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Brazilian technology in a historical mission expanded monitoring of the human body in deep space, with data on sleep, light, and physical activity collected during a trip around the Moon, strengthening the role of national scientific research in high-complexity international projects.
Astronauts from the Artemis II mission used, before, during, and after the flight around the Moon, a pulse device developed from research conducted at the University of São Paulo.
The equipment, known as actigraph, recorded patterns of sleep, physical activity, and light exposure throughout the mission, which concluded on April 10, 2026, after about ten days in space.
The information is part of studies on health and human performance in long-duration flights.
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The technology originated at the School of Arts, Sciences, and Humanities at USP, in the eastern zone of the São Paulo capital, under the coordination of Professor Mario Pedrazzoli.
After the initial phase of academic research, the project received support from the PIPE program of Fapesp and was refined by the company Condor Instruments, which allowed its application in international missions.
The device began to be used in a NASA research initiative aimed at understanding how the deep space environment affects the crew’s organism.
How the actigraph monitors sleep and activity in space
Worn on the wrist, the actigraph resembles a digital watch but serves a scientific purpose.
The device tracks movements, rest routines, and light exposure, including important parameters for regulating the sleep-wake cycle.
In missions beyond low Earth orbit, this type of monitoring has gained strategic importance because the alternation between rest, workload, and physiological adaptation directly affects crew safety.
NASA describes the ARCHeR investigation, linked to Artemis II, as a study aimed at observing the well-being, activity, and sleep of astronauts in deep space.
The agency also reports that the mission expanded the collection of biomedical data before, during, and after the flight, combining wearable sensors with other tests and clinical samples.
This set should serve as a basis for future protocols in longer missions, including those planned for continued lunar exploration and, later, for trips to Mars.
Unlike commercial fitness-focused watches, the equipment developed from USP research was designed for academic investigation.
Therefore, its use is associated with areas such as chronobiology, neuroscience, and public health.
The practical difference lies in the type of data collected and the precision required for scientific studies, especially in extreme scenarios where small changes in sleep or light can affect cognition, mood, and operational performance.
Artemis II Mission and the Human Return to the Moon’s Orbit
The Artemis II marked the first crewed flight of the Artemis program and the first human journey around the Moon since the Apollo era.
The mission was launched on April 1, 2026, and ended with a landing in the Pacific Ocean, off the coast of California, at 8:07 PM Eastern Time, equivalent to the night of April 10 in Brasília.
The Orion capsule completed a lunar flyby trajectory and safely returned to Earth.
The crew consisted of Reid Wiseman, Victor Glover, and Christina Koch from NASA, along with Jeremy Hansen from the Canadian Space Agency.
After the splashdown, the four underwent initial medical evaluations aboard the recovery ship USS John P. Murtha and proceeded for further examinations in Houston.
Nasa itself classified the return as successful and regarded the mission as a central step for the next phases of the lunar program.
Although the phrase “return to the Moon” is often used in coverage of the Artemis program, Artemis II did not land on the lunar surface.
The objective was to validate systems, the operation of the Orion spacecraft, crew performance, and research on human health during a journey beyond Earth’s orbit.
Why Astronaut Sleep is Monitored
Studies from space agencies have indicated for years that sleep is often affected in crewed missions.
Changes in light, confinement, operational demands, and physiological changes can compromise rest, attention, and decision-making.
For this reason, pulse sensors that monitor activity and light exposure have become relevant tools for understanding how the body reacts outside of Earth and for adjusting work, rest, and lighting routines on board.
In Artemis II, this monitoring gained extra value by involving what is called deep space, with conditions different from those experienced on the International Space Station.
The Canadian Space Agency, a partner in the mission, states that the study also aims to measure stress, cognitive performance, and team dynamics.
The expectation is that this data will help guide the preparation of future crews who will spend more time away from Earth.
In this context, the use of a technology developed in Brazil reinforces the international reach of research conducted at public universities.
The recognition comes not only from the symbolism of being part of a historic mission but also from the practical application of an instrument created to answer concrete questions in sleep science and human adaptation in extreme environments.
The selection of the equipment for Artemis II places Brazilian research in a global agenda of space exploration and human health.
The presence of the actigraph in the mission also highlights a recurring path of scientific innovation.
The combination of university research, public funding, and subsequent technological development in the productive sector allowed a project born in an academic environment to reach a high-complexity operation.
With the safe return of Artemis II, NASA will analyze both the performance of the capsule and flight systems as well as the biomedical results collected throughout the journey.
Part of this material will be used to define protective measures, routines, and medical monitoring in future missions.
Among them is the continuation of the Artemis program, aimed at consolidating a more frequent human presence in the vicinity and, later, on the lunar surface.
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