukraine has becomed the ninth nation to sign the Artemis Accords, designed to encourage private enterprise in space.

The article at the link provides little information, other than claiming that ” Ukraine has all the scientific and technical capabilities and experience that allow it to become one of NASA’s important partners in the implementation of the Artemis program.”

Russia and the Ukraine are on opposite sides of a war, with Russia attempting to steal territory, with some success. Russia has also boycotted all Ukrainian space technology, ending a half century of business dealings.

It seems that the Ukrainian government looked at this political landscape, and decided to align itself with the United States. By signing the accords, it now has the opportunity to sell its space technology to NASA, as well as participate in any American effort to get to the Moon and elsewhere. That it chose to pick an ally halfway around the world instead of its big and powerful neighbor, tells us a great deal about the Ukrainian’s opinion of Russia.

I expect there will be a NASA press release in the next day or so that will provide us additional information.

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China today launched a new communications satellite

12:47 pm

The new colonial movement: Using its Long March 3B rocket, China today launched another communications satellite for the Asian market.

No word on whether the rocket’s first stages landed near residential areas, as has happened in the past. Also no word on whether it used grid fins to control its crash somewhat, as China also did previously.

The leaders in the 2020 launch race:

30 China
19 SpaceX
12 Russia
4 ULA
4 Europe (Arianespace)
4 Rocket Lab

The U.S. and China are now tied at 30 in the national rankings. This tie won’t last long, as the U.S. has three launches scheduled for the next three days, a ULA Atlas 5 launch of a military reconnaissance satellite tomorrow, SpaceX’s second manned Dragon launch on November 14, and Rocket Lab’s next commercial launch on November 15.

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Hubble sees too much infrared energy from gamma ray burst

9:09 am

The uncertainty of science: During a short gamma ray burst (GRB) that was observed in a distant galaxy on May, astronomers were baffled when measurements from the Hubble Space Telescope detected ten times more near infrared energy that they predict from this type of GRB.

GRBs fall into two classes. First there are the long bursts, which are thought to form from the collapse of a massive star into a black hole, resulting in a powerful supernova and GRB. Second there are the short bursts, which scientists think occur when two neutron stars merge.

The problem with this GRB is that though it was short and somewhat similar to other short GRBs across most wavelengths, in the near infrared Hubble detected far too much energy.

“These observations do not fit traditional explanations for short gamma-ray bursts,” said study leader Wen-fai Fong of Northwestern University in Evanston, Illinois.

…Fong and her team have discussed several possibilities to explain the unusual brightness that Hubble saw. While most short gamma-ray bursts probably result in a black hole, the two neutron stars that merged in this case may have combined to form a magnetar, a supermassive neutron star with a very powerful magnetic field. “You basically have these magnetic field lines that are anchored to the star that are whipping around at about a thousand times a second, and this produces a magnetized wind,” explained Laskar. “These spinning field lines extract the rotational energy of the neutron star formed in the merger, and deposit that energy into the ejecta from the blast, causing the material to glow even brighter.”

What is intriguing about their theory is that this merger of two neutron stars simply resulted in a larger neutron star, not a black hole. This new neutron star was also a magnetar and pulsar, but unlike a black hole, it was a still-visible physical object. And yet its creation in this GRB produced more energy.

When GRBs were first discovered, I was always puzzled why so many astronomers seemed to insist there must be a single explanation for them. With time, when two classes of GRBs were discovered, this assumption was then replaced with the equally puzzling insistence that only two types of events explained them.

It seemed to me that that such explosions had too many potential variables, and could easily have a wide range of causes, though all related to the destruction or merger of massive stars. As the data continues to accumulate this now appears increasingly the case.

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A field of Martian knobs

12:30 pm

Knob field on Mars
Click for full image.

Cool image time! The photo to the right, cropped and reduced to post here, was taken on August 9, 2020 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). Uncaptioned, the image is merely dubbed a “knob field.”

I won’t spend much time trying to explain this geology. It might be related to pedestal craters, but these ridges and mesas don’t really look like those features, since they don’t really stand above the surrounding terrain.

Maybe they are a very ancient field of craters long buried, now partly exposed due to erosion, but also partly buried by wind-blown Martian sand and dust. Once again, that many of their shapes don’t resemble craters discounts this explanation.

The location of this photo is in the southern cratered highlands, as shown by the black cross in the overview map below.
» Read more

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NASA officially approves operational Dragon manned missions

7:03 am

Capitalism in space: NASA yesterday officially certified SpaceX’s Dragon capsule for future operational manned missions to ISS.

NASA officials gave approval Tuesday for SpaceX to begin regular crew rotation flights to the International Space Station with the launch of four astronauts set for Saturday from the Kennedy Space Center in Florida, signaling a transition from development to operations for the human-rated Dragon spacecraft.

Mission managers completed a two-day Flight Readiness Review Tuesday and issued a preliminary go-ahead for the launch of SpaceX’s Crew Dragon “Resilience” spacecraft Saturday at 7:49 p.m. EST (0049 GMT Sunday) with NASA commander Mike Hopkins, pilot Victor Glover, and mission specialists Shannon Walker and Soichi Noguchi, a veteran Japanese space flier.

The decision means that SpaceX will now be rotating crews for NASA at ISS every six months. It will also be reusing both the first stages and the capsules. Endeavour, the capsule used on the demo flight earlier this year, will be reused in the spring. Resilience, the capsule scheduled for launch on November 14th, will be reused next fall.

Since SpaceX also has a commercial manned flight planned for next fall, that will probably require a third capsule. With those three capsules they will have at least for the next few years a fleet will cover all their initial needs. Don’t be surprised if however the introduce an upgraded capsule or two along the way, based on what they learn on these initial flights.

The article had one other piece of new news concerning Boeing’s Starliner capsule. The second unmanned demo flight has now officially been delayed into the first quarter of next year, rather than late this year.

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Rover update: Curiosity on the move again

1:51 pm

After spending more than three months at a single site, drilling three different holes in the same rock, Curiosity is finally on the move again, heading east and uphill toward Mt. Sharp. Yutu-2 meanwhile continues its very slow journey on the far side of the Moon. And the new rovers are halfway to Mars.

Drill holes at Mary Anning site in Gale Crater
Click for full image.

Curiosity

The image to the right, cropped and annotated to post here, shows the three drill holes that scientists had Curiosity drill in this one pavement rock, dubbed Mary Anning and located in the clay unit within Gale Crater on Mars. As I noted in my last update on July 22, 2020, the rover’s science team had made a specific detour in their planned route up Mt. Sharp in order to find this one last place to drill in this geological unit.

Though they have been very quiet about their results, apparently what they found in this one pavement rock was important enough that it required three drill holes. In addition, samples from the second hole were subjected to two of Curiosity’s limited supply of wet chemistry experiments. From the science team’s August 28, 2020 update:
» Read more

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Gateway already behind schedule and mismanaged

11:47 am

Surprise, Surprise! According to a report by NASA’s inspector general released today [pdf], the agency’s Lunar Gateway space station project is already behind schedule, will likely not be available for any 2024 Artemis lunar mission, and apparently has been mismanaged in a manner that is raising costs.

Many of the problems appear to have been caused by NASA’s abrupt decision, ten months after awarding its contracts to Maxar and Northrop Grumman to build respectively the station’s service (PPE) and habitation (HALO) modules, to require that they both be launched on a single rocket, rather than separate launches as originally planned. From the report:

The decision to launch the PPE and HALO together, while avoiding the cost of a second commercial launch vehicle, has contributed to cost increases due to the redesign of several components, an elevated launch risk, and a longer duration flight to lunar orbit. In addition, due to the decision Maxar was forced to terminate its subcontract with Space Exploration Technologies Corp (SpaceX) for PPE launch services, even though Maxar had already paid SpaceX approximately $27.5 million for this service, a portion of which was paid by NASA prior to the termination. Further, a co-manifested launch increases risk because together the elements may be too heavy for commercially available rockets or too long for the rocket’s fairing, potentially impacting intended spacecraft mass, length, and other requirements.

While the Trump administration had already made the decision to not rely on Gateway for its hoped-for 2024 manned lunar landing, it still hoped to have it available for use. This now appears unlikely. The report today is very clear: “Gateway likely will not be in a position to support a 2024 lunar landing.”

None of this is really a surprise. If anything, it is a feature of Gateway, not a bug. The program was always intended as a big jobs program, funneling money to NASA contractors who would in turn set up operations in various important congressional districts. Like SLS and Orion, it is more important that the program get delayed while costing more than actually accomplish anything.

Even if a Biden administration (still not confirmed) takes over and decides to support this project (which I think will happen), do not expect it to take place as scheduled. At best, Gateway will not be operational for years yet, and in fact it could take until the ’30s to get it built and launched. And that slow and expensive schedule will be exactly what our corrupt politicians and government bureaucrats want.

Meanwhile, China will be setting up its bases on the Moon. And maybe so will SpaceX using Starship.

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Giant iceberg heading to possible collision with South Georgia Island

10:45 am

Track of iceberg in the past three years

Close-up comparing iceberg with South Georgia Island.

The largest section of a huge iceberg that broke off from Antarctica’s Larson ice shelf in 2017 is now headed directly for a collision with remote South Georgia Island.

The first image to the right shows the iceberg’s movement since 2017. The second zooms in to show that the iceberg and island are almost the exact same size, 100 miles long.

South Georgia Island, 1,000 miles east of South America, has no permanent human inhabitants, though explorers, scientists, and mountain climbers do go there periodically. Instead, it is a wildlife preserve:

Around five million seals call the islands home, as well as 65 million birds of 30 different species. Migrating whales and various fish species populate the surrounding waters and there is a large penguin population.

The first link above, from the European Space Agency (ESA), typically shivers with the modern mindless fear that seems to permeate everything our culture considers:

About the same size as the South Atlantic island, it could ground in the shallow waters offshore and cause real problems for the island wildlife and seafloor-dwelling life. Penguins and seals need access to the sea to feed so the iceberg could easily block their foraging routes and life on the seafloor could be crushed if the berg grounds. The fear is that if the berg does anchor against the South Georgia coast, it could remain there for up to 10 years. When the A38 grounded here in 2004, many dead penguin chicks and seal pups were found along the shoreline.

All maybe true, but then, the arrival of icebergs this large to South Georgia Island while likely rare is also quite normal. The sea life there has had to adapt to these events, or else it would not have survived to today.

Also, note the blue lines. Those are the tracks of past icebergs as recorded from orbit. Not only is it common for icebergs to be aimed at South Georgia Island, the currents appear to guide them around the island once they get close. While this new berg is so huge it might plow into the island anyway, the data here suggests it will not.

Regardless, this somewhat rare event provides scientists a opportunity to learn something about the survival of species in hostile environments. We can’t prevent such things, but we can learn their consequences as well as how life adapts under such conditions.

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Apophis: the asteroid that may someday hit the Earth

8:40 am

Apophis' path past the Earth in 2029
From the conference’s logo.

Last week planetary scientists held a three-day virtual conference focused on the asteroid Apophis, whose orbit regularly places it close to the Earth with a real possibility that it might someday hit the Earth.

When Apophis was originally discovered early in 2004, it wasn’t at first seen as an out-of-the-ordinary asteroid. Not much was known about it other than its albedo and that it was not trivial in size, probably around 1,000 feet in diameter. All this changed in December 2004, when further observations suggested that it had a 2.7% chance of impacting the Earth in 2029, making it the most dangerous asteroid ever discovered.

Fortunately, all subsequent observations of the asteroid have since eliminated any possibility of an impact, at least through the year 2068. Depending on what happens during the 2029 and 2036 fly-bys of Earth, there is a very small chance that it could hit the Earth in 2068, though the data says the chances of that happening are quite small (1 in 150,000).

On April 13, 2029 however Apophis will still zip past the Earth less than 20,000 miles above its surface, well within the orbit of all geosynchronous satellites. For viewers in Europe and Africa it will be a naked eye object, with a magnitude of -3.

Because the date of that close fly-by is so well known, and because this asteroid still poses a threat to the Earth, the planetary science community is very much interested in taking advantage of that close approach. From the conference’s webpage:

Knowledge is the first line of planetary defense, and the 2029 Apophis encounter is a once-per-thousand-year opportunity for investigating an asteroid as large as 350 meters passing within 6 Earth-radii. Time is of the essence as we have less than a decade to plan Earth-based and possible in-situ missions whose measurements can deliver unprecedented detailed knowledge on the physical nature of Apophis as the prototype example (poster child) of potentially hazardous asteroids.

I attended that conference, and am here now to give a summary.
» Read more

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Jupiter’s stormy southern polar regions

2:46 pm

Jupiter's polar regions
Click for full image.

Cool image time! The photo to the right shows the southern polar regions of Jupiter. The image, taken by Juno during its 29th close-fly of Jupiter, was enhanced by a citizen scientist who only goes by the nickname Flury-21. This in fact was this person’s first try at enhancing a Juno image. He or she did a nice job, but provided no additional information other than saying that he “used lightroom to enhance the image and mostly used the dehaze effect.”

Works nicely nonetheless to illustrate how the bands that dominate Jupiter’s equatorial and mid-latitude regions disappear at the pole. Instead, the pole is a region of chaotic independent hurricanes, many bigger than North America. Other images from Juno suggest that they change relatively quickly. For example, compare this image of the south pole with an earlier one taken during the 28th fly-by. While we might not be looking at the same hemisphere, it is hard to believe there is no overlap between both images. Yet I can find no corresponding features.

The two images of course were taken months apart, and thus it is not surprising the storms have changed completely. However, I also suspect, given their size, that even over this time span some storms have survived, but changed so much it is hard to link them together. The only way to do this would be to have an orbiter close enough all the time to make movies. Unfortunately, Juno cannot do this, and I don’t expect any orbiter like this to reach Jupiter for many decades.

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Canada’s government approves Starlink service

9:41 am

Capitalism in space: Canada’s government yesterday announced that it has given final approval to SpaceX’s Starlink internet service to offer those services in that country.

More here.

This final approval came from the Innovation, Science and Economic Development Canada (ISED) agency, which appears designed to protect Canadian businesses from foreign competition. It had appeared initially that they had been stalling giving their approval (maybe for political reasons). The delay however could simply have been the slowness of operation which is typical of such government bureaucracies. As noted at the first link above, however “Clearly, the government heard the demand from consumers to get this service approved.” And since there are no Canadian companies that can offer this service, it was absurd not to okay SpaceX’s operation.

This approval means that Starlink is now posed to begin commercial operations, actually selling its internet service to the public, and doing it ahead of its primary competitor, OneWeb. Considering that OneWeb had started development and satellite launching first, this achievement illustrates again SpaceX’s nimble and fast approach to business. The company does not waste time in anything it does. It might not meet all of its scheduling goals, but not for want of trying.

SpaceX has already been offering the service in its test market in the northern U.S. for the price of $99 per month plus an initial fee of $499 for equipment, with the initial user reports very positive.

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Chinese pseudo-company launches first satellite

9:21 am

The new colonial movement: The pseudo-private Chinese company Galactic Energy today successfully completed its first orbital launch, placing a small satellite into orbit using its Ceres-1 rocket.

Galactic Energy is the fourth Chinese private launch company overall to make an orbital launch attempt, all with light-lift solid launchers. Landspace made the first attempt in October 2018, with OneSpace following in March 2019. In July last year iSpace became the first to successfully achieve orbit with its Hyperbola-1 launch.

The 19-meter-long, 1.4-meter-diameter Ceres-1 can loft 350 kilograms to low Earth orbit or 230 kilograms to a 700-kilometer SOO. It consists of three solid stages and an advanced liquid upper stage. [emphasis mine]

That all of these companies are using solid rockets explains why I call them “pseudo private.” They might be raising independent venture capital money to fund their operations, and they might be aimed at earning a profit, but solid rocket technology is always the primary technology used for military missiles, and none of these Chinese companies could do anything without the close and very firm permission and supervision of the Chinese communist government. In fact, their very existence is likely because that Chinese communist government wants them to exist.

Nonetheless, this launch raises China’s launch capabilities. The leaders in the 2020 launch race:

29 China
19 SpaceX
12 Russia
4 ULA
4 Europe (Arianespace)
4 Rocket Lab

The U.S. is still ahead of China, 30 to 29, in the national rankings.

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India successfully completes first launch in 2020

9:10 am

For the first time in 2020 India has launched a rocket, successfully placing ten satellites into orbit using its PSLV rocket.

The primary payload was an Indian Earth resource satellite dubbed EOS-1.

When the year started ISRO, India’s space agency, had predicted it would complete twelve launches in 2020, which would have been a record for their nation. Then the panic over COVID-19 set in, and they canceled everything for months on end. This long stand down will likely cause delays in all their long term programs including their effort to launch their own astronauts on their own rocket in their own capsule.

The leaders in the 2020 launch race remain the same:

28 China
19 SpaceX
12 Russia
4 ULA
4 Europe (Arianespace)
4 Rocket Lab

The U.S. remains ahead of China 30 to 28 in the national rankings..

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November 5, 2020 Zimmerman Space Show podcast

10:09 pm

The podcast of my two-hour appearance on The Space Show yesterday is now available here.

As always it was a fun show, with David Livingston starting out by asking me to give my sense of the consequences of the election (no matter who wins) on the aerospace industry. Things went all over the place after that, from Mars exploration to China’s space program to Elon Musk.

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China launches ten satellites for Argentinian company

7:52 am

China today used its Long March 6 rocket to successfully launch ten satellites for the Argentinian company Satellogic S.A.

The satellites form the beginning of a 25-satellite constellation designed to do Earth resource observations. The Chinese rocket in turn is designed to capture the emerging smallsat market.

The leaders in the 2020 launch race:

28 China
19 SpaceX
12 Russia
4 ULA
4 Europe (Arianespace)
4 Rocket Lab

The U.S. remains ahead of China 30 to 28 in the national rankings.

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SpaceX launches Space Force GPS satellite

4:37 pm

Capitalism in space: SpaceX tonight successfully launched the GPS satellite that on a previous launch had experienced a launch abort at T-2.

This was a completely new Falcon 9 rocket, with two of its original engines replaced after the company had traced the issue that caused the launch abort. The first stage successfully landed on the drone ship in the Atlantic Ocean, and will fly again on the next GPS launch by SpaceX for the Space Force.

The satellite has been deployed successfully, completing the launch.

The leaders in the 2020 launch race:

27 China
19 SpaceX
12 Russia
4 ULA
4 Europe (Arianespace)
4 Rocket Lab

The U.S. now leads China 30 to 27 in the national rankings.

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Terraced mesa inside Martian depression

1:14 pm

Terraced mesa inside depression
Click for full image.

Cool image time! The photo to the right, cropped and reduced to post here, was taken on July 1, 2020 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It shows a very puzzling terraced mesa inside an enclosed depression or sinkhole (the western half of which can be seen in the full image).

What caused that mesa? A first scan of the image and the data suggests we are looking at sinkage related to the melting of an underground ice table. The latitude here is 34 degrees south, just far enough away from the equator for glacial activity to be possible. Moreover, the small circular depression in the upper right of the image strongly suggests an impact crater into slushy material. The implication is that this depression is the result of the melting or sublimation of underground ice, leaving behind a mesa that is made of solider stuff.

Another possibility is that the terraced mesa is actually the remains of glacial material. In the full image features inside other nearby depressions are terraced also, but are also much more reminiscent of glacial features found in many craters in the mid-latitudes. The depression is also close to the headwaters of Reull Valles, a meandering canyon where many images have shown glacial features (see for example here, here, and here).

These features however could also have nothing to do with water ice.
» Read more

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Why Martian mountains are different than on Earth

3:08 pm

A mountain peak on Mars
Click for full image.

Cool image time! The photo to the right, rotated, cropped, and reduced to post here, was taken on August 12, 2020 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It shows what to any Earthling’s eye appears to be a somewhat ordinary flat-topped mountain peak with two major flanking ridgelines descending downward to the north and the south, and two minor ridgelines descending to the northwest and southwest.

This peak and its landscape would surely be quite a spectacularly place to visit, should humans ever settle Mars and begin doing sightseeing hikes across its more interesting terrain. I can definitely imagine hiking trails coming up the two minor ridges, with a crest trail traversing the main north-south ridge across the peak.

This is not however a mountain on Earth. It is on Mars, which makes its formation and evolution over time fundamentally different than anything we find on Earth, despite its familiar look.

First, what formed it? Unlike most of Earth’s major mountain chains, the mountains of Mars were not formed by the collision of tectonic plates, squeezing the crust upward. Mars does not have plate tectonics. Most of its mountains formed either from the rise of volcanoes at single hot spots, or from the wearing away of the surrounding terrain to leave behind a peak or mesa.
» Read more

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Layered mesa on Mars

2:41 pm

Layered mesa 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 24, 2020 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It shows a distinctive mesa in a mountainous region in the cratered highlands of Mars, just north of Hellas Basin, the deepest basin on the red planet.

The mesa’s most distinctive feature are its terraced layers, a feature that MRO has found in numerous other places surrounding and inside Hellas Basin (see for example the cool images here, here, here, here, here, and here.)

On Earth the assumption would be that these terraced layers imply different sedimentary layers that erode at different rates, as best illustrated by the Grand Canyon in Arizona. On Mars that assumption is not unreasonable, but unlike Earth, those layers could not have been formed in connection with large ocean bodies creating seafloor layers from the deposit of sealife over centuries. Some other geological process over time formed them, with volcanism, either from volcanoes or impact, being the most likely.
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Sunspot update: An active October heralds the likely end of solar minimum

12:32 pm

With the start of a new month it is once again time to publish another sunspot update. NOAA yesterday updated its monthly graph for tracking the Sun’s monthly sunspot activity. As I have done now every month since this website started in 2011, it is posted below, with additional annotations by me to show the past solar cycle predictions.

Unlike September, which saw almost no sunspots, October was a very active month, with the amount of sunspots far exceeding prediction. Furthermore, every sunspot during the month had a polarity assigning it to the new solar cycle, not the last.

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A buried crater on Mars

3:35 pm

Close overview map

The overview map to the left indicates the general terrain surrounded today’s cool image. The white rectangle is the area covered by this image, taken on July 4, 2020 by the high resolution camera on Mars Reconnaissance Orbiter. If you look close you can see that this photograph covers the eastern rim of what looks like an ancient and mostly buried crater on Mars. This unnamed crater is about 17 miles across.
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Is this the planned landing site of China’s Mars rover?

7:21 am

The prime landing site for China's Mars rover?

According to this Space News article, a report in the Chinese press, since revised to remove the information, had provided precise coordinates on Mars for the prime candidate landing site for China’s Tianwen-1 rover.

[I]nformation published in an article (in Chinese) in the official China Space News publication following launch in July provides a specific primary landing site. The article reported landing coordinates of 110.318 degrees east longitude and 24.748 degrees north latitude, within the southern portion of Utopia Planitia. Online versions of the article have since been edited to remove the coordinates; however, these remain published by sources citing the article.

The mosaic on the right, made up of two images taken by Mars Reconnaissance Orbiter’s (MRO) context camera (found here and here) shows this location with the white cross. The white box is the area covered by the only image taken of this area by MRO’s high resolution camera.

As these photos show, this location, in a part of Mars’ northern lowland plains dubbed Utopia Planitia, is generally smooth and flat, making for a relatively safe landing site. At the same time, it has craters and some ridges and hills that could pose issues.

That the coordinates were removed from the Chinese press story suggests that this might be the prime site, but until Tianwen-1 gets into Mars orbit and begins scouting the site with its own high resolution images, they want to reserve judgement. The spacecraft arrives in orbit in February ’21, and they presently plan to land the rover in May. That gives them three months to scout this location as well as a secondary landing site on the other side of Mars, in the Chryse Planitia northern lowlands [pdf], the same region where Viking 1 and Mars Pathfinder landed.

Once they have done this they will be able to refine the location more precisely.

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