ISS crew splashes down safely

SpaceX’s Endurance manned capsule yesterday safely splashed down in the Gulf of Mexico, bringing home a crew of four astronauts from ISS after completing a six month mission.

NASA astronaut Jasmin Moghbeli, ESA (European Space Agency) astronaut Andreas Mogensen, JAXA (Japan Aerospace Exploration Agency) astronaut Satoshi Furukawa, and Roscosmos cosmonaut Konstantin Borisov, returned to Earth splashing down at 5:47 a.m. EDT. Teams aboard SpaceX recovery vessels retrieved the spacecraft and its crew. After returning to shore, the crew will fly to NASA’s Johnson Space Center in Houston.

…Moghbeli, Mogensen, Furukawa, and Borisov traveled 84,434,094 miles during their mission, spent 197 days aboard the space station, and completed 3,184 orbits around Earth. The Crew-7 mission was the first spaceflight for Moghbeli and Borisov. Mogensen has logged 209 days in space over his two flights, and Furukawa has logged 366 days in space over his two flights.

This was the third flight of Endurance. As always, it is important to note that though the passengers were government employees from the U.S., Europe, Japan, and Russia, the entire splashdown crew and capsule were private employees of SpaceX. This was a private mission, purchased by those governments.

First manned Starliner mission slips to May

The first manned mission of Boeing’s Starliner capsule has now been delayed another few weeks, to early May, due to scheduling conflicts at ISS.

The delay was revealed as an aside in a NASA press release detailing the schedule of press briefings related to the mission. There appears to be no technical reasons for the delay. The quiet way NASA revealed it probably just indicates the agency’s embarrassment at Boeing’s overall problems with this spacecraft that have caused a four year delay in its first manned mission.

The flight will dock with ISS, last two weeks, and carry two astronauts, Butch Wilmore and Suni Williams. Its goal is to complete the final check out of Starliner prior to the initiation of operational missions. Once done, Boeing will not only begin to fly paid flights to ISS for NASA, it will be free to offer this capsule to others, including commercial tourists. Don’t expect customers to flock to buy seats, considering the many problems both Boeing and Starliner have had. Instead, it will likely take Boeing several years of NASA missions to reassure customers the spacecraft is reliable.

SpaceX successfully launches four NASA astronauts to ISS

SpaceX tonight successfully launched four NASA astronauts to ISS, its Falcon 9 lifting off from Cape Canaveral on the company’s eighth operational manned mission for NASA, and the thirteenth overall manned mission launched by SpaceX since May 2020.

The Dragon capsule, Endeavour, is flying its fifth manned flight. The first stage completed its first flight, landing back at Cape Canaveral. The crew is expected to dock with ISS on March 5, 2024. The crew is scheduled to fly a standard six month mission.

The leaders in the 2024 launch race:

20 SpaceX
10 China
3 Russia

American private enterprise now leads the entire world combined 23 to 19 in successful launches, while SpaceX now leads the rest of the world, excluding American companies 20 to 19.

Air leak in Russia’s half of ISS continues and has increased slightly

Zvezda module of ISS
The Zvezda module, with aft section indicated
where the cracks have been found.

The leak in the Russia half of ISS continues to bleed air from the space station and has even increased slightly in recent months, though both NASA and Roscosmos say the rate of loss is tiny and poses no danger to the station’s inhabitants.

“There is no threat to the crew or the station itself,” [Roscosmos] said in a statement carried by Russian news agencies. Roscosmos’ statement followed comments by Joel Montalbano, NASA’s station project manager, who noted Wednesday that the leak in the Russian segment has increased but emphasized that it remains small and poses no threat to the crew’s safety or vehicle operations.

As indicated by the graphic to the right, the air loss is suspected to come from stress fractures in the Zvezda module, the station’s second oldest and one in which many dockings have occurred over the past two decades. Russia had suspended dockings in this port shortly after the leaks and cracks were detected, but have apparently resumed those dockings recently. One wonders if this new activity is contributing to the increase in loss of air.

ULA begins stacking Atlas-5 rocket for launching the first manned mission of Starliner

ULA has begun to assemble the Atlas-5 rocket that will hopefully launch Boeing’s Starliner capsule on its first manned mission to ISS, presently targeting a late April lift-off.

The rocket’s main stage was transferred from the nearby Advanced Spaceflight Operations Center to the integration facility Wednesday, Feb. 21, where it will await integration with the rocket’s upper Centaur stage and Starliner. The spacecraft will carry NASA astronauts Suni Williams and Butch Wilmore to the orbiting laboratory for a short stay of about one to two weeks before returning to a landing site in the southwest United States.

The late April date appears to be a slight delay from previous announcements.

Vast to compete with Axiom for NASA’s limited slots for commercial manned missions to ISS

The private space station company Vast, the only one presently building its own space station without a NASA contract, has now announced that it intends to to compete with Axiom for the limited docking slots NASA has made available for commercial manned tourist missions to ISS.

During a panel discussion at the Federal Aviation Administration Commercial Space Transportation Conference Feb. 21, Max Haot, chief executive of Vast, said his company would bid on the fifth and sixth private astronaut missions, or PAMs, that NASA offers to companies seeking to flying commercial missions to the ISS. “From our point of view, it will make us a better space station builder, a better partner of NASA, and it will help us practice a lot of the disciplines we are building” for its future commercial stations, he said of Vast’s plan to bid on the missions.

Up until now, Axiom has had no competition for those limited docking opportunities, has flown two missions, with a third planned for this fall. All it needed to do is negotiate the rental fees with NASA for using ISS. Now NASA will need to open up bidding for those slots. Its job is not to play favorites, but to instead make its taxpayer-funded facilities available to as many private companies as possible. Whether it will do so is at present unclear.

Vast’s own space station, a single module to be launched on SpaceX’s Starship/Superheavy, dubbed Haven-1, is scheduled for launch next year according to Vast officials. If so (assuming SpaceX’s rocket is operational by then), Vast will be the first private space station in orbit, beating Axiom and the two consortiums building Orbital Reef and Starlab. And it will have done it without taxpayer money.

Russia launches Progress freighter to ISS

Russia today (February 15th in Kazakhstan) successfully used its Soyuz-2 rocket to launch a Progress freighter to ISS.

As happens on launches from Kazakstan to ISS, the rocket’s core stage and strap-on boosters crashed within Kazakstan inside planned crash zones.

This was supposed to be the third launch today, but SpaceX’s second launch today, this time of 22 Starlink satellites, was scrubbed due to weather and reschduled 24 hours till tomorrow at Vandenberg. There is still one more launch scheduled today, SpaceX launching Intuitive Machines Nova-C lunar lander at 9:57 pm (Pacific).

The leaders in the 2024 launch race:

13 SpaceX
8 China
2 Iran
2 Russia

American private enterprise still leads the entire world combined 15 to 14 in successful launches, with SpaceX by itself now trailing the rest of the world combined (excluding American companies) 13 to 14.

Axiom commercial manned mission to ISS splashes down safely

The four astronauts on Axiom’s third commercial manned mission to ISS successfully splashed down safely today in the Atlantic off the coast of Florida, with SpaceX recovery crews quickly picking them and the capsule Freedom up from the water.

The crew, made up of three European passengers and one Axiom employee, spent 21 days in space, about 17 on ISS. Axiom sold the tickets, and then purchased the ride from SpaceX and the time on ISS from NASA.

Vibration testing of Sierra Space’s Tenacity mini-shuttle completed

NASA engineers have now completed vibration testing of Sierra Space’s Tenacity mini-shuttle, set to launch on a Vulcan rocket later this year.

Reading between the blather in the NASA press release at the link, it appears that testing was successful, proving that the Dream Chaser spacecraft can survive the vibrations of launch. This conclusion by me however remains unconfirmed. Engineers are now preparing the mini-shuttle for environmental testing.

Next up, Dream Chaser will move to a huge, in-ground vacuum chamber that will continue to simulate the space environment Dream Chaser will encounter on its mission. The spaceplane will be put through its paces, experiencing low ambient pressures, low-background temperatures, and dynamic solar heating.

Previously the launch date had been targeting April 2024, according to ULA officials. It now appears, from the vagueness of recent reports, as well as the actual testing now in progress, that the launch date has slipped. They appear to be targeting the first half of 2024, but are as yet unwilling to commit to a date.

Freedom capsule undocks from ISS with AX-3 commercial crew

SpaceX’s Freedom capsule today undocked from ISS at 9:20 am (Eastern), carrying three European passengers and one commander, with a planned splashdown in the Atlantic off the coast of Florida at 8:30 am (Eastern) on February 9, 2024.

Ax-3 astronauts Michael López-Alegría, Walter Villadei, Marcus Wandt, and Alper Gezeravci will complete 18 days aboard the orbiting laboratory at the conclusion of their mission. The SpaceX Dragon will return to Earth with more than 550 pounds of science and supplies, including NASA experiments and hardware.

Live stream for that splashdown can be found here. The mission is a private one. Axiom sold the tickets, and purchased from SpaceX the Falcon 9 launch and use of its Freedom capsule. It also rented time on ISS from NASA for its crew and passengers.

Weather stops everything by SpaceX in the last 24 hours

SpaceX found itself stymied in the past 24 hours due to poor weather conditions on both coasts, with two launches and the return of a Dragon capsule from space all scrubbed.

First a Falcon 9 launch from Vandenberg of 22 Starlink satellites was scrubbed, the launch pushed back from yesterday to tonight at 5.39 pm (Pacific).

Then a launch of a NASA climate satellite on a Falcon 9 rocket from Cape Canaveral was scrubbed shortly thereafter, the launch rescheduled for 1:33 am (Eastern) tonight.

Finally, the return of Axiom’s Ax-3 commercial passenger flight to ISS was scrubbed today because of poor weather conditions.

NASA, Axiom Space, and SpaceX are standing down from the Tuesday, Feb. 6, undocking opportunity of Axiom Mission 3 from the International Space Station. Mission teams will continue to review weather conditions off the coast of Florida, which currently are not favorable for return, and set a new target opportunity for space station departure and splashdown of the Dragon spacecraft and Axiom crew members.

The undocking is now tentatively set for tomorrow morning, but this remains unconfirmed. The three passengers and the Axiom commander have so far spent 18 days in orbit. The original plan was for a 14 day mission, most of which to be spent on ISS, but weather can always extend such plans.

The launch scrubs illustrate the challenge SpaceX faces in reaching its stated goal of 150 launches in 2024. It appears the company is now capable of technically meeting that goal. To do it however it needs to launch almost every other day, and weather simply might not allow a pace like this during some parts of the year in both Florida and California. Whether the company can make-up for these delays with multiple daily launches at other times remains unknown. If it does, it will be another feather in the cap for SpaceX.

SpaceX launches Northrop Grumman’s Cygnus capsule to ISS

SpaceX today for the first time launched a Northrop Grumman Cygnus cargo freighter to ISS, its Falcon 9 rocket lifting off from Cape Canaveral.

The first stage completed its 10th flight, landing back at Cape Canaveral. Cygnus will rendezvous with ISS in two days, where it will be berthed to the station using a robot arm. It will then stay docked for six months as astronauts unload about 8,200 pounds of cargo.

SpaceX was used as a launch provider because Northrop Grumman’s own rocket Antares is presently unavailable because the engines for the first stage as well as the stage itself were previously built by Russia and the Ukraine respectively, both of which the company cannot no longer buy due to the Ukraine War. SpaceX has a contract for three flights, with today’s launch the first. Firefly has a contract from Northrop Grumman to built a new first stage for Antares, with a first launch targeting mid-2025.

The launch was SpaceX’s 10th in January. With a goal of 150 launches in 2024, this puts the company slightly behind the pace required to meet that goal.

The 2024 launch race:

10 SpaceX
6 China
2 Iran
1 India
1 ULA
1 Japan

Starliner launch in mid-April continues on target

In an update today from NASA, it appears the first manned flight of Boeing’s manned Starliner capsule remains on target for a mid-April launch on a ULA Atlas-5 rocket.

Engineers continue to analyze the data from the recent parachute drop test that appeared to prove out the redesign of the capsule’s parachutes. Also, the work to replace or mitigate the flammable tape in the capsule has been completed.

Boeing completed removal of P213 tape that may have posed a flammability risk in certain environmental conditions. Boeing removed more than 17 pounds, or roughly 4,300 feet, of the material from the Starliner crew module. For areas in which removal of the tape carried an increased risk to Starliner hardware, Boeing applied tested remediation techniques such as overwrapping the P213 tape with another non-flammable, chafe-resistant tape, and installing fire breaks on wire harnesses.

No explanation as yet has been released as to how it was even possible for Boeing to have used this tape, considering it has been common practice since the Apollo 1 fire in 1967 to avoid the use of flammable materials in spacecraft. Nor has any explanation been issued on how the weak link in the main parachute connection to the capsule was not discovered until only weeks before the manned flight, last summer.

Nonetheless, both issues appear solved. After years of delays and innumerable problems, Boeing might finally be ready to fly Starliner with passengers. It desperately needs this flight to be successful, especially considering the company’s other ongoing problems with its 737 airplane. It also will not receive the rest of its contract payments from NASA until this flight is a success, and the delays and problems have cost the company more than $1.5 billion. The contract was fixed price, so Boeing has had to pay for all the additional costs from its own pocket.

SpaceX successfully launches four astronauts to ISS on Axiom private mission

They’re coming for you next: SpaceX today successfully launched three European astronauts (plus the company capsule commander) to ISS on an Axiom private mission, its Falcon 9 rocket lifting off from Cape Canaveral at 4:49 pm (Eastern).

The capsule, Freedom, is flying humans into space for its third time. The first stage successfully completed its fourth flight, landing back at Cape Canaveral.

The mission itself is private, but the customer is the European Space Agency, which has paid the company Axiom to bring its astronauts to ISS for a fourteen day mission. Axiom in turn hired SpaceX to provide the rocket and capsule. This flight is confirmation that Europe has accepted the concept of capitalism in space, whereby it no longer depends on governments to accomplish what it wants, but instead is a customer buying those products from the private sector.

The astronauts are expected to dock with ISS early tomorrow morning.

The 2024 launch race:

6 SpaceX
5 China
1 India
1 ULA
1 Japan

Next manned mission to ISS to launch tomorrow

The next manned mission to ISS, a private mission by the company Axiom carrying three European astronauts and commanded by an Axiom astronaut, is presently scheduled to launch tomorrow, January 18, 2024, at 4:49 pm (Eastern).

This is a private mission by Axiom, launched on SpaceX’s Falcon 9 and flying the astronauts in its Freedom Dragon manned capsule. This will be Freedom’s third flight to ISS. The launch was originally scheduled for today, but SpaceX scrubbed the mission today in order to give it “additional time allows teams to complete pre-launch checkouts and data analysis on the vehicle.” It appears during normal prelaunch checkouts engineers found the joints between the upper stage and the capsule were not tightened the proper amount. The company decided to replace the joints, which caused this one day delay.

The crew will spend up to fourteen days at ISS.

I have embedded a live stream of the launch below.
» Read more

Russia and NASA agree to extend ISS astronaut exchanges on each other’s spacecraft through 2025

Russia and NASA have agreed to extend their barter deal through 2025, whereby each nation sends astronauts to ISS periodically on the other nation’s rockets and capsules.

This is a barter deal, with no exchange of money. The fundamental idea is to make sure astronauts on board ISS understand how the capsules from each nation operate in case of emergency. Russia had initially resisted signing such a deal after SpaceX began providing NASA its Dragon capsules and Falcon 9 rocket to get astronauts to ISS. It said this was because it did not trust SpaceX’s technology, but I suspect Roscosmos was also hoping to squeeze some cash from NASA as it was no longer being paid to fly U.S. astronauts on its Soyuz rocket and capsule. That attempt was futile. For numerous political reasons there was no way NASA was going to pay Russia anything in this barter deal.

Russia then signed on, and will keep extending this agreement until the day ISS is retired, or it finally launches its own station (something that is becoming increasingly unlikely).

NASA: The flight plan for Dream Chaser Tenacity’s first demo mission to ISS

NASA today provided a detailed description of the flight plan for the first demo ISS mission of Sierra Space’s first Dream Chaser reuseable mini-shuttle, dubbed Tenacity, now targeting some unspecified date in 2024.

It will carefully approach ISS, testing its maneuvering and rendezvous capibilities, and then be grabbed by the station’s robot arm to be berthed to the station.

On its first flight to the International Space Station, Dream Chaser is scheduled to deliver over 7,800 pounds of cargo. On future missions, Dream Chaser is being designed to stay attached to the station for up to 75 days and deliver as much as 11,500 pounds of cargo. Cargo can be loaded onto the spacecraft as late as 24 hours prior to launch. Dream Chaser can return over 3,500 pounds of cargo and experiment samples to Earth, while over 8,700 pounds of trash can be disposed of during reentry using its cargo module.

On this first demo flight it will remain docked for 45 days, and then land on the shuttle runway at Cape Canaveral.

NASA to allow bidders on de-orbiting ISS to work under cost-plus contracts

In a major change of recent policy trends, NASA has decided to allow any bidders on the project to deorbit ISS to have the choice of working under either a fixed-price or a cost-plus contract.

In a procurement notice posted Dec. 5, NASA announced it would allow companies the choice of using either firm fixed price or cost plus incentive fee contract structures for both the design and the production of the U.S. Deorbit Vehicle (USDV).

When NASA issued the original request for proposals (RFP) for the vehicle in September, the agency gave bidders a choice. They could propose to develop the vehicle using a cost-plus contract and then produce it under a fixed-price contract, a so-called “hybrid” approach. Alternatively, they could propose doing both development and production under fixed-price contracts.

The revised approach now adds an option to perform both the development and the production under cost-plus contracts. NASA, in both the procurement notice and a blog post, did not disclose the reason for the change.

In recent years NASA had been shifting more and more to fixed-price contracts, because it works. It either forces discipline on companies, making them get the job done at cost and on time, or it reveals that the company is incompetent (as in the case of Boeing and its Starliner capsule), valuable information for future bidding.

I suspect that Boeing’s recent decision to refuse to sign any fixed-price contracts played a hand in this decision. For the last decade or so there have been many government officials who like to treat Boeing as their best friend, despite its recent failures. By doing so they increase the chances the company will hire them as consultants when they retire from their government job. Also, politicians tend to bow to this big company due to its large footprint in many congressional districts.

The result is this shift back to cost-plus. This will also mean that this project will likely go overbudget and behind schedule, as such contracts routinely do. The winning bidder will have no incentive to rein in costs. In fact, the nature of the contract will encourage just the opposite, as any cost overruns will be picked up by the government.

The big 25th anniversary of ISS is really still two years away

The first crew of ISS, from left to right, Yuri Gidzenko, Sergei Krikalev, Bill Shepherd
The first crew of ISS, from left to right,
Yuri Gidzenko, Sergei Krikalev, Bill Shepherd

In a press release today NASA touted the 25th anniversary of the mating in orbit of the first two modules of the International Space Station (ISS), Zarya (built by Russia but paid for by the U.S.) and Unity (built by Boeing for NASA).

25 years ago today, the first two modules of the International Space Station – Zarya and Unity – were mated during the STS-88 mission of space shuttle Endeavour. The shuttle’s Canadarm robotic arm reached out and grappled Zarya, which had been on orbit just over two weeks, and attached it to the Unity module stowed inside Endeavour’s payload bay. Endeavour would undock from the young dual-module station one week later beginning the space station assembly era.

Though this anniversary is nice, it really isn’t the most significant. The most significant ISS anniversary is still two years away, when we celebrate 25 years of continuous human presence in space. That record began on October 31, 2000, when a Soyuz-2 rocket lifted off from Baikonur in Kazahkstan, carrying American Bill Shepherd and Russians Yuri Gidzenko and Sergei Krikalev on what was to be the first crew occupancy of the station. Since that launch humans have occupied ISS without break.

With the present operation of China’s space station, and about four American commercial stations under development as well as plans by India and Russia to build their own, it is very likely that October 30, 2000 will remain the last day in human history where no human was in space.

That is the significant date. That is the moment in history that should be noted and marked as significant.

Russia launches Progress to ISS

Russia early this morning successfully launched a Progress freighter to ISS, its Soyuz-2 rocket lifting off from Baikonur in Kazakhstan.

The rocket’s core stage, strap-on boosters, and second stage crashed in the standard drop zones the Russians have used since the launch of Sputnik in 1957. It is unclear how close to inhabited areas any of these are.

The leaders in the 2023 launch race:

87 SpaceX
53 China
16 Russia
7 Rocket Lab
7 India

American private enterprise still leads China in successful launches, 99 to 53, and the entire world combined 99 to 85. SpaceX by itself still leads the entire world (excluding other American companies) 87 to 85.

SpaceX however has two launches scheduled for today, one at Vandenberg at 10:04 am (Pacific) and the second at Cape Canaveral at 11 pm (Eastern). The links go to the live streams.

NASA to fly Indian astronaut to ISS next year

During meetings in India between NASA and ISRO officials, instigated by administrator Bill Nelson’s visit this week, the mission details for the flight of an Indian astronaut to ISS in 2024 are now being worked out.

A Nasa delegation led by Nelson held a meeting with minister of state for science & technology Jitendra Singh on Tuesday. “I had a discussion with the minister on what the Indian astronaut would do on the space station. And the two of us talked about the fact that things that are important to India in scientific research, the Indian astronaut ought to have that as a choice to do. If there is a particular part of research that he or she would be interested in, then I want to encourage that,” Nelson later said at a media interaction. “Nasa will help train the Indian astronaut to fly to ISS by end of 2024. Those details are being worked out. Indian Space Research Organisation (Isro) will announce that,” Nelson said.

Though this plan for NASA to fly Indian astronaut to ISS next year was first announced in June, it was overshadowed by India’s decision at that time to sign the Artemis Accords.

It is also important to recognize that the real arrangements are all being done by others, that Nelson and the India government officials are merely there to get their faces on television.

If this flight happens as planned, next year could be very exciting for India’s manned space program, since it also hopes to fly its own manned mission at that time.

Scientists: More evidence cosmic rays come from nearby supernova remnants

The uncertainty of science: According to high energy data from an instrument on ISS, astronomers found more evidence that the cosmic rays that enter our solar system likely come from nearby supernova remnants.

Current theory posits that the aftermath of supernovae (exploding stars), called supernova remnants, produce these high energy electrons, which are a specific type of cosmic ray. Electrons lose energy very quickly after leaving their source, so the rare electrons arriving at CALET with high energy are believed to originate in supernova remnants that are relatively nearby (on a cosmic scale), Cannady explains.

The study’s results are “a strong indicator that the paradigm that we have for understanding these high-energy electrons—that they come from supernova remnants and that they are accelerated the way that we think they are—is correct,” Cannady says. The findings “give insight into what’s going on in these supernova remnants, and offer a way to understand the galaxy and these sources in the galaxy better.”

The results however do not prove this. Nor do they eliminate the possibility that cosmic rays might also come from other sources outside our galaxy. At present the data is simply too uncertain.

SpaceX successfully launches a cargo Dragon to ISS

Using a Falcon 9 rocket lifting off from Cape Canaveral, SpaceX tonight successfully launched a cargo Dragon carrying supplies to ISS.

This Dragon capsule is making its second flight. The first stage also completed its second flight, landing back at Cape Canaveral. The capsule itself will dock with ISS early Saturday morning.

The leaders in the 2023 launch race:

81 SpaceX
51 China
14 Russia
7 Rocket Lab
7 India

American private enterprise now leads China 93 to 51 in successful launches, and the entire world combined 93 to 80. SpaceX by itself is once again leading the rest of the world (excluding American companies) 81 to 80.

Sierra Space: Tenacity is complete and ready for ground testing

Sierra Space announced yesterday that its reuseable Tenacity cargo freighter, the first of its Dream Chaser mini-shuttles, is now complete and ready shipment to NASA’s test facilities in Ohio for ground testing.

The spacecraft hopefully will fly next year. Though this is four years behind schedule, it signals an important milestone for the company, and suggests its operational pace will pick up afterward. Though its arrival comes very late in ISS’s lifespan, the coming arrival of many private space stations, including Sierra’s own, will likely provide it many customers.

Two mouse embryos successfully grown on ISS

Mouse embryos from experiment
Taken from figure 2 of the paper

In a paper just published, scientists reveal that in 2021 they successfully grew two mouse embryos in weightlessness on ISS, suggesting that “perhaps mammalian space reproduction is possible, although it may be somewhat affected,” as they note in the conclusion of their paper [pdf].

From the papers abstract:

The embryos cultured under microgravity conditions developed into blastocysts with normal cell numbers, ICM, trophectoderm, and gene expression profiles similar to those cultured under artificial-1 g control on the International Space Station and ground-1 g control, which clearly demonstrated that gravity had no significant effect on the blastocyst formation and initial differentiation of mammalian embryos.

The images to the right come from the paper’s second figure, and compare the blastocysts from a ground control (top), an 1g artificial sample on ISS (middle), and the weightless result (bottom).

The experiment has many uncertainties, with the low number of embryos tested the most important. Quoting the paper’s conclusion again, the possibilities of refining this experiment for better results are great:

Unfortunately, the number of blastocysts obtained from the ISS experiment was not abundant; and we have not been able to confirm the impact on offspring because we have not produced offspring from embryos developed in space. We believe that the ETC [the experiment itself] will allow blastocysts to be frozen on the ISS if a cryoprotectant is used in place of PFA [a solution of formaldehyde]. Then, the frozen blastocysts could be brought back to Earth for transfer to a female recipient, and the viability of the blastocysts could be evaluated. Moreover, we could design a device to launch frozen oocytes and spermatozoa to the ISS, where in vitro fertilization experiments could be performed in microgravity. The use of this approach would be cheaper. Furthermore, the study of mammalian reproduction in space is essential to start the space age, making it necessary to study and clarify the effect of space environment before the ISS is no longer operational.

Despite the uncertainties, these results are significant. They suggest that human reproduction in zero gravity is possible, which also suggests it will be even more possible in lower gravity environments like the Moon or Mars.

Russian astronauts locate coolant leak on spacewalk

Coolant leak on Nauka radiator

In an almost eight hour spacewalk yesterday, two Russian astronauts were able to locate the source of the coolant leak on a radiator unit connected to the new Nauka module on the Russian half of ISS.

The image to the right, a screen capture from the live stream, shows the leak location, where a small white droplet sits on one of the coolant lines that connect two radiator panels. You can also see darkening on the tubes to either side, likely also caused by the leaking ammonia. To locate it ground controllers opened valves to let coolant into the line while the astronauts watched for changes, and were able to see the coolant come out of this spot.

One astronaut also noted the following during the inspection:

[B]efore noticing the growing deposit of liquid coolant, Kononenko reported seeing a myriad of small holes on the surface of the radiator’s panels. “The holes have very even edges, like they’ve been drilled through,” Kononenko radioed to the flight controllers working in Moscow Mission Control. “There are lots of them. They are spread in a chaotic manner.”

In the past year similar coolant leaks have occurred on both a Progress freighter and a Soyuz manned capsule, with the leak location in almost the exact same spot, suggesting an intentional cause, not a random micrometeorite hit. This coolant leak in Nauka is on equipment that was launched to ISS in 2010. If it was also drilled, whoever did it did so a long time ago, which implies Russia has a long standing saboteur within its operations.

This conclusion however remains wild speculation. In the dozen-plus years since launch, this radiator has been stored on the outside of ISS, where it could easily have been hit by micrometeorites that would cause those holes and this leak.

The plan is to consider some repair operation on future spacewalks. In the 1980s the Russians did something similar, with astronauts doing six spacewalks to replace a section of fuel line that was leaking on its Salyut-7 station. They cut open its hull and installed a second section of line so that the valves could remove leaking section from operations.

The hull of Axiom’s first space station module nears completion

The hull of Axiom’s first space station module is nearing completion, according to officials of the Italian company Thales Alenia Space that is building it.

“The first module shell is effectively completed,” Jason Aspiotis, Axiom’s director of in-space infrastructure and logistics, said at AIAA’s Ascend conference here on Oct. 23. “A lot of the subsystems that will populate the underlying structure–think about life support systems, avionics, propulsion, [guidance, navigation and control systems], power, communications, all that good stuff–we’re developing in a lab in Houston.” Hab One hatches have also been fabricated, tested and prepared for delivery to Thales Alenia Space to support Hab One pressure testing, the company says.

The first module is to be shipped to Houston by 2024 for final assembly and integration at Axiom Space’s factory at Ellington Airport. The company plans to launch the Hab One module in 2026.

Based on this news report, Axiom’s schedule has not experienced any further delays since it pushed back the launch from 2024 in June.

The article also says, almost as an aside, that ISS is planned for decommission “in 2031”, which is one year later than any previous report I’ve seen. I suspect this is correct, but is information that NASA really didn’t want revealed to the public as yet, as it had enough trouble convincing its international European and Japanese partners to stay on until 2030. Moreover, there remains serious concerns the older Russian modules themselves might fail before then, based on the number of stress fractures found in their hulls, so admitting NASA hopes to keep the station flying till ’31 will appear questionable at best.

Axiom signs deal with the United Kingdom to fly all British mission

The space agency of the United Kingdom today announced that it has signed a deal with Axiom to fly an manned mission in space, with four astronauts spending up to two weeks in space (likely in a SpaceX Dragon capsule).

The flight, estimated to cost around £200 million, is being organized in cooperation with the European Space Agency (ESA), though all the astronauts will be British. The announced commander, Tim Peake, spent six months on ISS in 2015, and has come out of retirement to do the flight.

It is also unclear at this moment whether it will fly to ISS, or simply remain in orbit. In fact, few specific details have yet been released.

The bottom line however is that the new American space industry is going to make money from Britain’s desire to be a space power. Seems like a good deal to me.

ISS Russians to do spacewalk on October 25 to investigate Nauka coolant leak

Due to the coolant leak that appeared in a back up outside radiator connected to Russia’s Nauka module, NASA and Russia have rearranged their upcoming spacewalk schedule, with two American spacewalks now delayed until after a Russian spacewalk on October 25 that will investigate the leak.

During that spacewalk, [Oleg] Kononenko and [Nikolai] Chub will install a synthetic radar communications system on the Russian segment of the orbiting laboratory and deploy a nanosatellite to test solar sail technology. In addition, they plan to inspect and photograph the backup radiator that leaked on the Nauka multipurpose laboratory module.

The leak itself has stopped, though neither NASA nor Roscosmos have explained why. The leaked material is considered non-toxic, but there appears to be a concern it might get into some “internal systems” and cause problems.

NASA delays two ISS spacewalks as Russian engineers assess now stopped leak on Nauka module

NASA yesterday confirmed it is delaying by at least one week two ISS spacewalks in order to allow more time for Russian engineers to analyze the causes of the coolant leak on Nauka module and assess its short and long term consequences for the station.

The spacewalks were deferred from their original target dates to allow engineers additional time to complete their analysis of the coolant leak, which occurred on Oct. 9 and has now stopped. [emphasis mine]

The highlighted words are the most important takeaway. The leak has stopped leaking, though we have not been told why. The Russians might have closed off the leaking radiator from the system, or maybe the leak stopped on its own for unknown reasons. More information is clearly required.

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