Tag: engineering

Successful deployment of large array antennas on all five AST’s satellites

12:48 pm

AST SpaceMobile has now successfully unfolded the large array antennas on all five the satellites it launched in September, and did so six weeks ahead of schedule.

“The unfolding of the first five commercial satellites is a significant milestone for the company. These five satellites are the largest commercial communications arrays ever launched in low Earth orbit,” commented Abel Avellan, founder, Chairman and CEO of AST SpaceMobile, in a statement. “It is a significant achievement to commission these satellites, and we are now accelerating our path to commercial activity.”

The satellites are designed to act like cell towers in space, providing direct satellite-to-cellphone coverage and fill gaps in ground-based cell service. ATT has already signed a contract with AST to use these satellites.

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Lab tests suggest water brines could also exist on large asteroids

12:28 pm

Gullies in crater on Vesta
Click for original image.

In attempting to explain the existence of flow features that have been found on the interior walls of craters on the asteroids Ceres and Vesta — as shown in the image above — scientists recently performed a laboratory experiment which determined that a mixture of water and salt could produce those gullies.

The team modified a test chamber at the Jet Propulsion Laboratory to rapidly decrease pressure over a liquid sample to simulate the dramatic drop in pressure as the temporary atmosphere created after an impact on an airless body like Vesta dissipates. According to Poston, the pressure drop was so fast that test liquids immediately and dramatically expanded, ejecting material from the sample containers.

“Through our simulated impacts, we found that the pure water froze too quickly in a vacuum to effect meaningful change, but salt and water mixtures, or brines, stayed liquid and flowing for a minimum of one hour,” said Poston. “This is sufficient for the brine to destabilize slopes on crater walls on rocky bodies, cause erosion and landslides, and potentially form other unique geological features found on icy moons.”

The press release makes it sound as if this result makes the existence of subsurface water ice more likely on such asteroids as Ceres and Vesta, but previous research from the Dawn asteroid probe made that fact very clear, especially for Ceres, years ago. All this does is provide some evidence of what might be one process by which these erosion gullies form.

Hat tip to reader Milt.

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Perseverance looks across Jezero Crater from on high

11:11 am

Panorama of Jezero Crater
Click for full resolution annotated image. Click here for unannotated full resolution image.

Cool image time! The panorama above, cropped, reduced, and sharpened to post here, was assembled from 44 pictures taken by the rover Perseverance on September 27, 2024 as it began its climb up the rim of Jezero Crater. If you click on it you can see the full resolution image that is also annotated to identify features within the crater as well as places where Perseverance has traveled.

The overview map below, with the blue dot showing the rover’s location when this panorama was taken. The yellow lines indicate the area covered by the panorama, with the arrow indicating the direction.

Overview map
Click for interactive map.

According to the information at the link, the rover has been experiencing some slippery sandy ground as it has been climbing.
» Read more

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Two cubesats on Hera signal home

10:07 am

Engineers on the ground have now established good communications with the two cubesats that are being carried by the European probe Hera on its way to the binary asteroids Didymos and Dimorphos.

“Each CubeSat was activated for about an hour in turn, in live sessions with the ground to perform commissioning – what we call ‘are you alive?’ and ‘stowed checkout’ tests,” explains ESA’s Hera CubeSats Engineer Franco Perez Lissi.

…Travelling with Hera are two shoebox-sized ‘CubeSats’ built up from standardised 10-cm boxes. These miniature spacecraft will fly closer to the asteroid than their mothership, taking additional risks to acquire valuable bonus data.

Juventas, produced for ESA by GOMspace in Luxembourg will make the first radar probe within an asteroid, while Milani, produced for ESA by Tyvak International in Italy, will perform multispectral mineral prospecting.

This use of small cubesats in conjunction with a larger interplanetary probe is becoming increasingly routine, and provides a cheap and efficient way to increase the data and information obtained. Note too that both cubesats were apparently built entirely by private companies, thus establishing their creditionals as providers of interplanetary probes.

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ExoAnalytic now identifies more than 500 pieces from Intelsat satellite breakup

9:57 am

The private commercial space tracking company ExoAnalytic has now identified more than 500 pieces from Intelsat 33e satellite breakup.

Some of the smaller debris might actually quickly disappear as these pieces are possibly bits of solid fuel that will evaporate.

Much of the press has suddenly decided this failure is all Boeing’s fault, because the satellite was built by that company a decade ago. This seems a bit unfair, since Boeing’s problems now seem far removed from its design and construction of satellites then. At the same time one must wonder. Boeing built four of these type satellites for Intelsat, and the first was lost in 2019 when either it was hit by a meteor or had “a wiring flaw, which led to an electrostatic discharge following heightened solar weather activity.”

That means two of the four satellites have been lost, though the second, 33e, didn’t break-up until twelve years of operation, almost its expected lifespan. Furthermore, the other two satellites are still working fine.

All in all, that suggests to me that though there may be a technical cause that can be traced back to the company, it is more likely we are simply seeing a random expression of the dangers of space to engineering, by anyone.

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NASA picks nine lunar south pole candidate sites for Artemis-3 manned landing

10:37 am

The Moon's south pole, with candidate landing sites
Click for NASA’s original image.

NASA today revealed the nine candidate sites in the Moon’s south polar region for its Artemis-3 manned mission, presently targeting a 2026 launch date.

The map to the right shows the location of those nine sites, numbered in order of priority, as follows:

  • 1. Peak near Cabeus B
  • 2 . Haworth
  • 3. Malapert Massif
  • 4. Mons Mouton Plateau
  • 5. Mons Mouton
  • 6. Nobile Rim 1
  • 7. Nobile Rim 2
  • 8. de Gerlache Rim 2
  • 9. Slater Plain

The map also shows the planned landing sites for Intuitive Machine’s Athena lander in January 2025, and China’s Chang’e-7 lander in 2026, as well as where India’s Virkam lander touched down in 2023.

Cabeus B is likely the prime candidate site because its high elevation will make communciations easier, while placing it closer to the crater Cabeaus, which was impacted by the LCROSS mission in 2009 and found a significant signature of water in the ejecta plume of that impact.

To make a final decision NASA will be consulting all players, from the science community as well as the engineers. All of this however depends on other factors outside of science and engineering, mostly related to politics and practicality. The entire mission relies on the full version of the SLS rocket, the manned lunar version of SpaceX’s Starship, launched by Superheavy, and a working version of Lockheed Martin’s Orion capsule, none of which are presently flightworthy.

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Old rockets clash with new rockets in Europe

9:35 am

Two stories today from Andrew Parsonson at his website Europeanspaceflight.com today illustrate the battle going on in Europe’s vast space bureaucracy over its future rocket development, and clearly tell us who is winning.

First Parsonson described a presentation put forth by Arianespace officials at an “Ariane-6 User’s Club” meeting two weeks ago, outlining the planned and proposed upgrades Arianespace intends for the Ariane-6 rocket over the next decade. All the upgrades are focused on increasing the rocket’s payloac capacity. None will make any of the rocket reusable in order to lower its high cost which makes it uncompetitive in the modern launch market.

What was significant about Parsonson’s report is that he also noted that many of these upgrades need to be approved by the European Space Agency (ESA), and its officials won’t make that decision until 2025 during a planned conference. Thus, this presentation by Arianespace was essentially a lobbying effort to convince ESA to approve these upgrades.

Parsonson’s second story then told us what ESA is approving, right now.

The European Space Agency has selected Rocket Factory Augsburg, The Exploration Company, ArianeGroup, and Isar Aerospace to develop reusable rocket technology.

On 9 October, ESA held its Future Space Transportation Award Ceremony in Paris. During the event, the agency announced the four awardees under two initiatives focused on the development of reusable rocket technology: the Technologies for High-thrust Reusable Space Transportation (THRUST!) project and the Boosters for European Space Transportation (BEST!) project.

Except for ArianeGroup, these are new startups. The German companies Rocket Factory and Isar are developing their own rockets, while the French company Exploration has so far focused on making cargo capsules to supply future space stations.

ArianeGroup meanwhile is the joint partnership between Airbus and Safran that built and owns the Ariane-6, and actually has more say on its future than Arianespace, which is merely a government agency that in the past (but no more) managed and controlled all of Europe’s rockets. ArianeGroup hasn’t abandoned Ariane-6 by no means, but clearly is shifting its interests in new directions.

Interestingly, the final decisions on some of these reusable projects will be made at that same 2025 conference.

Want to bet that ESA at that conference shifts its focus from upgrading the non-reusable Ariane-6 and instead goes whole hog for reusability? I expect that, especially because all recent political signs at ESA has indicated no interest in maintaining Arianespace any longer. For example, ESA has taken the Vega family of rockets away from Arianespace and given it back to Avio, the Italian company that manufactures it. ESA has also returned management of French Guiana from Arianespace to France’s space agency, which owns the site.

Designed as the commercial arm of ESA, it no longer has a function, now that Europe is shifting from the Soviet-model of its rocket operation run by the government (Arianespace) to a capitalism model where competing independent companies provide products and services to that government.

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ISRO head unveils new timeline for major missions

10:06 am

The head of India’s space agency ISRO, S. Somanath, yesterday unveiled a new timeline for several of that nation’s major missions, both manned and unmanned.

The new timeline is as follows:

  • 2025: NISAR: a joint Indian-American radar orbiter, long delayed
  • 2026: Gaganyaan-1, India’s first manned orbital mission
  • 2028: Chandrayaan-4, an unmanned sample return mission to the Moon
  • 2028: Chandrayaan-5, a joint lander-rover to the Moon

The last project will be done in partnership with Japan, with India building the lander and Japan the rover.

2028 will be a very busy year for India in space. The Indian government had previously announced that ISRO would launch in 2028 the first module of its space station as well as a Venus orbiter.

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Unidentified astronaut from recent ISS mission released from hospital

9:54 am

Though NASA’s press release provided little informationto protect the astronaut’s privacy, including his or her name, the unidentified astronaut who was held overnight for observation after returning from a seventh-month stay on ISS mission has now been released from the hospital.

After an overnight stay at Ascension Sacred Heart Pensacola in Florida, the NASA astronaut was released and returned to NASA’s Johnson Space Center in Houston Saturday. The crew member is in good health and will resume normal post-flight reconditioning with other crew members.

This has happened before. Readapting to a 1G environment after months in weightlessness can be difficult, even if one does all the exercises required while in orbit.

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SpaceX yesterday launched another 23 Starlink satellites

5:34 pm

SpaceX yesterday successfully launched 23 more Starlink satellites, its Falcon 9 lifting off from Cape Canaveral in Florida.

While the video link above says 23, a UPI report said the launch placed 22 satellites in orbit. I have no idea which is right, as the number of Starlinks on these launches range from 20 to 23.

The first stage completed its 19th flight, landing on a drone ship in the Atlantic.

The leaders in the 2024 launch race:

105 SpaceX
48 China
11 Russia
11 Rocket Lab

American private enterprise now leads the rest of the world combined in successful launches 122 to 71, while SpaceX by itself now leads the entire world, including American companies, 105 to 88.

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One unidentified astronaut hospitalized after return to Earth today

9:04 pm

Though NASA has released very little information, including the indentity of the astronaut, one of the four crew who were brought back to Earth early today has ended up in the hospital.

NASA said Friday one its astronauts is in a hospital in Florida for medical observation after a “normal” predawn splashdown in the Gulf of Mexico inside a SpaceX capsule.

The mission’s other three crew members were cleared to return to their home base at Johnson Space Center in Houston after their own medical evaluations, NASA said.

The hospitalized astronaut “is in stable condition and under observation as a precautionary measure,” a NASA spokesperson said in a statement. The agency did not identify the astronaut or provide any more details about their condition, citing medical privacy protections.

That the other three astronauts returned to their home base at Johnson in Houston strongly suggests the hospitalized astronaut is the one Russian, Alexander Grebenkin, Normally Russians head back to Russia relatively quick after landing.

This remains speculation. We will have to wait for more information.

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Boeing considering selling its space division

11:55 am

According a Wall Street Journal exclusive today (behind a paywall), the company is now exploring the possibility of selling off its space division.

The NASA business that Boeing is exploring a sale of includes the troubled Starliner space vehicle and operations that support the International Space Station, but excludes the unit building NASA’s Space Launch System, the newspaper reported.

The U.S. planemaker’s shares rose 0.6% in afternoon trading.

Boeing’s space division includes its Starliner capsule and its work on NASA’s SLS rocket, as well as building many of the modules on ISS and operating it for NASA.

If this is so, it appears the new CEO, Kelly Ortberg, has decided that in order to get the company back on track it needs to focus on Boeng’s first and central business, building airplanes. Space is a distraction that is not helping the company bottom line right now in any way. Furthermore, NASA in 2020 told Boeing it would not entertain any new project bids from the company because its past bids were so poorly conceived. That decision remains in effect now, four years later. Since then Boeing has only have gotten a renewal contract to build more SLS rockets, plus a contract to develop a new airplane wing, but little else.

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SpaceX rolls out the next Superheavy for sixth test orbital launch

9:59 am

SpaceX in a tweet on October 22, 2024 announced the roll out to the launch tower of the next Superheavy to be used in the sixth orbital test flight, only nine days after that launch tower had successfully caught a Superheavy at the end of the fifth orbital test flight.

Though no launch date has been announced, the company is clearly wants to do it soon. Though its present launch license allows it go when ready, it remains unclear whether it will get that approval from the FAA when requested. FAA upper management has repeatedly indicated a desire to delay its approvals to SpaceX, and until there is a change in the White House — thus forcing a change in that FAA upper management — there is no reason to expect the agency to change its behavior.

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Spaceport startup SUAS Aerospace signs deal to launch small suborbital rocket from west coast of Ireland

9:49 am

SUAS's proposed spaceport plan
Click for original image.

The Irish spaceport startup SUAS Aerospace has now signed a partnership deal with the Netherlands rocket startup T-Minus Engineering to launch a small suborbital rocket from west coast of Ireland in order to demonstrate the viability of Ireland as a potential spaceport location.

According to this report, “T-Minus will provide its Dart rocket for the launch. Dart stands at 3.5 metres and is capable of carrying payloads of up to 3.5 kilograms to a maximum altitude of 200 kilometres.”

Though SUAS has raised €5 million in private investment capital to push its project to build two launch sites within Ireland, it has not made it clear the exact locations of these sites, other than indicating it wants to place them at two locations on Ireland’s west coast, as shown by the company graphic to the right. I suspect it does not yet have rights to the land, and its lobbying effort is largely focused on getting government help to obtain those rights, either on public or private land.

For example, its press release does not provide any details on where this suborbital launch will occur. I am not even sure the company knows. It might simply arrange some coastal location, simply to make possible this demonstration launch, even if that place is not the actual location of its proposed spaceport.

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JPL unveils website for viewing all high resolution imagery so far taken of Europa

9:29 am

In anticipation of the eventual arrival of Europa Clipper in orbit around Jupiter to begin its close investigation of that planet’s moon Europa, JPL yesterday unveiled a website that allows a view to quickly find and review all the high resolution imagery so far taken of Europa by the Jupiter orbiters, Voyager, Galileo, and Juno.

You can visit the Europa Trek portal website here.

The announcement touts the webpage’s ability to take viewers on “fly-overs” of the terrain, but that’s just a bell and whistle claim of little importance. More significant is the easy access this webpage provides to all that imagery, organized in context with a global map of the planet. Not only can anyone quick find interesting features, you can do so within the global context of the whole planet. In addition, the page provides detailed commentary about each image.

When Europa Clipper arrives this portal will be invaluable in deciphering the significance of every new image and datapoint.

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Boeing forced to take another $250 million charge on Starliner

9:19 am

Because of the continuing problems getting its Starliner manned capsule operational, Boeing has now taken another $250 million charge on the project, raising the total spent of its own money to $1.85 billion.

The company’s original fixed-price contract with NASA to deliver the capsule was $4.2 billion. The bulk of that won’t be paid until Starliner begins flying astronauts commercially, and NASA has now delayed that until 2026 at the earliest. The company’s new CEO, Kelly Ortberg, has now made it clear that he is focused on imposing changes to fix the bankrupt engineering management culture that has caused it so many failures in so many of its recent projects, not just Starlner. In his remarks announcing the company’s third quarter results, he said this:

The trust in our company has eroded. We’re saddled with too much debt. We’ve had serious lapses in our performance across the company which have disappointed many of our customers.

In addressing these issues Ortberg listed a whole range of changes, many of which focused on getting managers more closely involved in design and construction, or as he said, management needs “to be on the factory floors, in the back shops and in our engineering labs.”

Whether he will succeed is unknown. Its factory workers today rejected a new contract offer, continuing their now six-week strike that has halted work on company’s airplane business. In addition, Boeing reported a loss of $6 billion in that third quarter report.

One thing Ortbeg did make clear this week however: Boeing is not walking away from its Starliner contract with NASA. At a minimum it will complete that initial fixed price contract. Whether it will go on to fly more Starliner missions however Ortberg left open. I suspect he remains in negotiation with NASA over this issue.

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Dragon Endeavour undocks from ISS to bring 4 astronauts home

8:48 am

After more than a month delay resulting first from the issues with Starliner and then by poor weather in the splashdown zones, SpaceX’s Endeavour capsule today finally undocked from ISS, with a planned splashdown on October 25, 2024 at approximately 3:29 am (Eastern) off the coast of Florida. I have embedded the live stream of that splashdown below.

The capsules brings home three Americans and one Russian after a seven-month-long mission.
» Read more

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Review of the four private space stations presently under construction

8:41 am

Link here. The review provides a nice summary of the status of all four stations, being built by Axiom, Vast, and consortiums led by Blue Origin (Orbital Reef) and Voyager Space (Starlab).

The article included one piece of new news, based on recent stories suggesting major financial issues at Axiom:

As a result of these issues, the Axiom Station is believed to have been downsized to two modules from the originally planned four. There will be a reduced research capability from this arrangement compared to what was expected. However, it remains to be seen if additional capability can be added after the station becomes operational.

The original plan had been to separate the station from ISS once all four modules were launched. Whether it will be able to do so, flying independent of ISS’s systems with only two modules is unclear.

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SpaceX launches 23 more Starlink satellites

8:34 pm

SpaceX today successfully launched another 23 Starlink satellites, its Falcon 9 rocket lifting off from Cape Canaveral in Florida.

The first stage completed its 18th flight, landing on a drone ship in the Atlantic.

The leaders in the 2024 launch race:

103 SpaceX
48 China
11 Russia
11 Rocket Lab

American private enterprise now leads the rest of the world combined in successful launches 120 to 71, while SpaceX by itself now leads the entire world, including American companies, 103 to 88.

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A pointy mesa once washed by theorized Martian ocean

11:09 am

A pointy mesa on Mars
Click for original image.

Today’s cool image returns to the same region yesterday’s cool image visited. The picture to the right, cropped, reduced, and sharpened to post here, was taken on July 21, 2024 by the high resolution camera on Mars Reconnaissance Orbiter (MRO). It was clearly taken to get a close look at this unusual pointy mesa.

MRO elevation data says this mesa is about 800 feet height. The color difference between the north and south flanks suggests the accumulated presence of dust on the north, suggesting the prevailing winds here come from the northeast and blow to the southwest. This conclusion is reinforced by the dark accumulated dust found in the southwest quadrants of all the crater floors in the full image. The wind blows this dust into the craters, where it gets trapped against the southwest crater wall.

Note the mesa’s wide base, with one crater partly eaten away on its eastern edge. The overall shape of this base suggests that it was carved by some flow coming from the southwest, as indicated by the arrow.
» Read more

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A slight bend in one boom delays NASA solar sail flight

9:07 am

Even though NASA’s solar sail test mission, dubbed the Advanced Composite Solar Sail System (ACSSS), successfully unfolded its giant sail in late August, engineers have not yet reactivated the sail’s attitude control system because they have detected a slight bend in one of the sail’s four booms.

While the solar sail has fully extended to its square shape roughly half the size of a tennis court, the mission team is assessing what appears to be a slight bend in one of the four booms. This likely occurred as the booms and sail were pulled taut to the spacecraft during deployment. Analysis indicates that the bend may have partially straightened over the weeks since boom deployment, while the spacecraft was slowly tumbling.

The attitude control system was turned off as planned during the deployment, allowing the sail to slowly tumble. It has been kept off longer than expected because the tumbling appears to be helping straighten the bend.

Once the control system is reactivated, the mission will then attempt to use the sail to change its orbit, to actually fly in space using sunlight like the wind.

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ULA begins stacking Vulcan for military launch, anticipating Pentagon approval

8:56 am

Though the Space Force is still reviewing the nozzle issue on the second flight of ULA’s Vulcan rocket and has not yet certified the rocket for military operational launches, ULA has begun stacking the next Vulcan for an anticipated military launch of a national security satellite.

On Monday [October 21], ULA shared photos of the 109.2-foot-long (33.3 m) booster being hoisted into the Vertical Integration Facility to begin the stacking process. In the days and possibly weeks to come, the 38.5-foot-long (11.7 m) Centaur 5 upper stage will be added along with four solid rocket boosters and the payload fairings.

It appears that the military has accepted Vulcan for this launch because — despite the nozzle falling off of
a strap-on side booster — the rocket was successful in placing its payload in its precise orbit. The Space Force is simply completing the paperwork required for certification.

No date however has been set, but the company hopes to complete two military Vulcan launches in 2024, so it won’t be that far in the future.

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The obvious visual evidence for assuming Mars once had catastrophic floods

12:03 pm

The obvious visual evidence of past catastropic floods on Mars
Click for original image.

Since the first comprehensive orbital data of Mars was sent back in the early 1970s by Mariner 9, scientists have generally concluded that many of the features seen at the eastern end of the giant Valles Marineris canyon were caused by one or several catastrophic floods.

The picture to the right, rotated, cropped, and reduced to post here and taken on July 26, 2024 by the high resolution camera on Mars Reconnaissance Orbiter (MRO), provides a good example of why the scientists have come to that conclusion. It shows what the camera team labels a “streamline feature surrounding crater.” I have added the arrows to indicate the presumed direction of flow. The flow went around this 2.5-mile-wide unnamed crater because the impact had compacted it, making it resistent to erosion. The flow however was strong and large enough to wash away the plateau on which the crater sits, as well as cutting into the crater’s southwest rim. In addition, the rim on the southeast was also cut through at some point, this time from what might have been flow eddies as the flood pushed past.

Hence, the theory of catastrophic floods.

» Read more

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SpaceX asks FCC for license revision for launching nearly 30,000 Starlink satellites

8:51 am

SpaceX on October 11, 2024 submitted a request to the FCC to revise its Starlink satellite license to cover a revised plan for its second generation satellites that includes a request to place 29,988 Starlink satellites in orbit.

SpaceX first requests several amendments to the orbital parameters of its Gen2 system between 340 km and 365km altitude to keep pace with rapidly evolving global demand for high-quality broadband. First,SpaceX amends the inclination of its orbital shell at a nominal altitude of 345 km from 46 degrees to 48 degrees. SpaceX also amends its pending Gen2 application to seek authority to operate satellites in its Gen2 system in two additional orbital shells — at 355 km altitude in a 43-degree inclination and at 365 km altitude in a 28- or 32-degree inclination. The total number of operational satellites will remain 29,988 satellites across the amended Gen2 system.

With the exception of its polar shell at 360 km, which will remain unchanged, SpaceX also amends its application to more flexibly distribute satellites in its shells between 340 km and 365 km than requested in its pending application, specifically, in up to 72 planes per shell and up to 144 satellites per plane. While this reconfiguration will result in two additional shells and a higher maximum number of orbital planes and satellites per plane for all but one shell between 340 km and 365 km, the total number of operational satellites in the Gen2 system will remain 29,988 satellites.

In the company’s previous request for this number of satellites, the FCC had approved only 7,500, the full request still pending. We can expect objections from the other big satellite constellations to this request. The FCC’s response remains unclear. There could be legitimate reasons to limit SpaceX request, but it is also possible politics will enter the decision as well, for illegitimate reasons.

Meanwhile, astronomers are already whining about the problems these Starlink satellites will cause to their ground-based telescopes. It seems these so-called brilliant scientists can’t get it through their heads that astronomy from Earth will become increasingly difficult in the coming years — with hundreds of thousands of satellites planned from many satellite constellations, not just SpaceX — while astronomy from space has always been a better choice anyway. Rather than demand regulation or restrictions on these new satellite constellations, they should be pushing hard to developing new orbiting telescopes, now, for launch as quickly as possible.

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China launches three radar satellites

8:33 am

China today successfully launched three radar satellites, its Long March 6 rocket lifting off from Taiyuan spaceport in northeast China.

The news report from China’s English state-run press made believe this launch was only one satellite, in contrast to its Chinese language press. It also did not provide information on where the rocket’s first stage crashed within China, nor whether any upgrades have been done to the Long March 6’s upper stage to prevent it from breaking apart and scattering low Earth orbit with space junk, as has now happened four times previously.

The leaders in the 2024 launch race:

102 SpaceX
48 China
11 Russia
11 Rocket Lab

American private enterprise now leads the rest of the world combined in successful launches 119 to 71, while SpaceX by itself now leads the entire world, including American companies, 102 to 88.

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Intelsat satellite breaks up in geosynchronous orbit

12:09 pm

An Intelsat communications satellite launched in 2016 has broken up in its high geosynchronous orbit, scattering into as many as 57 pieces of debris.

“U.S. Space Forces-Space (S4S) has confirmed the breakup of Intelsat 33E (#41748, 2016-053B) in GEO on October 19, 2024, at approximately 0430 UTC,” states an alert posted on SpaceTrack, the U.S. Department of Defense’s space-tracking platform. “Currently tracking around 20 associated pieces – analysis ongoing. S4S has observed no immediate threats and is continuing to conduct routine conjunction assessments to support the safety and sustainability of the space domain.”

Douglas Hendrix, CEO of ExoAnalytic Solutions, said the U.S.-based space-tracking company identified 57 pieces of debris Oct. 21 associated with the breakup. “We are warning operators of any spacecraft that we think are at risk of collision,” Hendrix said via email.

This satellite, which served Europe, Africa, and parts of Asia, has had thruster issues since launch, suggesting the breakup might have been caused by similar issues.

At the moment is is unclear whether the debris will threaten other satellites in geosynchronous orbit.

The break-up once again highlights the profit potential for companies capable of removing such space junk. Communications companies like Intelsat as well as others in close orbits would certainly be willing to pay someone to clean things up, for many reasons.

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Perseverance’s future increasingly rocky road

11:51 am

Perseverance's uphill route
Click for original image.

Though nothing in any image so far from the Mars rover Perseverance matches the rocky terrain that the rover Curiosity has been traversing for the past two years as it climbs Mount Sharp in Gale Crater, as Perseverance has been climbing up the rim of Jezero Crater in the past few weeks it is beginning to get a hint of a future rougher road.

The photo to the right, cropped, reduced, and sharpened to post here and taken on October 20, 2024 by one of the rover’s high resolution cameras, is a good example. It looks uphill in the direction that the rover will travel. Note how as you go higher the ground appears to be more strewn with rocks and boulders. Another image, taken the same day by the rover’s high resolution camera, shows a close-up of an even more boulder-covered landscape.
» Read more

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A galaxy squashed as it plows its way through the intergalactic medium

9:21 am

A galaxy squashed by a vacuum
Click for original image.

Time for another cool image on this relatively slow day in the space news business. The picture to the right, cropped, reduced, and sharpened to post here, was taken by the Hubble Space Telescope and released today by the European Space Agency’s press department. From the caption:

Appearances can be deceiving with objects so far from Earth — IC 3225 itself [the galaxy to the right] is about 100 million light-years away — but the galaxy’s location suggests some causes for this active scene, because IC 3225 is one of over 1300 members of the Virgo galaxy cluster. The density of galaxies in the Virgo cluster creates a rich field of hot gas between them, the so-called ‘intracluster medium’, while the cluster’s extreme mass has its galaxies careening around its centre in some very fast orbits. Ramming through the thick intracluster medium, especially close to the cluster’s centre, places an enormous ‘ram pressure’ on the moving galaxies that strips gas out of them as they go.

IC 3225 is not so close to the cluster core right now, but astronomers have deduced that it has undergone this ram pressure stripping in the past. The galaxy looks as though it’s been impacted by this: it is compressed on one side and there has been noticeably more star formation on this leading edge, while the opposite end is stretched out of shape. Being in such a crowded field, a close call with another galaxy could also have tugged on IC 3225 and created this shape. The sight of this distorted galaxy is a reminder of the incredible forces at work on astronomical scales, which can move and reshape even entire galaxies!

What makes the impact on this galaxy of that intercluster medium so astonishing is that medium is so relatively empty of material. The space between galaxies in the Virgo cluster is in all intents and purposes a vacuum far more empty than any that we can create in a chamber on Earth. And yet it was enough to distort this galaxy and cause star formation on the galaxy’s leading edge.

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Young lava on the Moon?

9:08 am

Young lava on the Moon?
Click for original image.

Cool image time! The photo to the right, cropped and reduced to post here, was taken on November 27, 2023 by Lunar Reconnaissance Orbiter (LRO) and was today featured by the science team. From their caption:

One of the early findings from the LRO mission was the discovery of volcanic features known as Irregular Mare Patches (IMPs) scattered across the nearside. These landforms are generally considered volcanic. However, their ages are hotly debated. They may be as young as 50 million years or as old as 3.5 billion years. The Aristarchus IMP (25.045°N, 313.233°E) is one of the smallest and most enigmatic IMP. The fact that this IMP is found within the Aristarchus crater ejecta suggests it formed after the crater, which is dated at 200 million years.

Alternatively, this IMP may have formed as part of ejecta emplacement from the Aristarchus crater forming impact. However, no other crater ejecta on the Moon exhibits a similar landform.

Astronomers for decades before and since Sputnick have reported what appears to be some activity in the Aristachus region, though none of those reports have ever been confirmed. In LRO’s long mission orbiting the Moon it has not yet detected any obvious changes there, suggesting that there is little or no present activity. These patches however appear to indicate activity in the relatively recent past.

The patches however also indicate activity that seems alien. Why would the lava form in this manner, as rough patch of knobs, sometimes aligned, sometimes not?

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Oman: 1st launch from Duqm spaceport by the end of the year

2:31 pm

Middle East, showing Oman's proposed spaceport

According to an announcement yesterday Oman plans to complete its first launch before the end of 2024 from its proposed new spaceport near the city of Duqm on the Indian coast.

The map to the right indicates its location. Oman has dubbed the spaceport Etlaq, and it is being run by what Oman claims is a private company, the National Aerospace Services Company (NASCOM), but based on what little I can find out, it appears either to be Oman’s space agency, or a variation of the pseudo-companies in China, privately run but very tightly controlled and owned by government officials.

The announcement provided no information about the rocket or launch, which I suspect will be nothing more than a relatively simple suborbital mission, designed to demonstrate they are serious about this spaceport. The news story at the link shows a picture of a very sophisticated rocket resembling India’s GSLV rocket. I think it is a AI image having nothing to do with reality.

This project was first announced in 2023, with more information released in January 2024. It hopes to attract American rocket companies by claiming it is being built to FAA standards.

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