Artemis II Astronauts Study Radiation’s Effects on Human Body

Artemis II Astronauts Study Radiation’s Effects on Human Body

NASA’s Artemis II mission is sending four astronauts on a journey around the Moon, but its most crucial accomplishment may be understanding the dangers of deep space radiation for future long-duration missions. The mission, which launched recently, aims to gather vital data on how the human body reacts to space radiation, a key challenge for ambitious journeys to Mars and beyond.

A New Perspective of Earth

Astronauts aboard the Orion spacecraft have captured stunning images of Earth, offering a unique perspective on our home planet. One striking photograph, taken by Commander Reed Wiseman, shows Earth as a crescent, illuminated by the Moon. This image highlights the fragility of our planet and serves as a poignant reminder of humanity’s place in the cosmos. The view is particularly fitting, as the mission’s only link to Earth is through Australia’s Deep Space Network.

Professor Ken Gaye from the University of Iowa noted the image’s special qualities. “This picture manages to capture the night side of the earth because the sun is eclipsed on the other side,” he explained. “What’s lighting the earth up in this picture is actually the moon.” The photo also reveals faint auroras at both the North and South Poles, a rare sight that underscores the dynamic interaction between space and Earth’s magnetic field.

Understanding Space Radiation

A primary focus of the Artemis II mission is studying the effects of space radiation on the human body. Unlike the relatively short Apollo missions 50 years ago, future missions to Mars will last much longer, requiring a deeper understanding of radiation’s impact. “One of the main things that this mission is trying to do is understand the effect on the human body of being in space,” Professor Gaye stated.

The astronauts are not only subjects of study but active participants in groundbreaking research. “They have cells, stem cells taken from the astronauts,” Gaye revealed. “And they’ve built these little biological avatars… that are being exposed to radiation in the spacecraft along with the astronauts.” These biological models, or “avatars,” allow scientists to study radiation’s effects in detail without directly exposing astronauts to additional risks. This research is crucial for planning missions that could last up to a thousand days, a significant leap from the ten days of the Artemis II mission.

Challenges and Unknowns

While NASA has a strong track record in managing technical aspects of spaceflight, the environmental challenges of deep space remain a significant unknown. The Van Allen radiation belts, areas of intense charged particles, were traversed quickly by the Artemis II crew, minimizing exposure. However, the vastness of space beyond Earth’s protective magnetic field presents ongoing risks.

“It’s the environmental side that you mentioned, that’s the key point,” Gaye emphasized. “They were not really exposed to much danger there [in the Van Allen belts]. But the rest of the mission, they are out there in an environment that’s somewhat unknown.” The mission aims to gather data that can help mitigate these risks for future, longer voyages.

Inspiring the Next Generation

Beyond the scientific objectives, the Artemis II mission serves as a powerful source of inspiration for young people interested in science, technology, engineering, and mathematics (STEM). The images and stories from space capture the imagination, encouraging a new generation of scientists and engineers.

“Seeing that, I realized that you know that is kind of a lot of what we’re doing here. We’re inspiring,” Gaye commented, recalling the wonder on a young relative’s face. He stressed that STEM skills are vital, but also encouraged aspiring individuals to pursue any passion, from communication to medicine. “You’ll find a way to help with this overall initiative if that’s what you want to do,” he assured.

Looking Ahead

As the Artemis II astronauts continue their lunar flyby, the data they collect on radiation exposure and its effects on biological samples will be invaluable. This mission is a critical stepping stone, providing the knowledge needed to ensure the safety and success of longer human expeditions to the Moon, Mars, and beyond. The success of Artemis II will pave the way for humanity’s expanded presence in the solar system.

Source: Artemis II: What will be the mission's most important accomplishment? (YouTube)