Spacewalk Preps and Human Research Fill the Expedition 74 Schedule

Spacewalk Preps and Human Research Fill the Expedition 74 Schedule

Flight engineer Sophie Adenot of ESA (European Space Agency) assists flight engineer Chris Williams of NASA as he tries on his spacesuit, testing its comfort and mobility as well as its communications and life support systems inside the International Space Station’s Quest airlock. Williams was preparing for a spacewalk to replace a malfunctioning wrist joint on the Canadarm2 robotic arm, planned for June 30, 2026.
ESA astronaut Sophie Adenot assists NASA astronaut Chris Williams as he tries on his spacesuit, testing its comfort and mobility as well as its communications and life support systems ahead of a spacewalk planned for June 30, 2026.
NASA

The Expedition 74 crew members continued their spacewalk preparations on Wednesday reviewing robotics activities and configuring tools. The orbital residents also kept up their ongoing biomedical research and advanced technology studies aboard the International Space Station.

NASA flight engineers Chris Williams and Jessica Meir continue gearing up for their second spacewalk together set to begin at 8:35 a.m. EDT on Tuesday, June 30. The duo joined each other inside the Quest airlock and inspected the tethers that will secure the spacewalkers to the outside of the orbital outpost. They also collected and organized the equipment they will carry with them into the vacuum of space including pistol grip tools, cameras, stowage bags, and more. Williams and Meir will spend about six hours and 40 minutes next week replacing a malfunctioned wrist joint on the Canadarm2 robotic arm. NASA and the Canadian Space Agency (CSA) officials will preview the upcoming spacewalk tasks during a news conference on NASA’s YouTube channel at 2 p.m. on Thursday, June 25.

Williams and Meir also gathered with flight engineers Jack Hathaway of NASA and Sophie Adenot of ESA (European Space Agency) and called down to mission controllers in Houston, Texas, to talk about the upcoming spacewalk procedures. Afterward, the quartet practiced on a computer the delicate robotic maneuvers required to access and replace the wrist joint on the Canadarm2. Hathaway and Adenot will support the two spacewalkers next week helping them in and out of their spacesuits, monitoring their spacewalking activities, and carefully adjusting the Canadarm2 into position during the repair work.

Eye exams were the final task of the day for Meir as she operated medical imaging hardware inside the Harmony module and examined Williams’ retina, lens, and cornea to check his eye health. Hathaway loaded a CubeSat-packed deployer onto a platform inside the Kibo laboratory module for placement outside of the space station. Adenot wrapped up her shift testing the network connectivity of a computer tablet inside the SpaceX Dragon crew spacecraft.

Cosmonauts Sergey Kud-Sverchkov and Sergei Mikaev, the station’s commander and flight engineer from Roscosmos, also conducted eye checks, this time using the Ultrasound 3 device inside the Columbus laboratory module. Doctors on the ground monitored the ultrasound scans in real time to detect potential space-caused changes to eye pressure and structure. The duo then took turns testing artificial intelligence tools to boost crew efficiency and communications in space. Roscosmos flight engineer Andrey Fedyaev focused on studying how living in space affects the human body throughout Wednesday.

Fedyaev kicked off his shift placing sensors on his chest to measure his heart’s electrical activity. Next, he attached cuffs to his arm, wrist, and fingers measuring his blood pressure. Doctors are exploring how the circulatory system adjusts in microgravity since the human heart doesn’t pump blood as hard as it does on Earth. Finally, the two-time space lab resident wore an acoustic sensor around his neck that recorded his rapid exhalation for insights into his respiratory health.

Learn more about station activities by following the space station blog, @space_stationon X, as well as the ISS Facebook and ISS Instagram accounts.

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Mark A. Garcia

Career Spotlight: Electrician (Ages 14-18)

Career Spotlight: Electrician (Ages 14-18)

5 Min Read

Career Spotlight: Electrician (Ages 14-18)

What does an electrician do?

Electricity powers the world, and electricians are the ones who get it where it needs to go. An electrician is an expert who is trained to make sure electrical systems and equipment are installed safely and working correctly. Electricians are involved in a variety of systems, including power, lighting, communications, and more – anything that needs electricity to run.

While electricians ensure systems and equipment have the power they need, electrical technicians focus on building, modifying, or testing electronic devices.

What are some of the different types of work electricians and electrical technicians do at NASA?

At NASA, electricians keep the lights on and the power flowing for rocket launches, scientific research, and everything in between. Their skills support engineers and scientists in building and testing spacecraft, aircraft, satellites, telescopes, and the equipment that makes human spaceflight possible. Electricians make sure all facilities and equipment have the power and functionality they need to be safe and ready to support NASA’s missions.

Electrical technicians at the agency help bring big ideas to life. They might build and wire control systems, connect tiny sensors to circuit boards, or write the software to make a device work in a specific way. They also test instruments in conditions that mimic space – extreme temperatures, intense vibrations, and even a vacuum – to make sure they will survive and perform well during their missions. Technicians use specialized tools, earn certifications, and work with incredible precision.

Being an electrician or electrical technician at NASA is careful, hands‑on work carried out with expertise. Because space hardware is headed to places like low-Earth orbit, the Moon, or even Mars, every detail has to be perfect.

What are the different certification levels for electricians?

The information below is a general overview of the career path of an electrician. Specific guidelines for these roles vary from state to state. It’s important to look up the license requirements in your state.

  • Apprentice electrician: This four-year job training program provides an entry into the industry. An apprentice works as an assistant to an experienced supervisor, gaining vital hands-on experience to move ahead as an electrician.
  • Journeyman electrician: A journeyman is an electrician who has finished an apprenticeship, then passed a test. At this stage, the electrician is licensed and allowed to work without supervision.
  • Master electrician: This is the highest certification possible for an electrician. Typically, a master electrician is someone who has completed approximately 4,000 hours as a journeyman, then passed a licensing exam. These electricians are qualified to work on complicated projects. They can also serve as supervisors for apprentices or journeymen following in their footsteps.

How can I become an electrician?

There are many options that provide the training needed to get started as an electrician or electrical technician.

Many community colleges, trade schools, and technical institutes offer a two-year program leading to an associate degree in electrical technology. Additionally, trade unions and apprenticeship programs provide real-world experience in the field.

Additionally, all branches of the U.S. military offer electronics training that may be transferrable to college credits or civilian certifications.

How can I start preparing today to become an electrician?

It’s never too early to set the stage for an electrifying career! In high school, you can take courses in math, science, and technical education. At the same time, you can start learning about basic electrical concepts such as circuitry and safety.

Begin researching associate degree programs and apprenticeship opportunities so you can consider which pathway seems right for you. Weighing these options now will help you understand program requirements and ensure you’re ready to take the next step.

You can also gain useful experience through part-time work, or shadowing electricians on the job.

What skills will I need to be a successful electrician?

Technical skills focus on the basics – how electricity works, how to stay safe, and how to read schematics and wiring diagrams. Some jobs also call for special hands‑on abilities, like soldering tiny components, putting together cables, or even having some familiarity with chemistry.

Being curious, open‑minded, and a good communicator matters, too. Any time you’re building or improving a device, you must understand who will use it and what they need it to do. Asking questions, sharing ideas, and being able to take feedback are essential to consistently building systems and devices that work well.

A person sitting at a desk operating equipment
David McClaeb, electronic technician, NASA’s Goddard Space Flight Center in Greenbelt, Maryland

Advice from NASA electricians and electronic technicians

“As an aerospace technician, you have the opportunity to make a big difference. You can make a really big impact.” – Christopher Johnson, aerospace electrical engineering technician, NASA’s Kennedy Space Center in Florida

“What I wish I knew in high school is how many opportunities there are for electricians. I didn’t realize how big of a scale it really was. Everything needs electricity, and the sky’s the limit on what you can do with it. NASA needs electricians for everything from their testing campaigns to keeping their facilities running.” – Levi James, electrician apprentice, NASA’s Glenn Research Center at Armstrong Test Facility in Sandusky, Ohio

“It’s so gratifying when somebody comes in and says, ‘Hey, we want to build this, but it looks really difficult,’ and we say, ‘Yeah, it looks difficult, but we can do it’ – and we build it and then we hand it over to them, and then we’re on to the next thing. It’s a challenge, and I’m telling you, it is just so fun.” – David McClaeb, electronic technician, NASA’s Goddard Space Flight Center in Greenbelt, Maryland

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Sandra May

Curiosity Blog, Sols 4927–4933: Let’s Drive to That Smooth Area

Curiosity Blog, Sols 4927–4933: Let’s Drive to That Smooth Area

4 min read

Curiosity Blog, Sols 4927–4933: Let’s Drive to That Smooth Area

A black-and-white landscape photograph of the Martian surface taken by the Curiosity rover. The ground features a heavily textured, polygonal cracked pattern, with light-colored material forming raised veins or ridges along many of the cracks. Several dark, flat rock slabs and smaller loose rocks are scattered across the foreground and middle ground. On the right side of the image, the textured tread marks of the rover's wheels are clearly visible pressed into the soil, curving slightly as they trail off into the distance.
NASA’s Mars rover Curiosity acquired this image showing a breathtaking diversity of polygons, veins, and other textural features waiting for investigation by the Mars Science Laboratory team. Curiosity captured the image using its Left Navigation Camera on June 17, 2026 – Sol 4928, or Martian day 4,928 of the Mars Science Laboratory mission – at 17:47:52 UTC.
NASA/JPL-Caltech

By Susanne P. Schwenzer, Professor of Planetary Mineralogy at The Open University, UK

Earth planning date: Thursday, June 18, 2026

In the area Curiosity is currently exploring, the science team has mapped several areas with different-looking surface texture on the orbital images. If you wanted to have a look yourself at what there is to see, check the “Where is Curiosity?” map. You’ll discover different shades of orange and beige as well as more rough and more smooth-looking textures. This is what the geomorphologists in our team use to map the areas for exploration by the rover. Of course, we then supplement this all with ground-based images, including bespoke “drive direction imaging,” which is taken after each drive by the Mast Camera. Drive planning is done using a combination of all this information. So there shouldn’t be any surprises, right?

On Monday the team planned three sols in preparation for a Thursday planning to account for the U.S. federal holiday weekend. The workspace turned out to be a little spiky, so we could not find an area we could DRT. APXS still found one good bedrock target, “Rio Baker,” which also had MAHLI documentation. In addition, ChemCam investigated “Rica Aventura,” a textured bedrock, and “Tabebuia,” a darker-looking individual block, using its LIBS and conducted a passive spectral observation on a second dark float block called “Lago Ranco.” Of course, the team also wanted to look into the distance with ChemCam remote imaging, extending our investigation of the Cordillera base outcrop.

Imaging is always high on the list. In Monday’s plan Mastcam is looking into the modern dunes with the “Tacaza” mosaic, and with more mosaics looking forward to the future parking areas, some of which looked really smooth from that vantage point. We also continue our environmental and atmospheric observations looking for dust devils, the opacity of the atmosphere, and monitoring pressure and temperature. After all this, the rover drove about 35 meters (about 115 feet) to an area that looked really smooth in all images we had available at that point. So we were hoping for a good spot to deploy the DRT, but didn’t think we could be in for a surprise.

The drive ended exactly as planned, spot-on in the middle of that — from a distance — smooth-looking area. But when we opened the post-drive images on Thursday morning, we were all reacting with a lot of surprise. From up close, the parking spot looks anything but smooth. You can see the surprise in the title image of this blog. There are polygons, veins, lamination, and probably more, once we inspect the higher-resolution images taken today. “Higher-resolution” is the key for why we were in for such a surprise! The features are quite small, a few centimeters across, and therefore we could not see them in the orbital images or from a distance in our navigation and mast camera images. The camera resolution from a distance just isn’t enough to see them. But up close, the terrain revealed all its beauty! And I am sure there will be more in the even higher resolution of today’s MAHLI and ChemCam RMI imager images!

So, what did we plan after we caught our breath on Thursday? First, you guessed it, images, images, and more images. Mastcam takes a full panorama with its “left eye” and adds a range of closer-up mosaics with its higher-resolution “right eye.” In addition there is a ChemCam Remote Micro Imager image to document structures further afield at high resolution. ChemCam is investigating three targets using LIBS: “Rio Chimore” is a lighter-toned band; you can see some of those in the cover image of this blog, too. The other two LIBS targets are “Rio de Lava,” a vein target, and “Rio de Salta,” one of the polygons. APXS is also looking at the bedrock and the ridges, at the targets “Pampa Grande” and “Iquique Ridge.” MAHLI is having the above-mentioned close “hand lens” look. Let’s see what we will discover when we get those images.

Finally, Curiosity drove up the hill along very smooth-looking terrain that is just littered with tiny polygons. Let’s see if we are in for another surprise reverberating around all our offices — and across two continents, as I had the good fortune to be among the first ones, here in England (Or maybe it was our French ChemCam colleagues, who are in a time zone one hour ahead of me?). Whichever it is, this terrain has a lot to say about the geologic history of Mars!

A rover sits on the hilly, orange Martian surface beneath a flat grey sky, surrounded by chunks of rock.
NASA’s Curiosity rover at the base of Mount Sharp
NASA/JPL-Caltech/MSSS

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Jun 24, 2026

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Playing the Moon Game 

Playing the Moon Game 

A satellite image shows part of Alaska’s Katmai National Park. A chain of snowy mountain peaks stretches from the bottom left corner to the right side of the image. The Valley of Ten Thousand Smokes is a long, tan-colored feature runs toward the northwest in the upper-left.
September 29, 2025

In preparing to visit the Moon’s surface, soon-to-be lunar explorers in NASA’s Apollo program first ventured into a variety of unfamiliar landscapes on Earth. A couple of these trips, in the summers of 1965 and 1966, took astronauts to Alaska’s remote Katmai National Park for simulations of field geology in Moon-like environments.

In one exercise, which they called “playing the Moon game,” pairs of astronauts were placed at unfamiliar field sites and asked to pretend as if they were on the Moon. By the account of William Phinney, Apollo’s science training coordinator, they were tasked with collecting representative geologic samples and practicing how to communicate their observations to scientists.

A detailed satellite image centers on the Valley of Ten Thousand Smokes in Alaska. The tan-colored feature runs southeast-to-northwest. Snowy peaks appear on the right side of the image, and green, forested valleys fill the left side.
September 29, 2025

The Alaskan setting for the Moon game was an unusual volcanic landscape called the Valley of Ten Thousand Smokes. The valley is full of debris deposited by the 1912 eruption of Novarupta—the largest volcanic event on Earth in the 20th century.

The images above, acquired on September 29, 2025, with the OLI (Operational Land Imager) on Landsat 9, show the massive ash flow deposited by Novarupta. The layer measures up to 660 feet (200 meters) thick and was emplaced at a searing 1,380 degrees Fahrenheit (750 degrees Celsius). 

The Valley of Ten Thousand Smokes, shown in the 1917 photo below, is so named because of the abundance of fumaroles—gas and steam-emitting vents—that filled the valley for a decade after the eruption. A few hundred persisted more than 10 years, with some lasting until the 1990s.

Three people stand in the foreground of this black-and-white photo, silhouetted by steam coming from a fumarole. A dark, barren landscape dotted with plumes of rising steam extends into the background.
1917

Scientists initially suspected that the monster eruption occurred at Mount Katmai, a neighboring volcano with a large caldera located 6 miles (10 kilometers) east of Novarupta’s dome. However, they later determined that the eruption actually occurred at Novarupta—whose name means “new eruption”—after stealing magma from beneath Katmai. As the magma chamber emptied, Katmai collapsed, forming the 2.5-mile-wide (4-kilometer-wide) caldera present today.

The volcanic landscape in the Valley of Ten Thousand Smokes is far fresher than the ancient lava flows that formed the Moon’s volcanic features. But for the Apollo astronauts, it offered an “excellent opportunity to view volcanic materials and landforms in nearly pristine condition,” Phinney wrote. They studied evidence of fumaroles and examined vertical sections of the deposits where streams had eroded deep gorges.

This photo shows a broad valley filled with tan-colored volcanic material in the foreground and snowy mountains in the background. The ashy volcanic deposits create a mostly flat valley floor, except where steep-sided chasms formed by erosion run through it.
June 9, 1991

Researchers continue to visit this Alaskan wilderness in search of clues that could help decipher the geology of the Moon and Mars. In 2024, the Goddard Instrument Field Team (GIFT) trekked to the Valley of Ten Thousand Smokes to study its icy volcanic landscape. Like the valley, Mars contains glaciers and ice sheets layered with dust and ash, a dynamic and difficult-to-interpret environment.

Advancing lunar science, the GIFT team also collected samples from rock formations comparable to the Moon’s Gruithuisen Domes. These mysterious features are made of hardened lava with a different composition than the surrounding rock. With more to learn about our nearest celestial neighbor, the spirit of the Moon game lives on in the 21st century.

NASA Earth Observatory images by Lauren Dauphin, using Landsat data from the U.S. Geological Survey. Photos from National Geographic Society Katmai expeditions photographs, Archives and Special Collections, Consortium Library, University of Alaska Anchorage, and from the U.S. Geological Survey Volcano Hazards Program. Story by Lindsey Doermann. 

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NASA Announces Spacewalkers for Robotic Arm Repair Work

NASA Announces Spacewalkers for Robotic Arm Repair Work

NASA astronauts Jessica Meir and Chris Williams, both Expedition 74 flight engineers, are pictured outside the International Space Station during a spacewalk to complete installation of a modification kit ahead of future solar array installation on the 2A power channel of the orbital outpost. It was William’s first spacewalk, Meir's fourth, and the 278th in support of space station maintenance, upgrades, and assembly.
NASA astronauts Jessica Meir (top) and Chris Williams are pictured during a spacewalk on March 18, 2026, to complete the installation of a solar array modification kit on the International Space Station.
NASA/Jack Hathaway

Spacewalk preparations filled the schedule aboard the International Space Station on Tuesday as a pair of astronauts gear up for next week’s external robotics repair job. CubeSat maintenance and eye checks rounded out the day for the Expedition 74 crew.

NASA flight engineers Chris Williams and Jessica Meir will once again wear their spacesuits and work together in the vacuum of space to repair a wrist joint on the Canadarm2 robotic arm starting at 7:35 a.m. EDT on Tuesday, June 30. The duo will spend about six hours and 40 minutes on the outside of the orbital lab replacing the malfunctioned wrist joint on Canadarm2 that has been in operation for over 25 years. NASA and the Canadian Space Agency (CSA) analyzed the issue and determined a spacewalk was necessary to replace the wrist joint with a spare already on the station. NASA and CSA officials will preview the upcoming spacewalk tasks during a news conference on NASA’s YouTube channel at 2 p.m. on Thursday, June 25.

Williams tried on his spacesuit Tuesday and tested the suit in its powered configuration with assistance from flight engineer Sophie Adenot from ESA (European Space Agency). The duo worked inside the Quest airlock checking the pressurized suit’s comfort and mobility and its communications and life support systems while engineers on the ground monitored.

Williams then joined Meir and reviewed on a computer a 3D interactive animation of the procedures and maneuvers they will use to return the Canadarm2 to full motion. Afterward, the pair took turns servicing emergency jet packs that will be installed on the spacesuits the day the spacewalk begins. Meir also installed batteries inside the pistol grip tools — designed especially for microgravity — they will use to work on the robotic arm.

Adenot and NASA flight engineer Jack Hathaway, who will monitor the spacewalkers from inside the orbital outpost, studied their spacewalk support roles including carefully adjusting the Canadarm2 into position during the repair work. Hathaway also had time for CubeSat work first removing a small satellite orbital deployer that was stowed inside the Kibo laboratory module’s airlock. Next, he installed a set of CubeSats inside the NanoRacks CubeSat deployer that will soon be placed outside Kibo’s airlock for deployment into Earth orbit. The tiny satellites were designed by university students for a variety of communications and technology investigations.

Station commander Sergey Kud-Sverchkov joined flight engineer Sergei Mikaev in the Harmony module for eye checks using standard medical imaging hardware. Doctors on the ground were examining how living in space affects the retina, lens, and cornea. Roscosmos flight engineer Andrey Fedyaev continued testing artificial intelligence tools to boost crew efficiency and communications in space.

Learn more about station activities by following the space station blog, @space_stationon X, as well as the ISS Facebook and ISS Instagram accounts.

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Mark A. Garcia