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By NASA
2 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
What are the dangers of going to space?
For human spaceflight, the first thing I think about is the astronauts actually strapping themselves to a rocket. And if that isn’t dangerous enough, once they launch and they’re out into space in deep exploration, we have to worry about radiation.
Radiation is coming at them from all directions. From the Sun, we have solar particles. We have galactic cosmic rays that are all over in the universe. And those cause damage to DNA. On Earth here, we use sunscreen to protect us from DNA damage. Our astronauts are protected from the shielding that’s around them in the space vehicles.
We also have to worry about microgravity. So what happens there? We see a lot of bone and muscle loss in our astronauts. And so to prevent this, we actually have the astronauts exercising for hours every day. And of course we don’t want to run out of food on a space exploration mission. So we want to make sure that we have everything that the astronauts need to take with them to make sure that we can sustain them.
There are many risks associated with human space exploration. NASA has been planning for these missions to make our astronauts return home safely.
[END VIDEO TRANSCRIPT]
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Last Updated Apr 02, 2025 Related Terms
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By NASA
4 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
The Crew Module Test Article (CMTA), a full scale mockup of the Orion spacecraft, is seen in the Pacific Ocean as teams practice Artemis recovery operations during Underway Recovery Test-12 onboard USS Somerset off the coast of California, Saturday, March 29, 2025. NASA/Bill Ingalls Preparations for NASA’s next Artemis flight recently took to the seas as a joint NASA and Department of Defense team, led by NASA’s Exploration Ground Systems Program, spent a week aboard the USS Somerset off the coast of California practicing procedures for recovering the Artemis II spacecraft and crew.
Following successful completion of Underway Recovery Test-12 (URT-12) on Monday, NASA’s Landing and Recovery team and their Defense Department counterparts are certified to recover the Orion spacecraft as part of the upcoming Artemis II test flight that will send NASA astronauts Reid Wiseman, Victor Glover, and Christina Koch, as well as CSA (Canadian Space Agency) astronaut Jeremy Hansen, on a 10-day journey around the Moon.
“This will be NASA’s first crewed mission to the Moon under the Artemis program,” said Lili Villarreal, the landing and recovery director for Artemis II. “A lot of practice led up to this week’s event, and seeing everything come together at sea gives me great confidence that the air, water, ground, and medical support teams are ready to safely recover the spacecraft and the crew for this historic mission.”
A wave breaks inside the well deck of USS Somerset as teams work to recover the Crew Module Test Article (CMTA), a full scale replica of the Orion spacecraft, as they practice Artemis recovery operations during Underway Recovery Test-12 off the coast of California, Thursday, March 27, 2025.NASA/Joel Kowsky Once Orion reenters Earth’s atmosphere, the capsule will keep the crew safe as it slows from nearly 25,000 mph to about 325 mph. Then its system of 11 parachutes will deploy in a precise sequence to slow the capsule and crew to a relatively gentle 20 mph for splashdown off the coast of California. From the time it enters Earth’s atmosphere, the Artemis II spacecraft will fly 1,775 nautical miles to its landing spot in the Pacific Ocean. This direct approach allows NASA to control the amount of time the spacecraft will spend in extremely high temperature ranges.
The Artemis II astronauts trained during URT-11 in February 2024, when they donned Orion Crew Survival System suits and practiced a range of recovery operations at sea using the Crew Module Test Article, a stand -in for their spacecraft.
For the 12th training exercise, NASA astronauts Deniz Burnham and Andre Douglas, along with ESA (European Space Agency) astronaut Luca Parmitano, did the same, moving from the simulated crew module to USS Somerset, with helicopters, a team of Navy divers in small boats, NASA’s open water lead – a technical expert and lead design engineer for all open water operations – as well as Navy and NASA medical teams rehearsing different recovery scenarios.
Grant Bruner, left, and Gary Kirkendall, right, Orion suit technicians, are seen with ESA (European Space Agency) astronaut Luca Parmitano, second from left, and NASA astronauts Deniz Burnham, center, and Andre Douglas, as they prepare to take part in Artemis recovery operations as part of Underway Recovery Test-12 onboard USS Somerset off the coast of California, Thursday, March 27, 2025. NASA/Joel Kowsky “Allowing astronauts to participate when they are not directly involved in a mission gives them valuable experience by exposing them to a lot of different scenarios,” said Glover, who will pilot Artemis II. “Learning about different systems and working with ground control teams also broadens their skillsets and prepares them for future roles. It also allows astronauts like me who are assigned to the mission to experience other roles – in this case, I am serving in the role of Joe Acaba, Chief of the Astronaut Office.”
NASA astronaut and Artemis II pilot Victor Glover, right, speaks to NASA astronauts Andre Douglas and Deniz Burnham as they prepare to take part in practicing Artemis recovery procedures during Underway Recovery Test-12 onboard USS Somerset off the coast of California, Friday, March 28, 2025.NASA/Joel Kowsky NASA astronaut Deniz Burnham smiles after landing in a Navy helicopter onboard USS Somerset during Underway Recovery Test-12 off the coast of California, Thursday, March 27, 2025.NASA/Bill Ingalls As the astronauts arrive safely at the ship for medical checkouts, recovery teams focus on returning the spacecraft and its auxiliary ground support hardware to the amphibious transport dock.
Navy divers attach a connection collar to the spacecraft and an additional line to a pneumatic winch inside the USS Somerset’s well deck, allowing joint NASA and Navy teams to tow Orion toward the ship. A team of sailors and NASA recovery personnel inside the ship manually pull some of the lines to help align Orion with its stand, which will secure the spacecraft for its trip to the shore. Following a safe and precise recovery, sailors will drain the well deck of water, and the ship will make its way back to Naval Base San Diego.
The Artemis II test flight will confirm the foundational systems and hardware needed for human deep space exploration, taking another step toward missions on the lunar surface and helping the agency prepare for human missions to Mars.
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Allison Tankersley
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Last Updated Mar 31, 2025 Related Terms
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By USH
On the night of February 23, 2025, residents of Tucumán, Argentina witnessed an astonishing sight during a violent thunderstorm. As a powerful lightning bolt tore through the sky, it briefly illuminated a massive, cigar-shaped object hovering in the storm’s center.
Eyewitnesses described the object as dark, elongated, and solid, standing in stark contrast to the swirling storm clouds around it. Unlike a natural weather phenomenon, the shape appeared structured and deliberate, leading many to speculate that it was a UFO of intelligent design, possibly of extraterrestrial origin.
It is not clear whether the object was struck by the lightning but there have been reports of UFOs being hit by lightning yet remaining unaffected, suggesting they may either harness or withstand immense energy levels.
Some researchers believe that certain UFOs absorb energy from lightning as a means of propulsion or power generation. In past cases, similar sightings have been reported in the presence of electrical storms, further fueling theories that such crafts may recharge their systems using natural energy sources.
It is known that theoretical physics explores the concept of extracting energy from electrical phenomena, such as Tesla’s ideas about wireless energy transmission. If an advanced civilization mastered this, lightning could be a viable energy source.
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By NASA
6 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
Located off the coast of Ecuador, Paramount seamount is among the kinds of ocean floor features that certain ocean-observing satellites like SWOT can detect by how their gravitational pull affects the sea surface.NOAA Okeanos Explorer Program More accurate maps based on data from the SWOT mission can improve underwater navigation and result in greater knowledge of how heat and life move around the world’s ocean.
There are better maps of the Moon’s surface than of the bottom of Earth’s ocean. Researchers have been working for decades to change that. As part of the ongoing effort, a NASA-supported team recently published one of the most detailed maps yet of the ocean floor, using data from the SWOT (Surface Water and Ocean Topography) satellite, a collaboration between NASA and the French space agency CNES (Centre National d’Études Spatiales).
Ships outfitted with sonar instruments can make direct, incredibly detailed measurements of the ocean floor. But to date, only about 25% of it has been surveyed in this way. To produce a global picture of the seafloor, researchers have relied on satellite data.
This animation shows seafloor features derived from SWOT data on regions off Mexico, South America, and the Antarctic Peninsula. Purple denotes regions that are lower relative to higher areas like seamounts, depicted in green. Eötvös is the unit of measure for the gravity-based data used to create these maps.
NASA’s Scientific Visualization Studio Why Seafloor Maps Matter
More accurate maps of the ocean floor are crucial for a range of seafaring activities, including navigation and laying underwater communications cables. “Seafloor mapping is key in both established and emerging economic opportunities, including rare-mineral seabed mining, optimizing shipping routes, hazard detection, and seabed warfare operations,” said Nadya Vinogradova Shiffer, head of physical oceanography programs at NASA Headquarters in Washington.
Accurate seafloor maps are also important for an improved understanding of deep-sea currents and tides, which affect life in the abyss, as well as geologic processes like plate tectonics. Underwater mountains called seamounts and other ocean floor features like their smaller cousins, abyssal hills, influence the movement of heat and nutrients in the deep sea and can attract life. The effects of these physical features can even be felt at the surface by the influence they exert on ecosystems that human communities depend on.
This map of seafloor features like abyssal hills in the Indian Ocean is based on sea surface height data from the SWOT satellite. Purple denotes regions that are lower relative to higher areas like abyssal hills, depicted in green. Eötvös is the unit of measure for the gravity-based data used to create these maps.NASA Earth Observatory This global map of seafloor features is based on ocean height data from the SWOT satellite. Purple denotes regions that are lower compared to higher features such as seamounts and abyssal hills, depicted in green. Eötvös is the unit of measure for the gravity-based data used to create these maps.NASA Earth Observatory This map of ocean floor features like seamounts southwest of Acapulco, Mexico, is based on sea surface height data from SWOT. Purple denotes regions that are lower relative to higher areas like seamounts, indicated with green. Eötvös is the unit of measure for the gravity-based data used to create these maps.NASA Earth Observatory Mapping the seafloor isn’t the SWOT mission’s primary purpose. Launched in December 2022, the satellite measures the height of water on nearly all of Earth’s surface, including the ocean, lakes, reservoirs, and rivers. Researchers can use these differences in height to create a kind of topographic map of the surface of fresh- and seawater. This data can then be used for tasks such as assessing changes in sea ice or tracking how floods progress down a river.
“The SWOT satellite was a huge jump in our ability to map the seafloor,” said David Sandwell, a geophysicist at Scripps Institution of Oceanography in La Jolla, California. He’s used satellite data to chart the bottom of the ocean since the 1990s and was one of the researchers responsible for the SWOT-based seafloor map, which was published in the journal Science in December 2024.
How It Works
The study authors relied the fact that because geologic features like seamounts and abyssal hills have more mass than their surroundings, they exert a slightly stronger gravitational pull that creates small, measurable bumps in the sea surface above them. These subtle gravity signatures help researchers predict the kind of seafloor feature that produced them.
Through repeated observations — SWOT covers about 90% of the globe every 21 days — the satellite is sensitive enough to pick up these minute differences, with centimeter-level accuracy, in sea surface height caused by the features below. Sandwell and his colleagues used a year’s worth of SWOT data to focus on seamounts, abyssal hills, and underwater continental margins, where continental crust meets oceanic crust.
Previous ocean-observing satellites have detected massive versions of these bottom features, such as seamounts over roughly 3,300 feet (1 kilometer) tall. The SWOT satellite can pick up seamounts less than half that height, potentially increasing the number of known seamounts from 44,000 to 100,000. These underwater mountains stick up into the water, influencing deep sea currents. This can concentrate nutrients along their slopes, attracting organisms and creating oases on what would otherwise be barren patches of seafloor.
Looking Into the Abyss
The improved view from SWOT also gives researchers more insight into the geologic history of the planet.
“Abyssal hills are the most abundant landform on Earth, covering about 70% of the ocean floor,” said Yao Yu, an oceanographer at Scripps Institution of Oceanography and lead author on the paper. “These hills are only a few kilometers wide, which makes them hard to observe from space. We were surprised that SWOT could see them so well.”
Abyssal hills form in parallel bands, like the ridges on a washboard, where tectonic plates spread apart. The orientation and extent of the bands can reveal how tectonic plates have moved over time. Abyssal hills also interact with tides and deep ocean currents in ways that researchers don’t fully understand yet.
The researchers have extracted nearly all the information on seafloor features they expected to find in the SWOT measurements. Now they’re focusing on refining their picture of the ocean floor by calculating the depth of the features they see. The work complements an effort by the international scientific community to map the entire seafloor using ship-based sonar by 2030. “We won’t get the full ship-based mapping done by then,” said Sandwell. “But SWOT will help us fill it in, getting us close to achieving the 2030 objective.”
More About SWOT
The SWOT satellite was jointly developed by NASA and CNES, with contributions from the Canadian Space Agency (CSA) and the UK Space Agency. NASA’s Jet Propulsion Laboratory, managed for the agency by Caltech in Pasadena, California, leads the U.S. component of the project. For the flight system payload, NASA provided the Ka-band radar interferometer (KaRIn) instrument, a GPS science receiver, a laser retroreflector, a two-beam microwave radiometer, and NASA instrument operations. The Doppler Orbitography and Radioposition Integrated by Satellite system, the dual frequency Poseidon altimeter (developed by Thales Alenia Space), the KaRIn radio-frequency subsystem (together with Thales Alenia Space and with support from the UK Space Agency), the satellite platform, and ground operations were provided by CNES. The KaRIn high-power transmitter assembly was provided by CSA.
To learn more about SWOT, visit:
https://swot.jpl.nasa.gov
News Media Contacts
Jane J. Lee / Andrew Wang
Jet Propulsion Laboratory, Pasadena, Calif.
818-354-0307 / 626-379-6874
jane.j.lee@jpl.nasa.gov / andrew.wang@jpl.nasa.gov
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Last Updated Mar 19, 2025 Related Terms
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