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About

E. Riihonen is a space radiation physicist whose work is critical to understanding the hazards of long-duration human spaceflight. Their primary research areas include measuring and characterizing space radiation environments, assessing the biological risks from galactic cosmic rays and trapped particles, and developing radiation monitoring technologies for deep-space missions. Riihonen’s most notable contribution is their lead authorship of the landmark study “Space radiation measurements during the Artemis I lunar mission” (2024, 30 citations), which provided the first comprehensive in-situ radiation data from a crew-capable vehicle beyond low Earth orbit in decades. This work directly informs risk models for cancer, cataracts, and degenerative diseases, and is essential for planning future lunar and Mars expeditions. Riihonen’s research has been instrumental in shaping NASA’s radiation safety standards, and their measurements from Artemis I are now a foundational reference for the Artemis program. With a growing citation impact and a focus on translating complex dosimetry into actionable astronaut health guidelines, Riihonen is a key voice in the next era of human exploration.