Crew Works Ongoing Spacewalk Preps and Advanced Space Research

Astronauts (from left) Stephen Bowen and Sultan Alneyadi try on and test out the their spacesuits ahead of a spacewalk planned for Friday, April 28.
Astronauts (from left) Stephen Bowen and Sultan Alneyadi try on and test out the their spacesuits ahead of a spacewalk planned for Friday, April 28.

As spacewalk preparations are under way aboard the International Space Station, the Expedition 69 crew is continuing its advanced microgravity research while maintaining orbital lab systems.

Two astronauts are readying their tools today for a six-and-a-half hour spacewalk planned to start at 9:15 a.m. EDT on Friday. NASA Flight Engineer Stephen Bowen will be going on his eighth career spacewalk with first-time spacewalker and astronaut Sultan Alneyadi from UAE (United Arab Emirates). The duo will work in the vacuum of space on the starboard side of the station’s truss structure routing power cables and retrieving a communications antenna. The cable work is being done in advance of the installation of the station’s fourth roll-out solar array. The iROSA, or International Space Station Roll-Out Solar Array, is due to be delivered on the next SpaceX Dragon cargo mission.

After the morning tool work, Bowen and Alneyadi had a standard pre-spacewalk health checkup measuring each other’s heart rate, blood pressure, and temperature. The pair then split up for science work in the afternoon, as Bowen first swapped samples inside a fluorescence microscope then reconfigured a biology research incubator that generates artificial gravity. Alneyadi collected air samples from the Destiny and Columbus laboratory modules for analysis before cleaning the Veggie space botany facility.

NASA Flight Engineers Frank Rubio and Woody Hoburg also had their hands full on Wednesday conducting science operations and ensuring the upkeep of the orbital outpost. Rubio started his day servicing protein crystal samples for a biochemistry study then tested his proficiency as an operator of the Canadarm2 robotic arm on a computer. Hoburg serviced orbital plumbing and oxygen generator components throughout the day and finally installed a new radiation-sensing telescope in the Tranquility module.

In the Roscosmos side of the space station, the crew’s three cosmonauts were back to work following an off-duty day on Tuesday. Commander Sergey Prokopyev and Flight Engineer Dmitri Petelin began Wednesday training for an unlikely emergency scenario of evacuating the station inside the Soyuz MS-23 crew ship. Prokopyev then studied futuristic planetary piloting techniques while Petelin worked on the Nauka science module’s ventilation system. Flight Engineer Andrey Fedyaev spent his day repairing plumbing gear and replacing dust filters.


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Spacewalk Preps and Science Cleaning Aboard Station on Tuesday

Expedition 69 Flight Engineers (from left) Stephen Bowen and Sultan Alneyadi prepare their spacesuits for an upcoming spacewalk to continue station power upgrades.
Expedition 69 Flight Engineers (from left) Stephen Bowen and Sultan Alneyadi prepare their spacesuits for an upcoming spacewalk to continue station power upgrades.

Four Expedition 69 astronauts aboard the International Space Station worked throughout Tuesday preparing for a spacewalk and cleaning space biology hardware. Meanwhile, the orbiting lab’s three cosmonauts had an off-duty day following several days of their own spacewalk preparations.

Flight Engineers Stephen Bowen of NASA and Sultan Alneyadi of UAE (United Arab Emirates) spent Tuesday configuring their Extravehicular Mobility Units, or spacesuits, to get ready for a spacewalk set for 9:15 a.m. EDT on Friday. The duo also organized their spacewalking tools and inspected the tethers that will keep the spacewalkers safely attached to the station. The pair were joined in the afternoon by NASA Flight Engineers Woody Hoburg and Frank Rubio reviewing spacewalk procedures with mission controllers on the ground. The two spacewalkers will spend about six-and-a-half hours in the vacuum of space continuing the process of upgrading the station’s power generation system.

Hoburg and Rubio began their day deactivating and cleaning space biology hardware inside the Kibo laboratory module. The pair disconnected power cables and wiped down the Cell Biology Experiment Facility, a research incubator that housed samples that have since returned to Earth for analysis aboard the SpaceX Dragon cargo craft.

Three cosmonauts are relaxing today after a busy period getting ready for a spacewalk that was originally planned for Tuesday. Roscosmos mission controllers opted to postpone the spacewalk for a few more days and continue studying the procedures necessary to move an experiment airlock from the Rassvet module to the Nauka science module. Commander Sergey Prokopyev and Flight Engineer Dmitri Petelin will exit the Poisk airlock in their Orlan spacesuits to perform the logistics spacewalk. Flight Engineer Andrey Fedyaev will assist the spacewalkers from inside the station and operate the European robotic arm with the experiment airlock in its grip.


Learn more about station activities by following the space station blog@space_station and @ISS_Research on Twitter, as well as the ISS Facebook and ISS Instagram accounts.

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Astronauts Gearing Up for Friday Spacewalk

Astronaut Stephen Bowen is pictured waving during the seventh spacewalk of his career on March 2, 2011.
Astronaut Stephen Bowen is pictured waving during the seventh spacewalk of his career on March 2, 2011.

Two astronauts on the Expedition 69 crew are gearing up for a spacewalk at the end of the week. Meanwhile, two cosmonauts are standing down after their spacewalk planned for Tuesday was postponed.

Flight Engineers Stephen Bowen of NASA and Sultan Alneyadi of UAE (United Arab Emirates) are preparing for a spacewalk scheduled for 9:15 a.m. EDT on Friday. The duo in their Extravehicular Mobility Units, or spacesuits, will spend about six-and-a-half hours in the vacuum of space continuing to upgrade the orbital outpost’s power generation system. International Space Station managers will appear on NASA TV, on the agency’s app and website, at 2 p.m. today to discuss Friday’s spacewalk.

The two astronauts spent the day checking their spacesuits for leaks and proper fit verification with assistance from NASA Flight Engineer Woody Hoburg. Hoburg, along with NASA Flight Engineer Frank Rubio, will assist the astronauts in and out of their spacesuits and monitor their spacewalk. Alneyadi also wore a set of virtual reality goggles and trained for a variety of unlikely spacewalking rescue scenarios.

Meanwhile, another spacewalk that was planned for Tuesday has been postponed until early May. Commander Sergey Prokopyev and Flight Engineer Dmitri Petelin , with assistance from European robotic arm operator and Flight Engineer Andrey Fedyaev, were due to move an experiment airlock from the Rassvet module to the Nauka science module. That work has been pushed back several days while ground controllers study the procedures planned for the spacewalk.


Learn more about station activities by following the space station blog@space_station and @ISS_Research on Twitter, as well as the ISS Facebook and ISS Instagram accounts.

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Crew Works New Fluid Physics Study, Preps Cargo Ship for Departure

The Cygnus cargo craft is pictured moments after being captured with the Canadarm2 robotic arm controlled by NASA astronaut Nicole Mann. Credit: NASA TV
The Cygnus cargo craft is pictured moments after being captured with the Canadarm2 robotic arm on Nov. 9, 2022. Credit: NASA TV

Fluid physics research and cargo craft departure activities kept the Expedition 69 astronauts busy aboard the International Space Station on Thursday. The cosmonauts were also back to work following an extended sleep period after they completed a spacewalk to move and install hardware on the orbital outpost.

All four astronauts worked throughout the day on a new technology study demonstrating the potential of using a liquid-based carbon dioxide removal system in space. UAE (United Arab Emirates) Flight Engineer Sultan Alneyadi kicked off the experiment Thursday morning setting up hardware and performing a test run to verify liquid flows. Next, NASA Flight Engineers Stephen Bowen and Woody Hoburg performed a variety of experiment runs observing different ways to control liquids in weightlessness. Finally, NASA Flight Engineer Frank Rubio took over the experiment and performed the last flow observation of the day before powering off the research hardware.

During the mid-afternoon after completing their fluid research activities, Alneyadi and Hoburg partnered together configuring the Northrop Grumman Cygnus space freighter for its departure. Bowen started the closeout work on Thursday morning depressurizing the vestibule between Cygnus and the station’s Unity module. Ground controllers will command the Canadarm2 robotic arm to detach Cygnus from Unity and release it at 7:20 a.m. EDT on Friday after five-and-a-half months at the station. Alneyadi will be on duty monitoring the U.S. cargo craft’s departure. Cygnus will then reenter Earth’s atmosphere above the Pacific Ocean for a fiery, but safe demise.

The next spacewalk is set for Tuesday, April 25, at 5:40 p.m. when Roscosmos Commander Sergey Prokopyev and Flight Engineer Dmitri Petelin will once again exit the Poisk airlock in their Orlan spacesuits. The duo will spend about six hours moving an experiment airlock from the Rassvet module then installing it on the Nauka science module. Flight Engineer Andrey Fedyaev will also be back on duty during the spacewalk operating the European robotic arm from inside the station and maneuvering the experiment airlock.


Learn more about station activities by following the space station blog@space_station and @ISS_Research on Twitter, as well as the ISS Facebook and ISS Instagram accounts.

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Eye and Brain Study, Fluid Physics Research After Cosmonaut Spacewalk

Cosmonaut Sergey Prokopyev's helmet camera captures Earth views and cosmonaut Dmitri Petelin at work during the April 18 Russian spacewalk to install a radiator on the Nauka science module. Credit: NASA TV
Cosmonaut Sergey Prokopyev’s helmet camera captures Earth views and cosmonaut Dmitri Petelin at work during the April 18 Russian spacewalk to install a radiator on the Nauka science module. Credit: NASA TV.

Human research and fluid physics were the main science experiments taking place aboard the International Space Station on Wednesday for four Expedition 69 astronauts. The three cosmonauts aboard the orbital outpost slept in following an overnight spacewalk to move and install hardware.

The latest space biology experiment taking place on the station explores how living long-term in weightlessness affects an astronaut’s eyes and brain. The lack of gravity causes blood and cerebrospinal fluid to shift toward the head creating ocular and cranial pressure. NASA astronauts Stephen Bowen and Woody Hoburg studied that phenomena Wednesday morning and ways to offset the space-caused symptoms by collecting their blood pressure measurements and scanning their chests with the Ultrasound 2 device for the ISAFE investigation.

Afterward, Bowen peered at biological samples inside the Confocal Microscope testing its operations using fluorescence imaging techniques. Hoburg joined UAE (United Arab Emirates) Flight Engineer Sultan Alneyadi setting up hardware to kick off the CapiSorb Visible Systems fluid physics study. That experiment investigates the potential of using a liquid-based carbon dioxide removal system to promote more efficient space-based solutions and advanced Earth-bound applications.

The three astronauts, together with NASA Flight Engineer Frank Rubio, also spent a portion of Wednesday afternoon reviewing procedures and practicing robotic maneuvers for a spacewalk planned for April 28. Bowen and Alneyadi are scheduled to spend about six-and-a-half hours in the vacuum of space upgrading the orbital outpost’s power generation system. Space station managers will discuss the upcoming spacewalk live on NASA TV’s app and the agency’s website at 2 p.m. EDT on Monday.

The third spacewalk of the year was completed overnight after Commander Sergey Prokopyev and Flight Engineer Dmitri Petelin installed a radiator on the Nauka science module. The duo wrapped up the seven-hour and 55-minute logistics spacewalk at 5:35 a.m. on Wednesday, with assistance from Roscosmos Flight Engineer Andrey Fedyaev who operated the European robotic arm (ERA) with the radiator in its grip.

The trio from Roscosmos will have a long sleep period before returning to a normal shift on Thursday. Prokopyev and Petelin will then spend the day cleaning their Orlan spacesuits and stowing their spacewalking tools in the Poisk module. Fedyaev will return the ERA to its stowage position on Nauka then power it down.


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Cosmonauts Move Roscosmos Radiator and Complete Spacewalk

Cosmonauts Sergey Prokopyev and Dmitri Petelin work outside the space station during a spacewalk today to move a radiator from the Rassvet module to the Nauka module. Credit: NASA TV
Cosmonauts Sergey Prokopyev and Dmitri Petelin work outside the space station during a spacewalk today to move a radiator from the Rassvet module to the Nauka module. Credit: NASA TV

Roscosmos cosmonauts Sergey Prokopyev and Dmitri Petelin concluded their spacewalk on Tuesday, April 19, at 5:35 a.m. EDT after seven hours and 55 minutes.

Prokopyev and Petelin completed their major objectives, which included relocating a radiator from the Rassvet module to the Nauka science module with assistance from European robotic arm operator cosmonaut Andrey Fedyaev.

This was the fourth spacewalk in Prokopyev’s career, and the second for Petelin. It is the third spacewalk at the station in 2023 and the 260th spacewalk for space station assembly, maintenance, and upgrades.

The two Roscosmos cosmonauts will also conduct a spacewalk on Tuesday, April 25, to relocate an experiment airlock from Rassvet to Nauka.

An additional spacewalk is planned on Thursday, May 4, to deploy the radiator on Nauka and connect mechanical, electrical, and hydraulic lines.


Learn more about station activities by following the space station blog@space_station and @ISS_Research on Twitter, as well as the ISS Facebook and ISS Instagram accounts.

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Cosmonauts Begin Spacewalk to Move Roscosmos Radiator

Cosmonauts Sergey Prokopyev and Dmitri Petelin work on the outside of the Rassvet module during a spacewalk on Nov. 17, 2022. Credit: NASA TV
Cosmonauts Sergey Prokopyev and Dmitri Petelin work on the outside of the Rassvet module during a spacewalk on Nov. 17, 2022. Credit: NASA TV

Roscosmos cosmonauts Sergey Prokopyev and Dmitri Petelin began a spacewalk at 9:40 p.m. EDT to relocate a radiator from the Rassvet module to the Nauka science module with assistance from European robotic arm operator cosmonaut Andrey Fedyaev. Coverage of the spacewalk continues on NASA Television, the NASA app, and the agency’s website.

Prokopyev is wearing an Orlan spacesuit with red stripes, while Petelin is wearing the suit with blue stripes. This is the fourth spacewalk in Prokopyev’s career, and the second for Petelin. It is the third spacewalk at the station in 2023 and the 260th spacewalk for space station assembly, maintenance, and upgrades.


Learn more about station activities by following the space station blog@space_station and @ISS_Research on Twitter, as well as the ISS Facebook and ISS Instagram accounts.

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Cosmonauts Getting Ready for Spacewalk Live on NASA TV

Expedition 69 Commander Sergey Prokopyev (left) is conducting his fifth career spacewalk. Flight Engineer Dmitri Petelin (right) is conducting his third spacewalk.
Expedition 69 Commander Sergey Prokopyev (left) is conducting his fifth career spacewalk. Flight Engineer Dmitri Petelin (right) is conducting his third spacewalk.

NASA Television coverage is underway for today’s spacewalk with Roscosmos cosmonauts Sergey Prokopyev and Dmitri Petelin. The duo, with assistance from European robotic arm operator cosmonaut Andrey Fedyaev, will relocate a radiator from the Rassvet module to the Nauka science module on the International Space Station Coverage of the spacewalk is on NASA Television the NASA app, and agency’s website.

Prokopyev and Petelin will exit out of the Poisk module at about 9:30 p.m. EDT Prokopyev is wearing the Orlan spacesuit with red stripes, while Petelin is wearing the suit with blue stripes. This is the fourth spacewalk in Prokopyev’s career, and the second for Petelin. It is the third spacewalk at the station in 2023 and the 260th spacewalk for space station assembly, maintenance, and upgrades.


Learn more about station activities by following the space station blog@space_station and @ISS_Research on Twitter, as well as the ISS Facebook and ISS Instagram accounts.

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Cosmonauts Rest Before Spacewalk, Astronauts Work Eye-Brain Study

Cosmonauts Sergey Prokopyev and Dmitri Petelin are pictured conducting a six-hour and 25-minute spacewalk in their Orlan spacesuits on Nov. 17, 2022.
Cosmonauts Sergey Prokopyev and Dmitri Petelin are pictured conducting a six-hour and 25-minute spacewalk in their Orlan spacesuits on Nov. 17, 2022.

The Expedition 69 cosmonauts are sleeping in today resting up for a logistics spacewalk set to begin tonight. Meanwhile, the rest of the International Space Station crew continued cleaning biology research hardware, conducted an eye and brain study, and serviced a pair of spacesuits.

Commander Sergey Prokopyev and Flight Engineer Dmitri Petelin have completed their spacewalk preparations and are getting a good night’s sleep before beginning a spacewalk at 9:30 p.m. EDT today. The pair from Roscosmos will exit the Poisk module‘s airlock in their Orlan spacesuits and spend about six hours and 40 minutes moving a radiator from the Rassvet module to the Nauka science module.

Fellow cosmonaut Andrey Fedyaev will assist the spacewalkers from inside the station operating the European robotic arm and maneuvering the radiator from Rassvet to Nauka. NASA TV begins its live spacewalk coverage at 9 p.m. Tuesday on the agency’s app and website.

While all three cosmonauts rested, the orbital outpost’s four astronauts were busy with science and spacesuit work on Tuesday. The foursome split its time throughout the day maintaining science hardware, studying how microgravity affects their eyes and brain, and cleaning spacesuits.

NASA Flight Engineers Frank Rubio and Stephen Bowen worked together Tuesday cleaning up the Cell Biology Experiment Facility (CBEF) located in the Kibo laboratory module. The CBEF housed biological samples that were returned to Earth inside the SpaceX Dragon cargo craft several hours after it undocked from the station at 11:05 a.m.  Saturday. Those samples and more will be analyzed by scientists on Earth to continue learning how living in weightlessness affects the human body.

Rubio later checked out the KERMIT fluorescence microscope that supports biology, physics, and materials research. Bowen joined NASA Flight Engineer Woody Hoburg at the end of the day for eye exams that are part of the ISAFE study that measures eye, brain, and blood vessel changes in space.

Hoburg began his day checking cooling loops and collecting water samples from inside an Extravehicular Mobility Unit (EMU), or spacesuit. UAE (United Arab Emirates) Flight Engineer Sultan Alneyadi continued the EMU maintenance as he recharged and filled water tanks in the suits. The spacesuit work is being done in advance of a spacewalk planned for Friday, April 28, to continue upgrading the station’s power generation capability.


Learn more about station activities by following the space station blog@space_station and @ISS_Research on Twitter, as well as the ISS Facebook and ISS Instagram accounts.

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Crew Preps for Tuesday Spacewalk, Next Cargo Mission Departure

Cosmonaut Sergey Prokopyev is pictured in his Orlan spacesuit during a spacewalk outside the Zvezda service module on Aug. 15, 2018.
Cosmonaut Sergey Prokopyev is pictured in his Orlan spacesuit during a spacewalk outside the Zvezda service module on Aug. 15, 2018.

Spacewalk preparations are under way at the International Space Station as two cosmonauts get ready for the first of three spacewalks set to begin on Tuesday. The rest of the Expedition 69 crew is cleaning up following the departure of a U.S. cargo craft while also working on a pair of Extravehicular Mobility Units (EMUs), or spacesuits.

Commander Sergey Prokopyev and Flight Engineer Dmitri Petelin are set to begin their second spacewalk together at 9:30 p.m. EDT on Tuesday. The duo spent Monday reviewing the tasks required to move a radiator from the Rassvet module to the Nauka science module during the planned six-hour and 40-minute excursion. Prokopyev and Petelin also set up their spacewalking tools, installed components on their Orlan spacesuits, and organized the Poisk module’s airlock where they will exit the station.

Roscosmos Flight Engineer Andrey Fedyaev will assist the spacewalkers in and out of their spacesuits on Tuesday and command the European robotic arm to maneuver the radiator and attach it to Nauka. NASA TV begins its live spacewalk coverage at 9 p.m. on Tuesday on the agency’s app and website.

Two NASA Flight Engineers spent Monday cleaning up after the SpaceX Dragon cargo craft departed the orbital outpost on Saturday returning 4,300 pounds of science experiments and station hardware back to Earth for analysis. Astronauts Woody Hoburg and Frank Rubio cleaned and stowed biology hardware housing samples that were shipped back to Earth aboard Dragon. Those samples and others will now be examined by scientists to understand how the human body adapts to living and working in weightlessness.

The NASA duo also partnered up with UAE (United Arab Emirates) astronaut Sultan Alneyadi loading another U.S. resupply ship ahead of its departure at the end of the week. The three flight engineers are packing trash and other discarded gear inside the Northrop Grumman Cygnus space freighter before it leaves the station later this week. Alneyadi will be on duty that morning monitoring Cygnus as mission controllers on the ground command the Canadarm2 robotic arm to release the spacecraft from the Unity module’s Earth-facing port. Cygnus will then reenter Earth’s atmosphere above the Pacific Ocean for a fiery, but safe demise.

Finally, Alneyadi and NASA Flight Engineer Stephen Bowen worked together resizing a pair of EMUs in the Quest airlock. The two astronauts are getting the U.S. spacesuits ready for an upcoming spacewalk to continue upgrading the station’s power generation capability.


Learn more about station activities by following the space station blog@space_station and @ISS_Research on Twitter, as well as the ISS Facebook and ISS Instagram accounts.

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