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A welder uses tools that join two or more parts through forces such as heat or pressure. Metals are the materials most commonly used in welding, but it’s also possible to weld thermoplastics or wood. Welders use their hands, skills, and problem-solving abilities to create something new.
At NASA, welders use different types of welding processes to assemble spacecraft and rocket components. Welders also put their expertise to work on equipment and facilities that make space exploration possible, such as launch pads, fuel tanks, propellant lines, and buildings where rockets are assembled.
Welding can be done in many different ways. Here are some of the types of welding used at NASA:
After graduating from high school, there are a couple of pathways to choose from. You can pursue an associate’s degree in welding, typically a two-year program available through community colleges and technical schools. Another option is to obtain a certificate from a vocational school or trade school. An apprenticeship during or after this training is often the next step toward a career as a professional welder.
Taking a welding class at your high school or local college is a great way to find out whether it’s a skill you enjoy. Research welding degrees and programs at colleges and schools to determine which one(s) fit your needs and interest. It’s also a good idea to research job vacancies to learn what employers are looking for. Finally, seek out opportunities for hands-on experience to help you practice and improve your welding skills.

Michelle Bahnsen
Research laboratory mechanic/welder at NASA’s Armstrong Test Facility, part of the agency’s Glenn Research Center
2026-02-05 18:38
NASA’s SpaceX Crew-12 mission is preparing to launch for a long-duration science mission aboard the International Space Station. During the mission, select crew members will participate in human health studies focused on understanding how astronauts’ bodies adapt to the low-gravity environment of space, including a new study examining subtle changes in blood flow.
The experiments, led by NASA’s Human Research Program, include astronauts performing ultrasounds of their blood vessels to study altered circulation and completing simulated lunar landings to assess disorientation during gravitational transitions, among other tasks. The results will help NASA plan for extended stays in space and future exploration missions.
The new study, called Venous Flow, will examine whether time aboard the space station increases the chance of crew members developing blood clots. In weightlessness, blood and other bodily fluids can move toward the head, potentially altering circulation. Any resulting blood clots could pose serious health risks, including strokes.
“Our goal is to use this information to better understand how fluid shifts affect clotting risk, so that when astronauts go on long-duration missions to the Moon and Mars, we can build the best strategies to keep them safe,” said Dr. Jason Lytle, a physiologist at NASA’s Johnson Space Center in Houston who is leading the study.
To learn more, crew members in this study will undergo preflight and postflight MRIs, ultrasound scans, blood draws, and blood pressure checks. During the flight, crew members also will capture their own jugular vein ultrasounds, take blood pressure readings, and draw blood samples for scientists to analyze after their return to Earth.
In another study, called Manual Piloting, select crew members will perform multiple simulated Moon landings before, during, and after the mission. Designed to assess their piloting and decision-making skills, participants attempt to fly a virtual spacecraft toward the lunar South Pole region — the same area future Artemis crews plan to explore.
“Astronauts may experience disorientation during gravitational transitions, which can make tasks like landing a spacecraft challenging,” said Dr. Scott Wood, a neuroscientist at NASA Johnson who is coordinating the investigation.
While spacecraft landings on the Moon and Mars are expected to be automated, crews must be prepared to take over and pilot the vehicle if necessary.
“This study will help us examine astronauts’ ability to operate a spacecraft after adapting from one gravity environment to another, and whether training near the end of their spaceflight can help prepare crews for landing,” said Wood. “We’ll monitor their ability to manually override, redirect, and control a vehicle, which will guide our strategy for training Artemis crews for future Moon missions.”
The risk of astronauts experiencing disorientation from gravitational transitions increases the longer they’re in space. For this study, which debuted during the agency’s SpaceX Crew-11 mission, researchers plan to recruit seven astronauts for short-term private missions lasting up to 30 days and 14 astronauts for long-duration missions lasting at least 106 days. A control group performing the same tasks as the astronauts will provide a basis of comparison.
A different study will investigate potential treatments for spaceflight associated neuro-ocular syndrome, or SANS, which causes vision and eye changes. Researchers will examine whether taking a daily B vitamin supplement can help relieve SANS symptoms.
After returning to Earth, select crew members will participate in a study that documents any injuries, such as scrapes or bruises that may occur during landing. Transitioning from weightlessness to Earth’s gravity can increase the injury risk without proper safeguards. The data will help researchers improve spacecraft design to better protect crews from landing forces.
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NASA’s Human Research Program
NASA’s Human Research Program pursues methods and technologies to support safe, productive human space travel. Through science conducted in laboratories, ground-based analogs, commercial missions, the International Space Station and Artemis missions, the program scrutinizes how spaceflight affects human bodies and behaviors. Such research drives the program’s quest to innovate ways that keep astronauts healthy and mission ready as human space exploration expands to the Moon, Mars, and beyond.
2026-02-05 16:39

This new Hubble image, released on Jan. 30, 2026, is the sharpest taken of NGC 7722, a lenticular galaxy located about 187 million light-years away in the constellation Pegasus. A lenticular, meaning “lens-shaped,” galaxy is a type whose classification sits between more familiar spiral galaxies and elliptical galaxies. It is also less common than spirals and ellipticals — partly because these galaxies have a somewhat ambiguous appearance, making it hard to determine if it is a spiral, an elliptical, or something in between.
Learn more about this observation.
Image credit: ESA/Hubble & NASA, R. J. Foley (UC Santa Cruz), Dark Energy Survey/DOE/FNAL/DECam/CTIO/NOIRLab/NSF/AURA; Acknowledgment: Mehmet Yüksek
2026-02-05 05:01
No Olympic competitions covers more ground than the 50-kilometer cross-country ski races. The grueling event takes more than 2 hours to complete, requiring competitors to ski a distance longer than a marathon. That’s still, however, less than an eighth of the distance between the two official host cities of the 2026 Winter Olympics and Paralympics—Milan and Cortina d’Ampezzo.
With events spread across more than 22,000 square kilometers (8,500 square miles) and eight cities or towns in northern Italy, these are the most geographically dispersed Games in Olympic history. The decentralized design was intentional, allowing planners to control costs and make the event more sustainable by using existing venues rather than constructing several expensive new facilities. More than 90 percent of the venues are existing or temporary facilities, including some refurbished facilities that were used in the 1956 Cortina d’Ampezzo Games.
About 2,900 athletes will compete across 116 events over 19 days in 13 venues in what will be the third time Italy has hosted the Games. Several of the key event venues are visible in these satellite images of the two largest host cities—Milan and Verona. The OLI (Operational Land Imager) on Landsat 8 and 9 captured the images on December 8 and 9, 2025, respectively.
Olympic festivities will kick off officially on February 6 at San Siro Stadium with performances by pop star Mariah Carey, classical singer Andrea Bocelli, classical instrumentalist Lang Lang, and Italian singer-songwriter Laura Pausini. Built in 1925, San Siro is Italy’s largest stadium and the longtime home of renowned football clubs AC Milan and Inter Milan.
Milan will mostly host indoor ice events in several other venues around the city. Ice hockey will be spread across two venues, the Milano Santagiulia Ice Hockey Arena and the temporary Milano Rho Ice Hockey Arena. The former, located east of the city in the green and residential Santa Giulia district, is the only new permanent venue constructed for the Games. The latter, in Milano Ice Park, is a temporary transformation of the Fiera Milano Rho exhibition center, a complex of pavilions and a convention center northwest of the city center.
Speed skating and figure skating will be in the Milano Ice Skating Arena, an 11,500-person stadium in Assago, a small town just outside of Milan. Outside of the Olympics, the multisport facility is used by a skating school and basketball team and as a venue for tennis, squash, swimming, and several other sports.
The February 22 closing ceremonies will take place in Verona, a city of about 250,000 people 150 kilometers east of Milan, in Verona Arena, an ancient Roman amphitheater that was built between the 1st and 3rd centuries. What was once used for animal hunts and gladiator battles will serve as the backdrop for musicians, dancers, and artists in a ceremony that organizers say will honor the spirit of athletics and Italy’s rich cultural heritage. The arena, with a seating capacity of about 22,000, is the third-largest surviving amphitheater in Europe and unusually well-preserved.
New events this year will include men’s and women’s ski mountaineering, skeleton mixed team relay, women’s doubles luge, freestyle skiing dual moguls, and women’s large hill ski jumping. The 2026 Olympic mascots are Tina and Milo, a brother-and-sister pair of cheerful, scarf-wearing animated stoats with names inspired by Milan and Cortina. Stoats, also called ermine, are fierce predators in the weasel family known for reportedly mesmerizing prey with energetic dances and for having fur that changes from dark brown in the summer to white in the winter. In Italy, stoats typically live in the mountains above 3,500 meters (11,500 feet).
NASA Earth Observatory image by Lauren Dauphin, using Landsat data from the U.S. Geological Survey. Story by Adam Voiland.
Stay up-to-date with the latest content from NASA as we explore the universe and discover more about our home planet.

The Bear Gulch fire spread through dense forest and filled skies with smoke in northwestern Washington state.

Sea ice around the southernmost continent hit one of its lowest seasonal highs since the start of the satellite record.

Satellite data show that Arctic sea ice likely reached its annual minimum extent on September 10, 2025.
2026-02-04 23:05
2 min read

Written by Alex Innanen, Atmospheric Scientist at York University, Toronto
Earth planning date: Friday, Jan. 30, 2026
Mars has emerged from its holiday behind the Sun, and we here on Earth have been able to reconnect with Curiosity and get back to work on Mars. Our first planning day last Friday gave Curiosity a full weekend of activities, which wrapped up with getting us ready for our next drill. We checked out a broken white rock in the workspace with APXS, MAHLI, and ChemCam’s laser spectrometer and finished up imaging a sandy area we’ve kept an eye on during conjunction to see if we could catch any wind motion, before taking a small drive to our drill location about 2 meters away (about 6 feet).
This location may look familiar — our next drill will be only a few centimeters away from “Nevado Sajama,” which we drilled back in November. The reason we’ve returned here is to do a rare SAM experiment the instrument’s last container of tetramethylammonium hydroxide (or TMAH, for less of a mouthful). TMAH is a chemical that we can mix with our sample from Nevado Sajama to help identify any organic molecules. SAM had only two containers of TMAH (the first of which we used almost six years ago, so we want to be very certain that everything will go well with this experiment. As a result, we did a rehearsal of the handoff of the sample to SAM in Wednesday’s plan, before we drill this weekend.
The TMAH experiment takes up a lot of Curiosity’s energy, so there isn’t a ton to spare for other science activities. Luckily, we’ve spent a lot of time in this area and have collected plenty of images of our surroundings. Because of that, we’ve used our little bit of extra time in the second half of the week for environmental observations. We’re well into the dusty season now, so we’re keeping an eye on dust both near (looking out for dust devils) and far (keeping track of how much dust is in the crater and wider atmosphere).

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