Since NASA’s Artemis II crew members safely splashed down in the Pacific Ocean on April 10 after their record-setting mission around the Moon, science teams have been busy collecting more data and combing through observations collected on the test flight. Results from these science investigations will help support safe human exploration of deep space and provide a blueprint for how future missions will conduct science on the lunar surface as NASA builds a Moon Base and develops an enduring human presence there.

Postflight crew health, performance data

In the hours, days, and weeks after landing, the Artemis II crew members, NASA astronauts Reid Wiseman, Victor Glover, Christina Koch, and CSA (Canadian Space Agency) astronaut Jeremy Hansen, contributed critical data to help the agency understand how the human body reacts to spaceflight. Collecting this data as soon as possible after landing was important to understand how the body adapts from microgravity to Earth’s gravity. The data will inform NASA’s understanding of how quickly crews can complete mission-critical tasks after landing on a planetary surface like the Moon or Mars, where there won’t be landing support personnel to assist.  

Within a day of splashdown, researchers collected a suite of data for the Artemis II Spaceflight Standard Measures study, which is part of a larger effort across the astronaut corps to gather a baseline set of health measurements on blood pressure, heart rate, eye health, and motor control. Crew members also completed a mini obstacle course, which included lying down, standing up, unfurling a rope ladder, ladder climbing, and more, to assess how their bodies were adapting to Earth’s gravity.

Once the crew returned to NASA’s Johnson Space Center in Houston, researchers guided them through further medical check-ups and tests of motor control. Over the next several days, the crew completed obstacle courses wearing spacesuits offloaded to lunar gravity, which is roughly one-sixth the force of Earth’s gravity. Researchers are now analyzing this data to gain insight into how crews may perform as they adapt to the gravity of a planetary surface.

As part of the Immune Biomarkers study, researchers are comparing blood and saliva samples collected after the Artemis II splashdown with samples collected preflight and during the mission. Among other topics, the study investigates whether and how dormant viruses reawaken in astronauts’ bodies while in space.

Some crew members completed postflight cognition tests and a simulated manual spacecraft docking task to assess motor control for the ARCHeR (Artemis Research for Crew Health & Readiness) study. This, combined with data collected through a wrist-worn device while crew members were in space, is used to understand the effect of space hazards on well-being and performance.

Initial data collections for Artemis II health studies concluded 45 days after splashdown. However, medical teams will continually monitor astronaut health throughout the Artemis II crew members’ lifetimes.

Once this data is processed and anonymized, information will be available for scientists to study the effects of spaceflight via a request to NASA’s Life Sciences Data Archive. The results from this work could lead to new technologies and studies that help predict the adaptability of crews on future missions to the Moon and Mars.

Analyzing astronaut-derived organ chips flown around Moon

Organ chips from NASA’s AVATAR (A Virtual Astronaut Tissue Analog Response) investigation are being analyzed at chip developer Emulate’s laboratory in Boston. The organ chips included bone marrow cells from each Artemis II astronaut. They flew around the Moon with the astronauts, and now researchers are studying these organ chips to determine how deep space radiation and microgravity affect human health at the molecular level.

Scientists are comparing the chips flown aboard the spacecraft to ground controls and crew blood samples using advanced techniques, including single-cell RNA sequencing. The analysis will characterize how organ chips model individual responses to spaceflight, which is data that could allow NASA to send future astronauts’ AVATAR chips ahead on missions to develop personalized medical kits. The researchers plan to share early findings at scientific conferences while full analysis continues.

Lunar imagery, audio for data release

On April 6, the Artemis II crew members studied features on and around the Moon for nearly seven hours during Orion’s closest approach to the lunar surface. Their work was guided by a minute-by-minute observation plan developed by the Artemis II lunar science team.

Scientists are reviewing the data collected from the mission, which includes images, video, and audio files, to release a report of their initial data interpretations later this year. The report will cover observations of impact flashes, variations in color on the lunar surface, and the shape and texture of faults and ridges. The team also will publish a report on how Artemis II lunar science observations were planned, organized, and executed for the benefit of future Artemis missions.

NASA will publish more than 100 science-related audio recordings with transcripts, as well as approximately 11,500 Earth and Moon image and video files from the mission science campaign, with accompanying data. While many of these images already are public, these records will be available through NASA’s Planetary Data System, a public archive of data from all of NASA’s planetary missions. To get the data ready, the team is converting files into standard formats that anyone can easily open and add information to make the data searchable in NASA’s archive for generations to come.

For more information on NASA’s Artemis II science efforts, visit:

https://www.nasa.gov/humans-in-space/artemis-ii-science/

Karen Fox / Molly Wasser

Headquarters, Washington

240-285-5155 / 240-419-1732

karen.c.fox@nasa.gov / molly.l.wasser@nasa.gov

The post NASA’s Artemis II Moon Mission Research Continues on Earth appeared first on NASA Science.

Since NASA’s Artemis II crew members safely splashed down in the Pacific Ocean on April 10 after their record-setting mission around the Moon, science teams have been busy collecting more data and combing through observations collected on the test flight. Results from these science investigations will help support safe human exploration of deep space and provide a blueprint for how future missions will conduct science on the lunar surface as NASA builds a Moon Base and develops an enduring human presence there.

Postflight crew health, performance data

In the hours, days, and weeks after landing, the Artemis II crew members, NASA astronauts Reid Wiseman, Victor Glover, Christina Koch, and CSA (Canadian Space Agency) astronaut Jeremy Hansen, contributed critical data to help the agency understand how the human body reacts to spaceflight. Collecting this data as soon as possible after landing was important to understand how the body adapts from microgravity to Earth’s gravity. The data will inform NASA’s understanding of how quickly crews can complete mission-critical tasks after landing on a planetary surface like the Moon or Mars, where there won’t be landing support personnel to assist.  

Within a day of splashdown, researchers collected a suite of data for the Artemis II Spaceflight Standard Measures study, which is part of a larger effort across the astronaut corps to gather a baseline set of health measurements on blood pressure, heart rate, eye health, and motor control. Crew members also completed a mini obstacle course, which included lying down, standing up, unfurling a rope ladder, ladder climbing, and more, to assess how their bodies were adapting to Earth’s gravity.

Once the crew returned to NASA’s Johnson Space Center in Houston, researchers guided them through further medical check-ups and tests of motor control. Over the next several days, the crew completed obstacle courses wearing spacesuits offloaded to lunar gravity, which is roughly one-sixth the force of Earth’s gravity. Researchers are now analyzing this data to gain insight into how crews may perform as they adapt to the gravity of a planetary surface.

As part of the Immune Biomarkers study, researchers are comparing blood and saliva samples collected after the Artemis II splashdown with samples collected preflight and during the mission. Among other topics, the study investigates whether and how dormant viruses reawaken in astronauts’ bodies while in space.

Some crew members completed postflight cognition tests and a simulated manual spacecraft docking task to assess motor control for the ARCHeR (Artemis Research for Crew Health & Readiness) study. This, combined with data collected through a wrist-worn device while crew members were in space, is used to understand the effect of space hazards on well-being and performance.

Initial data collections for Artemis II health studies concluded 45 days after splashdown. However, medical teams will continually monitor astronaut health throughout the Artemis II crew members’ lifetimes.

Once this data is processed and anonymized, information will be available for scientists to study the effects of spaceflight via a request to NASA’s Life Sciences Data Archive. The results from this work could lead to new technologies and studies that help predict the adaptability of crews on future missions to the Moon and Mars.

Analyzing astronaut-derived organ chips flown around Moon

Organ chips from NASA’s AVATAR (A Virtual Astronaut Tissue Analog Response) investigation are being analyzed at chip developer Emulate’s laboratory in Boston. The organ chips included bone marrow cells from each Artemis II astronaut. They flew around the Moon with the astronauts, and now researchers are studying these organ chips to determine how deep space radiation and microgravity affect human health at the molecular level.

Scientists are comparing the chips flown aboard the spacecraft to ground controls and crew blood samples using advanced techniques, including single-cell RNA sequencing. The analysis will characterize how organ chips model individual responses to spaceflight, which is data that could allow NASA to send future astronauts’ AVATAR chips ahead on missions to develop personalized medical kits. The researchers plan to share early findings at scientific conferences while full analysis continues.

Lunar imagery, audio for data release

On April 6, the Artemis II crew members studied features on and around the Moon for nearly seven hours during Orion’s closest approach to the lunar surface. Their work was guided by a minute-by-minute observation plan developed by the Artemis II lunar science team.

Scientists are reviewing the data collected from the mission, which includes images, video, and audio files, to release a report of their initial data interpretations later this year. The report will cover observations of impact flashes, variations in color on the lunar surface, and the shape and texture of faults and ridges. The team also will publish a report on how Artemis II lunar science observations were planned, organized, and executed for the benefit of future Artemis missions.

NASA will publish more than 100 science-related audio recordings with transcripts, as well as approximately 11,500 Earth and Moon image and video files from the mission science campaign, with accompanying data. While many of these images already are public, these records will be available through NASA’s Planetary Data System, a public archive of data from all of NASA’s planetary missions. To get the data ready, the team is converting files into standard formats that anyone can easily open and add information to make the data searchable in NASA’s archive for generations to come.

For more information on NASA’s Artemis II science efforts, visit:

https://www.nasa.gov/humans-in-space/artemis-ii-science/

Karen Fox / Molly Wasser

Headquarters, Washington

240-285-5155 / 240-419-1732

karen.c.fox@nasa.gov / molly.l.wasser@nasa.gov

One of the first images transmitted back to Earth from the Artemis II mission was a stunner. In a single image, Earth’s full disk appears amid celestial phenomena that illustrate its place in the solar system. And although the visible hemisphere appears to be awash in sunlight, it is actually lit by moonlight. The astronauts’ vantage point provided a rare opportunity to capture nighttime features—most notably lights from human habitation—from a new perspective.

An Artemis crew member captured the photo from the Orion spacecraft after it completed the translunar injection burn, which sent the spacecraft out of Earth orbit and on a trajectory toward the Moon. In the photo, Earth eclipses the Sun from Orion’s perspective, leaving only a small sliver of its bright light visible around the bottom right edge. Green auroras, caused by charged particles from the Sun interacting with Earth’s upper atmosphere, glow around the north and south poles (lower left and upper right, respectively).

The Sun’s light also produces the fuzzy glow, known as zodiacal light, that appears to the lower right of Earth. This phenomenon comes from sunlight reflecting off interplanetary dust. Skywatchers on Earth may see it at certain times of year around dawn or dusk as a faint column of light extending up from the horizon. Data collected by NASA’s Juno spacecraft on its journey to Jupiter suggest that Mars may be a significant source of the dust particles that produce zodiacal light. Earth’s other planetary neighbor, Venus, appears as the bright object in the bottom right of the image.

On Earth itself, city lights are evidence of human activity. Bright areas appear in Spain, Portugal, and northern Africa (lower left), sub-Saharan Africa (center left), and Brazil (center right). Digital camera technology—with help from the illumination of a full Moon—made it possible to see these and other details of Earth’s surface and atmosphere in low light. The crew set the camera’s ISO to 51,200 to make it highly sensitive to light. For comparison, an ISO setting of 100 or 200 is common for daytime photography.

Previous nighttime views of Earth taken from spacecraft may look very different from this photo but have also inspired and enlightened. For instance, the Apollo 12 crew photographed Earth eclipsing the Sun in 1969; astronaut Alan Bean would go on to depict his impressions of the event in paintings.

More recently, astronauts aboard the International Space Station have photographed the planet at night from low Earth orbit, while NASA’s Black Marble nighttime lights product suite uses satellite observations to produce science-quality records of nighttime lights at daily, monthly, and yearly time scales. Those programs provide sustained data records, while the Artemis II photo is distinctive as a single human-captured full-disk view showing many low-light features at once.

Cindy Evans, senior exploration scientist in the Astromaterials Research and Exploration Science Division at NASA’s Johnson Space Center, was working in the Science Evaluation Room during the Artemis II mission and was one of the first people on Earth to see the image. Evans was struck both by its beauty and the perspective revealed by all the visible solar system features. “I love the image so much because it was taken with Earth in moonshine, and shows Earth as a solar system body, a dynamic planet interacting with the solar wind, and a place harboring life,” she said.

The image is scientifically valuable, as well, said Miguel Román, Deputy Director for Atmospheres and Data Systems at NASA’s Goddard Space Flight Center. “It speaks powerfully to the breadth of what NASA does across science and human exploration,” he said. Román studies artificial light at night, as viewed from space, as a measurable signal of human activity.

“[This photo] reminds us that Earth at night is visually compelling, physically complex, and scientifically underexplored,” Román said. “I see this image as a glimpse of what Earth science can become in the future.”

NASA images prepared for Earth Observatory by Lauren Dauphin. Story by Lindsey Doermann.

References & Resources

• NASA (2026, April 22) Advancing Earth Observation at NASA Since Release of Earthrise Photo. Accessed June 2, 2026.
• NASA (2026, April 3) Hello, World. Accessed June 2, 2026.
• NASA (2006, October 9) Astronaut Still Photography During Apollo. Accessed June 2, 2026.
• NASA Earth Observatory (2026, May 15) Picturing Earth in a New Light. Accessed June 2, 2026.
• NASA Image and Video Library (2026, April 3) Earth From the Perspective of Artemis II. Accessed June 2, 2026.