Tag: engineering

NASA makes it official: The entire Artemis schedule is delayed

9:17 am

Surprise! NASA yesterday officially confirmed the rumors reported earlier about delays in its Artemis Moon program, outlining a new schedule that pushes all the launches back from months to more than a year.

NASA will now target September 2025 for Artemis II, the first crewed Artemis mission around the Moon, and September 2026 for Artemis III, which is planned to land the first astronauts near the lunar South Pole. Artemis IV, the first mission to the Gateway lunar space station, remains on track for 2028.

The agency cited issues with its Orion capsule that need fixing, including unexpected damage to its heat shield during the first test flight in 2022, battery problems found during ground testing, and new issues discovered with the as-yet unflown environmental systems designed to keep the astronauts alive.

One rumor that did not turn out to be true was the suggestion that first manned lunar landing would be shifted from Artemis 3 to Artemis 4, to give NASA more time to test things.

More details about the press briefing can be found here.

No one should take any of these dates seriously. NASA technique for announcing delays in this moon program have consistently been wrong. It announces small delays incrementally, to hide the fact that it knows the actual launch will be delayed far more that politics allows. The program was first proposed in 2004 with a planned landing in 2015. Since then NASA has announced numerous delays numerous times, always in small amounts. Yet by 2015 it was clear the first landing wouldn’t happen for at least a decade (after a decade of work), because of Obama’s unilateral cancellation of the initial program and Congress’s demand that it be re-established in a different form. By 2022 it was clear that the first manned landing mission was at least five years away.

Thus these new dates will certainly slip. You can bet on it. As I noted yesterday, NASA will be lucky to make that first manned lunar landing by 2030.

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The Surt volcano on Io

1:19 pm

The Surt volcano on Io in close-up
Click for original image.

Cool image time! The picture to the right, rotated, reduced, and sharpened to post here, was taken by Juno during its 57th close-fly of Jupiter on December 30, 2023. It shows of one of the many volcanoes that cover and continually recoat the surface of the Jupiter moon Io.

The picture was initially processed by citizen scientist Gerald Eichstädt. Thomas Thomopoulos then zoomed in and added additional enhancements to this particular area. (I thank Thomas for his additional help in making this post happen.)

The location is an active volcano named Surt, which has been observed to erupt several times since the 1970s, with its February 2001 eruption the most powerful yet observed on Io, though the pictures by the Jupiter orbiter Galileo taken before and after revealed few significant surface changes.

The picture itself shows a region where major changes have definitely occurred. The large arc of mountains across the photo’s center suggests the remaining half of a large caldera, its northern half now either buried or destroyed. The deep obvious hole inside that crescent appears to be the main vent from which the recent eruptions have spewed, as indicated by the light-colored apron surrounding it.

In the southwest section of that large mountain arc is a distinct ridgeline with a small circular curve in its middle that suggests a former volcanic cone, its northern half now gone.

To put it mildly, Io appears a very alien place, shaped entirely and continuously by endlessly volcanic eruptions that spread lava across its entire surface repeatedly.

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Rocket Lab gets contract to build 18-satellite constellation for U.S. military

9:36 am

Rocket Lab was yesterday awarded a half billion dollar contract to build the next set of eighteen satellites of the U.S. military’s Tranche communications satellite constellation.

Rocket Lab will act as prime contractor for the $515 million USD firm-fixed price agreement, leading the design, development, production, test, and operations of the satellites, including procurement and integration of the payload subsystems. The contract establishes Rocket Lab’s position as a leading satellite prime contractor, providing supply chain diversity to the Department of Defense (DoD) through vertical integration. The contract comprises $489 million base plus $26 million of incentives and options and will be carried out by Rocket Lab National Security (RLNS), the Company’s wholly owned subsidiary created to serve the unique needs of the U.S. defense and intelligence community and its allies.

The plan is for these satellites to launch in 2027. It does not appear that the contract includes the launches itself. Rocket Lab can do some, but it is likely the military will award some to SpaceX and others.

This deal continues the military’s shift from designing and building its own satellites that usually cost too much and are years behind schedule to buying the product from the private sector. It also continues the shift from large unwieldly and very exposed single satellites to constellations of many small satellites that are difficult to destroy..

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China launches X-ray space telescope

9:25 am

China early today successfully used its Long March 2C rocket to launch its new Einstein X-ray space telescope, built in partnership with the European Space Agency (ESA). The rocket lifted off from the Xichang spaceport in the southwest of China.

Astronomers will use the telescope to study the high energy released by during supernovae. It will also be used to study black holes and other high energy deep space phenomenon.

Meanwhile, the lower stages of the rocket, which use toxic hypergolic fuels, fell somewhere in China. No word if they landed anywhere near habitable areas.

The 2023 launch race:

3 SpaceX
2 China
1 India
1 ULA

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Layered volcanic vent on Mars

3:53 pm

Layered volcanic vent on Mars
Click for original image.

Cool image time! The picture to the right, rotated, cropped, reduced, and sharpened to post here, was taken on August 31, 2023 by the high resolution camera on Mars Reconnaissance Orbiter (MRO), and shows what the science team labels as a “vent near Olympica Fossae.”

The grade within the fissure is downhill to its center. Outside the vent the grade is downhill to the north and south, with the overall grade sloping to the west as well. Note the layers on each side of the depression. Each indicates another volcanic flood event that laid down another layer of lava. At some point this vent either blew up through those layers, or it had remained opened during all those many events, the lava flowing out and acting like water to erode the layers on the north and the south.

As always, the scale of Martian geology is daunting, as shown by the overview map below.
» Read more

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Astrobotic’s Peregrine lunar lander suffers major failure

12:10 pm

According to updates by the engineering team running Astrobotic’s Peregrine lunar lander, launched early today by ULA’s Vulcan rocket, the lander’s propulsion system suffered a major failure shortly after activation.

After successfully separating from United Launch Alliance’s Vulcan rocket, Astrobotic’s Peregrine lunar lander began receiving telemetry via the NASA Deep Space Network. Astrobotic-built avionics systems, including the primary command and data handling unit, as well as the thermal, propulsion, and power controllers, all powered on and performed as expected. After successful propulsion systems activation, Peregrine entered a safe operational state. Unfortunately, an anomaly then occurred, which prevented Astrobotic from achieving a stable sun-pointing orientation.

The company later released an update, stating that the failure caused “a critical loss of propellant” that will make the mission impossible as planned. They are reassessing to see if they can come up with an alternate plan, but without sufficient fuel no lunar landing will be possible under any mission profile.

Peregrine is a smaller test version of Astrobotic’s larger Griffin lunar lander, which has contracts with NASA and ESA for later missions. This failure will likely impact those missions, forcing either delays or redesigns.

This mission was always an engineering test mission designed to prove out Astrobotic’s landing design, so experiencing a failure was not a surprise. The problem is that this failure occurred so soon after launch that it prevents the company from testing that landing design, at all.

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One spiral galaxy eating another

9:51 am

One spiral galaxy eating another
Click for original image.

Cool image time! The picture to the right, cropped, reduced, and sharpened to post here, was taken by the Hubble Space Telescope as part of an on-going survey of known pecular-looking galaxies. This pair is believed to be 570 million light years away. From the caption:

Galaxies are composed of stars and their solar systems, dust and gas. In galactic collisions, therefore, these constituent components may experience enormous changes in the gravitational forces acting on them. In time, this completely changes the structure of the two (or more) colliding galaxies, and sometimes ultimately results in a single, merged galaxy. That may well be what results from the collision pictured in this image. Galaxies that result from mergers are thought to have a regular or elliptical structure, as the merging process disrupts more complex structures (such as those observed in spiral galaxies). It would be fascinating to know what Arp 122 will look like once this collision is complete . . . but that will not happen for a long, long time.

From our viewpoint, the spiral galaxy at the top appears warped by the gravitational pull of the face-on spiral at the bottom, as if it is being sucked into the bottom galaxy. In truth, both galaxies are pulling on each other. If we could circle around and see them in three dimensions we would almost certainly see distortions in the bottom spiral as well.

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Scientists: Suspended iron minerals floating in Venus’s atmosphere explain dark UV streaks

9:37 am

Venus as seen in ultraviolet by Mariner 10, February 5, 1974
Venus as seen in ultraviolet by Mariner 10,
February 5, 1974

The uncertainty of science: Since the mid-1970s scientists have been trying to figure out the cause of the dark streaks seen in the atmosphere of Venus when photographed in ultraviolet. The image to the right was the first such UV image, taken by Mariner 10 during its fly-by on its way to Mercury. These streaks are caused by some unknown material that absorbs the UV light.

Researchers have now proposed that two different iron-bearing minerals, floating in Venus’s atmosphere, are what cause these dark UV streaks. From the absract:

Our results demonstrate that ferric iron can react with sulfuric acid to form two mineral phases: rhomboclase [(H5O2)Fe(SO4)2·3H2O] and acid ferric sulfate [(H3O)Fe(SO4)2]. A combination of these two mineral phases and dissolved Fe3+ in varying concentrations of sulfuric acid are shown to be good candidates for explaining the 200- to 300-nm and 300- to 500-nm features of the reported unknown UV absorber.

Iron has been detected in the atmosphere previously, and is theorized could come from volcanic eruptions on the planet’s million-plus volcanoes.

This new hypothesis explaining the dark UV absorber however remains unconfirmed, and joins a list of other candidates for that absorber, many of which propose either iron or sulfur in different combinations. Because so little data really exists about the atmosphere of Venus, with what is known also uncertain, it is presently impossible to solve this mystery with confidence. The problem is made even more difficult in that scientists understand almost nothing about the chemistry of materials under the conditions seen in Venus’s atmosphere, which is extremely hot (800 degrees Fahrenheit) and very thick and dense (100 times that of Earth).

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ULA’s Vulcan rocket successfully places payload in orbit on first launch

1:10 am

Vulcan at liftoff.
Vulcan at liftoff.

After four years of delay, mostly caused by delays at Blue Origin in delivering the two BE-4 engines used in the first stage, ULA’s Vulcan rocket finally completed its first launch early on January 8, 2024, lifting off from Cape Canaveral and successfully placing Astrobotic’s Peregrine lunar lander into orbit.

As of posting the upper stage had just deployed Peregrine, which will leave Earth orbit in about four days using its own engines. The upper stage has one more burn to send it into solar orbit, carrying the ashes of numerous people for the company Celestis.

The 2024 launch race:

3 SpaceX
1 India
1 China
1 ULA

For ULA, this launch is a very big deal. It is the first of two required in order for the Space Force to certify the rocket for future military launches. It also positions the company to begin the many launches that Amazon has awarded it to place into orbit a large percentage of that company’s Kuiper internet satellite constellation, assuming of course Blue Origin can deliver on schedule the many BE-4 engines that ULA will require.

This launch will also likely lead to the sale of ULA. » Read more

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NASA: UAE to build airlock module for lunar station plus have astronaut fly there

9:20 am

According to a press release from NASA today, the United Arab Emirates (UAE) will build the airlock module for the Lunar Gateway space station plus have one astronaut fly a mission to the station after it is built.

Under a new implementing arrangement expanding their human spaceflight collaboration with NASA through Gateway, MBRSC will provide Gateway’s Crew and Science Airlock module, as well as a UAE astronaut to fly to the lunar space station on a future Artemis mission.

I strongly suspect that the UAE will mostly pay for this module to be built, hiring outside contractors from either the U.S. or Europe to do the work.

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