Category: Behind The Black

First and second stages of first Ariane-6 rocket are now assembled and on the launchpad

8:48 am

Having integrated together the core first stage and the upper stage of the first Ariane-6 rocket, engineers have now lifted both vertical on the launch pad in preparation for its launch sometime in June or July.

Next two strap-on boosters will be attached to the core stage, as well as the payloads made up of eighteen different smallsats and experiments, including two test re-entry capsules testing their ability to bring payloads safely back to Earth.

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Astroscale wins contract to complete removal of large piece of space junk

8:39 am

Capitalism in space: Japan’s space agency JAXA has now awarded the orbital tug startup Astroscale a contract to complete the removal of an abandoned upper stage from a previously launched rocket.

Astroscale has already flown the first phase of this project, with its ADRAS-J tug flying in March and April a demo rendezvous mission with the rocket stage, getting to within several hundred meters of the stage. The second phase, now approved, will grab the stage with a robot arm and then de-orbit it. No date for the launch of that second phase was announced.

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Flat tadpole depression in ancient Martian crater

12:32 pm

Flat tadpole depression in ancient Martian crater
Click for original image.

Cool image time! The picture to the right, rotated, cropped, reducedl, and enhanced to post here, was taken on February 24, 2024 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). Dubbed a “terrain sample” by the camera team, it was likely taken not as part of any specific research project but to fill a gap in the camera’s schedule so as to maintain that camera’s proper temperature. When they have to do this, they try to pick interesting targets, though there is no guarantee the result will be very interesting.

In this case the camera team already knew this location would have intriguing geology, based on an earlier terrain sample taken a year ago only eight miles to the south. The landscape here is a flat plateaus surrounding flat depressions, some of which appear connected by drainage channels. Today’s picture shows one flat depression with a short tail-like channel flowing into it.

Note the pockmarked surface. The many holes could be impact craters, but they also could be holes caused when the near-surface ice at this location sublimated into gas and bubbled upward to escape. Now all we see is dry bedrock, the flat ground riddled with holes.
» Read more

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Movies of two supernovae remnants produced from two decades of Chandra X-ray images

9:51 am

Using more than two decades of data from the Chandra X-ray Observatory, scientists have created two movies of the supernovae remnants the Crab nebula and Cassiopeia A.

I have embedded those movies below. From the press release:

Over 22 years, Chandra has taken many observations of the Crab Nebula. With this long runtime, astronomers see clear changes in both the ring and the jets in the new movie. Previous Chandra movies showed images taken from much shorter time periods — a 5-month period between 2000 and 2001 and over 7 months between 2010 and 2011 for another. The longer timeframe highlights mesmerizing fluctuations, including whip-like variations in the X-ray jet that are only seen in this much longer movie. A new set of Chandra observations will be conducted later this year to follow changes in the jet since the last Chandra data was obtained in early 2022.

…Cassiopeia A (Cas A for short) is the remains of a supernova that is estimated to have exploded about 340 years ago in Earth’s sky. While other Chandra movies of Cas A have previously been released, including one with data extending from 2000 to 2013, this new movie is substantially longer featuring data from 2000 through to 2019.

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Several new missions to the asteroid Apophis proposed by commercial and governments

9:39 am

Apophis' path past the Earth in 2029
A cartoon showing Apophis’s path in 2029

At a conference this week several new missions to the asteroid Apophis during its close Earth fly-by in 2029 were proposed by both private companies and government entities.

  • Blue Origin is considering sending its Blue Ring orbital tug, launched in 2027 on a Falcon 9.
  • JPL proposes sending two cubesats on the orbital tug mission previously announced by the startup ExLabs.
  • NASA continues to study sending the two Janus spacecraft, since its original asteroid mission was lost when the Psyche asteroid mission was delayed.
  • The European Space Agency has two different missions under study.

With all of these missions, the big obstacle is funding. Most are either only partly funded, or not at all.

At the moment the only mission actually on its way to Apophis is OSIRIS-APEX, which having completed its sample return mission to Bennu was then sent to Apophis.

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More partners join China’s International Lunar Research Station

9:18 am

China today announced the addition of three more international partners in its project to build a permanent base on the Moon, dubbed the International Lunar Research Station (ILRS).

The new partners of the ILRS include Nicaragua, the Asia-Pacific Space Cooperation Organization and the Arab Union for Astronomy and Space Sciences. China will collaborate with these three parties on various issues concerning the ILRS, including its demonstration, engineering implementation, operation and application, according to the CNSA.

China’s project now has ten partner nations (Azerbaijan, Belarus, Egypt, Nicaragua, Pakistan, Russia, South Africa, Thailand, Turkey, and Venezuela) and eleven academic or governmental bureaucracies.

If all goes as planned, China hopes to have the basic station established by 2030, which it will periodcially and intermittently send astronauts.

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SLIM survives its third lunar night

9:07 am

Though it was primarily designed to prove its landing system and was never expected to resume operations after enduring the long 14-day-long lunar night, Japan’s SLIM lunar lander has successfully survived its third lunar night, resuming contact with Earth yesterday.

JAXA said on the social media platform X that SLIM’s key functions are still working despite repeated harsh cycles of temperature changes. The agency said it plans to closely monitor the lander’s deterioration.

While the newly downloaded data and photos have some scientific value, the important data is the spacecraft’s engineering status. Finding out what continues to work and what fails after each lunar night will inform engineers on what to do best to build future lunar landers and rovers.

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SpaceX and Rocket Lab complete launches

10:12 pm

Both SpaceX and Rocket Lab successfully completed launches today. First SpaceX launched another 23 Starlink satellites, its Falcon 9 rocket lifting off from Cape Canaveral. The first stage completed its ninth flight, landing on a drone ship in the Atlantic.

Shortly thereafter, Rocket Lab’s Electron rocket lifted off from one of its launchpads in New Zealand, placing two technology demonstration satellites in orbit, one testing a solar sail from NASA and the other from South Korea testing a cubesat doing optical observations of Earth. Though the first stage had the markings of a stage designed for resuse, there was no indication in the company’s live stream of any attempt to recover it.

The leaders in the 2024 launch race:

42 SpaceX
16 China
6 Russia
5 Rocket Lab

American private enterprise now leads the rest of the world combined in successful launches 49 to 28, while SpaceX by itself still leads the rest of the world, including other American companies, 42 to 35.

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Jonathan Scott – Wagner’s Ride of the Valkyries

6:01 pm

An evening pause: Performed on the organ of Rochdale Town Hall, Rochdale, UK.

Hat tip Judd Clark. To all: I could use suggestions from others. Right now Judd is doing the lion’s share of work, suggesting a lot of great evening pauses. I want more variety, however, including suggestions from many others. If you have suggested something before you know the routine. If you haven’t and want to, post a comment here, but DON’T post the link in your comment. I will contact you for it.

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It is simple: Conservatives don’t have the votes

2:53 pm

The Republican Party and its voters
The modern Republican Party and its voters

Many conservatives both in Congress and out have recently railed in fury at the compromises that House speaker Mike Johnson (R-Louisiana) has made with the Democrats in order to pass large multi-billion dollar foreign aid bills to help the Ukraine, Israel, and Taiwan protect their sovereignty and borders, while doing nothing to pass any bills to secure the American border at all.

That fury is best represented by Marjorie Taylor Greene, (R-Georgia), who has filed a motion to vacate the speaker but as yet has not followed through to force a vote. She has repeatedly condemned his willingness to work to pass Democratic Party proposals while doing little to help Republicans get their bills passed.

The problem however for Johnson is the same one faced by the previous Republican speaker, Kevin McCarthy, as well as the Republican speaker before him, Paul Ryan, and the speaker before him, John Boehner. All struggled to get Republican proposals passed, and all failed. None could garner a majority strong enough, especially because the Democrats stood firm and united in opposition and many Republicans were actually more allied with the Democratic Party agenda. It is this same problem that Greene faces and is why she has not moved to force a vote for a new speaker.
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Infeeder to a Martian paleolake

1:47 pm

Infeeder to a Martian paleolake
Click for original image.

Cool image time! The picture to the right, rotated, cropped, and reduced to post here, was taken on December 21, 2023 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It shows what the scientists label as an “inlet to a paleolake.” I have used this context camera lower resolution image taken January 14, 2023 to fill in the blank central strip caused by a failed filter on the high resolution camera.

The elevation difference between the plateau on the lower left and the lake bottom on the upper right is about 700 feet. The inlet channel floor is about 200 feet below the plateau. We know it is ancient because of the number of small craters within it as well as on the lakebed below. It has been a very long time since any water or ice flowed down this channel to drain into the lake to the north.

While a lot of analysis of orbital data has found numerous examples of paleolakes in the dry equatoral regions of Mars (see here, here, here, here, and here , this particular example is so obvious not much analysis is needed, as shown in the overview map below.
» Read more

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Scientists think methane detections by Curiosity come from the salts in the local soil

10:09 am

According to experiments conducted on Earth, some scientists believe the unexpected puffs of methane detected by Curiosity periodically come from the salts in the local soil.

Led by Alexander Pavlov, a planetary scientist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, the researchers suggest the gas also can erupt in puffs when seals crack under the pressure of, say, a rover the size of a small SUV driving over it. The team’s hypothesis may help explain why methane is detected only in Gale Crater, Pavlov said, given that’s it’s one of two places on Mars where a robot is roving and drilling the surface. (The other is Jezero Crater, where NASA’s Perseverance rover is working, though that rover doesn’t have a methane-detecting instrument.)

The theory, based on those experiments, is complicated and unconfirmed, but if so it suggests that much of the soil of Mars, its regolith, will be somewhat toxic, requiring some processing to make it possible for plants to grow in it. This is not a new discovery, but confirms past data that suggested that perchlorate — a mild acid — is found everywhere on Mars.

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Hubble celebrates 34 years in orbit with a new photo of the Little Dumbbell Nebula

9:53 am

The Little Dumbbell Nebula
Click for original image.

Cool image time! To celebrate the 34th anniversay of its launch in 1990, astronomers have used the Hubble Space Telescope to take a new photo of the Little Dumbbell Nebula (also known as M76), located about 3,400 light years away and one of the most well-known planetary nebulae in the sky.

That picture is to the right, cropped, reduced, and sharpened to post here. From the caption:

M76 is composed of a ring, seen edge-on as the central bar structure, and two lobes on either opening of the ring. Before the star burned out, it ejected the ring of gas and dust. The ring was probably sculpted by the effects of the star that once had a binary companion star. This sloughed off material created a thick disk of dust and gas along the plane of the companion’s orbit. The hypothetical companion star isn’t seen in the Hubble image, and so it could have been later swallowed by the central star. The disk would be forensic evidence for that stellar cannibalism.

The primary star is collapsing to form a white dwarf. It is one of the hottest stellar remnants known at a scorching 250,000 degrees Fahrenheit, 24 times our Sun’s surface temperature. 
The sizzling white dwarf can be seen as a pinpoint in the center of the nebula. A star visible in projection beneath it is not part of the nebula.



Pinched off by the disk, two lobes of hot gas are escaping from the top and bottom of the “belt,” along the star’s rotation axis that is perpendicular to the disk. They are being propelled by the hurricane-like outflow of material from the dying star, tearing across space at two million miles per hour.

Since launch Hubble has made 1.6 million observations of over 53,000 astronomical objects, and continues to be in high demand by astronomers, with only one request in six able to get time on the telescope. Not surprisingly, almost all of Hubble’s biggest discoveries were unexpected. Its future right now rests with its last three working gyroscopes used to orient it precisely. When one more fails, it will go to one-gyro mode, which will limit the precision of that orientation significantly. At that point the sharpness of the telescope’s imagery will sadly decline.

The only comparable orbital optical telescope now planned is China’s Xuntian optical telescope, scheduled for launch next year. It will fly in formation with the Tiangong-3 space station, allowing astronauts to periodically do maintenance missions to it. As I noted many times previously, American astronomers better start learning Chinese, assuming China even allows them access. Nor will these American astronomers have a right to complain, as it was their decision to not build a Hubble replacement, in their 2000, 2010, and 2020 decadal reports.

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German rocket startup Hyimpulse’s first suborbital rocket arrives in Australia

9:32 am

Australian commercial spaceports
Australia’s commercial spaceports. Click for original map.

The German rocket startup Hyimpulse today announced that its first suborbital rocket, the SR75, had arrived in Australia for its planned first test launch.

On 28 February, Southern Launch, the commercial outfit that manages the Koonibba Test Range, revealed that a launch attempt of the suborbital SR75 rocket would occur between late April and early May. This likely gives the team little room for the unexpected as it prepares for launch.

Those launch dates depend on whether Australia’s government will issue the launch licenses on time. So far its ability to do so in a timely manner has been difficult if not impossible. For example, the rocket startup Gilmour, which wants to launch from Bowen at about the same time, has been waiting more than two years to get its approval, delaying its first orbital test launch by more than a year.

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PLD Space announces its upcoming plans

9:22 am

Capitalism in space: Having received in late January a $43.5 million grant, bringing its total funding to more than $120 million, the Spanish rocket startup PLD Space today announced its upcoming plans.

[T]he company intends to inaugurate the first serial space rocket factory in Spain in mid-2024. The facilities will also enable vertical integration of the launchers. The industrial site, whose building work is already underway, will house the factory for the first MIURA 5 units [the company’s orbital rocket] as well as the company’s head offices. In total, PLD Space will be able to count on 18,400 square metres of industrial facilities in Elche (Alicante).

…Also scheduled for 2024, construction work is to begin on the launch base at the European CSG spaceport in Kourou (French Guiana), which belongs to CNES [France’s space agency]. This site, covering over 15,700 square metres, will host MIURA 5’s first launches.

That France is now leasing launch facilities to private companies illustrates starkly how Europe is steadily abandoning Arianespace, the European Space Agency’s government-run commercial company. Instead, Europe is now choosing competition and private enterprise as its model. Expect these new companies, including PLD, to achieve big things in the coming years.

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Voyager-1 back on line after software patch works

9:09 am

For the first time since November, Voyager-1 is sending data back to Earth coherently, after engineers figured out a way to isolate a corrupted computer chip.

The team discovered that a single chip responsible for storing a portion of the FDS memory — including some of the FDS computer’s software code — isn’t working. The loss of that code rendered the science and engineering data unusable. Unable to repair the chip, the team decided to place the affected code elsewhere in the FDS memory. But no single location is large enough to hold the section of code in its entirety.

So they devised a plan to divide the affected code into sections and store those sections in different places in the FDS. To make this plan work, they also needed to adjust those code sections to ensure, for example, that they all still function as a whole. Any references to the location of that code in other parts of the FDS memory needed to be updated as well.

The software patch was sent to the spacecraft on April 18, 2024, taking 22.5 hours to get there. It then took 22.5 hours for a response. On April 20th they received a confirmation that the patch had worked. Over the next few weeks more patches will be sent to Voyager-1 to allow it to resume sending science data back to Earth.

Both Voyager-1 and Voyager-2 were launched almost a half century ago, in 1977, and both are now more than more than 15 billion miles from Earth, traveling in interstellar space. Their computers are also the longest continuously running operating systems. Both only have a little more than two years left in their nuclear power supply, which was always expected to run out of power about a half century after launch. That both have continued to function for that entire time is a magnificent testament to the engineers who designed them.

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On the left, certainty and violent passion; On the right, doubt and fearful timidity; This must change!

3:11 pm

What the left wants to destroy
What the left wants to destroy

“If you will not fight for right when you can easily win without blood shed; if you will not fight when your victory is sure and not too costly; you may come to the moment when you will have to fight with all the odds against you and only a precarious chance of survival. There may even be a worse case. You may have to fight when there is no hope of victory, because it is better to perish than to live as slaves.” ― Winston S. Churchill

It is said that if you want to win a war, it is essential to know your enemy almost better than you know yourself, so that you know what will be required of you to win.

Americans, those who still believe in the Constitution and the basic values of our country — limited government and the right of each individual to life, liberty, and the pursuit of happiness — routinely still think they are in the majority, that given a fair fight they will always win against the fascists of the left because the general public will immediately recognize the justice of the right’s cause.

This is not only a grave error, it is an error that Americans have been making for decades. Year by year since the 1960s Americans of all stripes have been unwilling to fight for right when it could have been easily won without bloodshed. Now bloodshed is almost certainly required, and the right continues to be unwilling to fight hard. Instead it still thinks its victories can be won easily, and so it is lazy about fighting those battles.

The left

To understand best why the right continues to lose, we first have to look closely at the left. As a movement, it has for decades been passionate and unwilling to compromise. Its leaders and followers are filled with certainty, and have been willing to do whatever is necessary to win.
» Read more

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Patchy arms in a nearby spiral galaxy

9:16 am

Patchy arms in spiral galaxy
Click for original image.

Cool image time! The photo to the right, reduced and sharpened to post here, was taken by the Hubble Space Telescope to study this southern hemisphere galaxy in detail. The galaxy, dubbed ESO 422-41, is located about 34 million light years away, and thus is a relatively close neighbor. From the caption:

A spiral galaxy, with a brightly shining core and two large arms. The arms are broad, faint overall and quite patchy, and feature several small bright spots where stars are forming. A few foreground stars with small diffraction spikes can be seen in front of the galaxy.

The patchy nature of the two arms makes each somewhat indistinct, so that at first glance this galaxy looks more like a elliptical blob, until you look close and notice those arms winding around that bright core. And as patchy as those arms are, the patches of blue are regions where new stars are forming.

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China launches “remote-sensing” satellite

10:41 am

China today successfully launched what its state-run press stated was “a remote-sensing” satellite, its Long March 2D rocket lifting off from its Xichang spaceport in southwest China.

No other information about the satellite was released. The state-run press also provided no information about where the rocket’s lower stages, which carry very toxic hypergolic fuels, crashed within China.

The leaders in the 2024 launch race:

41 SpaceX
16 China
6 Russia
4 Rocket Lab

American private enterprise still leads the rest of the world combined in successful launches 47 to 28, while SpaceX by itself still leads the rest of the world, including other American companies, 41 to 34.

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Computer models suggest there is no life in Europa’s underground ocean

11:22 am

The uncertainty of science: Several different computer simulations now suggest that the underground ocean inside the Jupiter moon Europa is inert and likely harbors no existing lifeforms.

He and his colleagues constructed computer simulations of Europa’s seafloor, accounting for its gravity, the weight of the overlying ocean and the pressure of water within the seafloor itself. From the simulations, the team computed the strength of the rocks about 1 kilometer below the seafloor, or the stress required to force faults in the seafloor to slide and expose fresh rock to seawater.

Compared with the stress applied to the seafloor by Jupiter’s gravity and by the convection of material in Europa’s underlying mantle, the rocks comprising Europa’s seafloor are at least 10 times as strong, Byrne said. “The take home message is that the seafloor is likely geologically inert.”

A second computer model also suggested that the moon’s deep magna is not capable to pushing upward into that sea, further reinforcing the first model that the sea is geological inert, lacking the heat or energy required for life.

Though unconfirmed and uncertain, these results when looked at honestly make sense. Europa is a very cold world. An underground ocean might exist due to tidal forces imposed by Jupiter, but that dark and sunless ocean is also likely to be very hostile to life. Not enough energy to sustain it.

Like the water imagined to exist at poles of the Moon, we go to Europa on the hope of finding life, even if that hope is very ephermal.

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Update on SpaceX’s preparations for the 4th test flight of Superheavy/Starship

11:10 am

Link here. The article is definitely worth reading, as it tells us that SpaceX is pushing hard to be ready to launch in early May, as Musk has promised. The article also thinks SpaceX will be able to ramp up later launches to one every two months.

The article however is I think being naively optimistic about this timeline, because it naively assumes the FAA will quickly approve the launch licenses to meet that schedule. I guarantee the FAA won’t, as it has taken it one to four months after SpaceX was ready to launch to approve the licenses for the previous launches. The length of that approval process has shrunk each time, but FAA still made Space X wait each time, for no reason.

Making that schedule even more unlikely is SpaceX’s desire to do as many as nine test launches per year at Boca Chica. While the company could certainly do this, the environment reassessment issued in 2022 limits it to only five launches per year. It needs a waiver from the FAA and the Biden administration,
a waiver no one should expect considering the Biden administrations hostility to Musk.

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Slovenia signs Artemis Accords

10:58 am

NASA announced yesterday that Slovenia has become the 39th nation to sign the Artemis Accords, joining the American alliance for exploring the Moon and the solar system.

The alliance now includes these nations: Angola, Argentina, Australia, Bahrain, Belgium, Brazil, Bulgaria, Canada, Columbia, Czech Republic, Ecuador, France, Germany, Greece, Iceland, India, Israel, Italy, Japan, Luxembourg, Mexico, the Netherlands, New Zealand, Nigeria, Poland, Romania, Rwanda, Saudi Arabia, Singapore, Slovenia, South Korea, Spain, Sweden, Switzerland, the United Kingdom, the United Arab Emirates, the Ukraine, the United States and Uruguay.

As with all the recent announcements, the NASA press release now insists that the accords are designed to “reinforce and implement key obligations in the 1967 Outer Space Treaty,” the exact opposite of the original goals of the accords. Rather than overvcome the Outer Space Treaty’s restriction on private property in space, the Biden administration is now using the accords to strengthen that restriction. To quote someone (Mussolini) whose policies the modern globalist world clearly admires, “Everything in the State, nothing outside the State, nothing against the State.”

This could all change with different leadership in Washington, but whether the administrative state, led by the Democratic Party, will allow such a thing at this point in history is very questionable. And they appear aided in this totalitarian effort by a meek and largely ignorant American public.

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April 19, 2024 Quick space links

3:00 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.

 

 

 

  • Anonymous sources say NASA is considering restructuring the entire Artemis lunar program

    • One idea is to insert an extra mission before the lunar landing flight, during which Orion and Starship would dock in Earth orbit to test out their systems prior to going to the Moon. Since the whole Artemis program has always been haphazardly planned, this change makes sense, as it should have been considered from the beginning. In fact, it should be flown before the second Artemis flight, which presently intends to take astronauts around the Moon, on the first flight using Orion’s environmental systems.

 

 

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Blue Origin completes delivery of the two BE-4 engines for ULA’s second Vulcan launch

10:04 am

Blue Origin this week completed delivery of the two BE-4 engines needed for the second launch of ULA’s Vulcan rocket, presently scheduled for sometime this fall.

That launch was originally targeting an April launch, but according to official announcements has been delayed until the fall because final ground testing of its payload, Sierra Space’s Tenacity mini-shuttle, is not complete. It appears that Blue Origin also contributed to that delay, as it is now obvious that its engines were not available as planned in time for that April launch.

This delay also raises questions about Blue Origin’s ability to ramp up BE-4 engine production to meet the needs of ULA’s Vulcan rocket and Blue Origin’s New Glenn rocket. Both have large launch contracts with Amazon to launch its Kuiper constellation, while ULA also has almost as many contracts with the U.S. military. To meet those contracts, Blue Origin will have to produce several hundred BE-4 engines yearly in the very near future. Right now it appears it can only produce about one per year.

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Boeing to reduce staffing for SLS due to overall delays in Artemis

9:53 am

Boeing announced yesterday that it is going to reduce the staffing for its SLS rocket, caused by delays in other parts of the program that force it to stretch out operations.

When Boeing cites “external factors,” it is referring to the slipping timelines for NASA’s Artemis Program. In January officials with the space agency announced approximately one-year delays for both the Artemis II mission, a crewed lunar flyby, to September 2025; and Artemis III, a lunar landing, to September 2026. Neither of these schedules are set in stone, either. Further delays are possible for Artemis II, and likely for Artemis III if NASA sticks to the current mission plans.

Although the SLS rocket will be ready for the current schedule, barring a catastrophe, the other elements are in doubt. For Artemis II, NASA still has not cleared a heat shield issue with the Orion spacecraft. That must be resolved before the mission gets a green light to proceed next year. The challenges are even greater for Artemis III. For that mission NASA needs to have a lunar lander—which is being provided by SpaceX with its Starship vehicle—in addition to spacesuits provided by Axiom Space for the lunar surface. Both of these elements remain solidly in the development phase.

What Boeing is telling us indirectly is that, though NASA has not yet announced any further delays in those launch dates for Artemis-2 and Artemis-3, those dates are going to be delayed, quite possibly by one or more years.

None of this is a surprise. I have long been predicting that the first manned lunar landing in the Artemis program will not take place before 2030. In fact, that date was obvious the moment NASA announced its plan to make the Lunar Gateway space station an integral part of the program, back in 2018, when it was called LOP-G.

Now that SLS development is complete and NASA considers it “operational”, Boeing is merely reducing the staffing to maintain its assembly line, reducing it accordingly because of expected delays when additional rockets will be needed.

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