New Research Explores How a Short Trip to Space Affects the Human Body

By Lydia Amazouz Published on June 12, 2024 07:00
New Research Explores How A Short Trip To Space Affects The Human Body

New research has shown that space tourists experience some of the same bodily changes as astronauts who spend months in orbit.

The research, published in a series of studies on the health effects of space travel, provides a comprehensive look at how people without extensive astronaut training adapt to the conditions of space, including weightlessness and space radiation.

These findings are based on data from the all-civilian crew of SpaceX’s Inspiration4 mission, which spent three days in space in 2021.

Health Effects Observed in Space Tourists

The Inspiration4 mission provided a unique opportunity for researchers to study the immediate and short-term effects of space travel on the human body.

The four space tourists on this mission collected samples of blood, saliva, skin, and other tissues while in space. Upon analyzing these samples, researchers found wide-ranging shifts in cellular functions and changes to the immune system.

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These shifts were significant, indicating that even brief exposure to space can induce noticeable biological changes. Most of these changes stabilized once the crew returned to Earth, suggesting that short-term spaceflights do not pose significant health risks. "This is the first time we’ve had a cell-by-cell examination of a crew when they go to space," said Chris Mason of Weill Cornell Medicine, a researcher and co-author of the study. This granular level of analysis provides unprecedented insights into the biological impact of space travel on non-professional astronauts.

The studies revealed that the space tourists experienced physiological changes similar to those observed in professional astronauts. These changes included alterations in skin condition, kidney function, and immune system responses. The research highlighted that while some changes were temporary, others persisted for a longer period after the return to Earth.

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These findings were published in various Nature journals and added to a growing database of knowledge on the health impacts of space travel. Susan Bailey, a radiation expert at Colorado State University who participated in the research, noted that this detailed data will help better prepare humans for future space missions. The ability to monitor and understand these changes is critical for developing effective countermeasures to protect the health of future space travelers.

Cellular and Molecular Changes

One of the key findings of the research was the observation of significant cellular and molecular changes in the space tourists. The samples collected showed that exposure to the space environment caused shifts at the cellular level, including changes in gene expression and protein production.

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These changes are similar to those seen in astronauts on long-duration missions, suggesting that even short-term exposure to space can have measurable effects on human biology. The researchers observed modifications in the function of various cells, including immune cells, which could impact the body's ability to fight infections and repair tissues.

Afshin Beheshti, a researcher with the Blue Marble Space Institute of Science, emphasized the importance of these findings, stating that they could help develop strategies to counteract the negative effects of space travel. Understanding these cellular and molecular alterations is crucial for designing interventions that can mitigate the health risks associated with spaceflight.

The studies also delved into the effects of space radiation on the human body. Space tourists, like professional astronauts, are exposed to higher levels of cosmic radiation, which can cause DNA damage and increase the risk of cancer.

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The research found evidence of DNA repair mechanisms being activated in response to this exposure, indicating the body's attempt to counteract the damage. These findings underscore the need for effective radiation protection strategies for future space missions, particularly as commercial space travel becomes more common.

Implications for Future Space Travel

The data from the Inspiration4 mission provides valuable insights into the health effects of space travel on individuals without extensive training. This information is crucial as the opportunities for private space travel continue to expand. The findings from these studies have significant implications for the burgeoning space tourism industry and the future of human space exploration.

Allen Liu, a mechanical engineering professor at the University of Michigan, highlighted that understanding these effects will be essential for sending humans into space for various purposes, including tourism and long-term exploration missions. "This will allow us to be better prepared when we’re sending humans into space for whatever reason," Liu said.

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The research also suggests that space agencies and private companies must invest in developing comprehensive health monitoring and support systems for space tourists. These systems should be capable of detecting and addressing potential health issues promptly, ensuring the safety and well-being of individuals who may not have undergone the rigorous training that professional astronauts receive.

Additionally, the findings could inform the design of habitats and life support systems that mitigate the adverse effects of space travel, making it safer for everyone.


An editor specializing in astronomy and space industry, passionate about uncovering the mysteries of the universe and the technological advances that propel space exploration.

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