Alexander Gerst ISS Legacy: ESA Astronaut’s Orbit Achievements And Future Lunar Mission Role

German European Space Agency (ESA) astronaut Alexander Gerst remains one of Europe’s most decorated spacefarers, having logged 362 total days aboard the International Space Station (ISS). Across two major long-duration expeditions, Gerst transformed European microgravity research while becoming the first German commander of the orbital outpost.

As space agencies transition toward deep space exploration in 2026, Gerst's extensive orbital experience continues to drive ESA's human spaceflight operational protocols and astronaut training.

From Blue Dot to ISS Command: Milestones in Low-Earth Orbit

Alexander Gerst made his spaceflight debut in May 2014 aboard Soyuz TMA-13M for Mission Blue Dot (Expedition 40/41). Over his 166-day stay, he executed dozens of ESA and partner experiments, performing a crucial six-hour spacewalk to relocate hardware and test new station equipment.

In May 2018, Gerst returned to the ISS aboard Soyuz MS-09 for his second long-duration mission, Horizons (Expedition 56/57). During this 197-day mission, Gerst made history by assuming command of the station for Expedition 57, making him only the second Western European astronaut to hold the position.

Gerst’s leadership was tested during the aborted launch of Soyuz MS-10 in October 2018, which temporarily reduced the station's crew size. His steady management ensured orbital operations, life support maintenance, and science schedules remained fully secure until new crews arrived.

Groundbreaking Experiments and Operational Contributions Aboard the Station

Gerst’s scientific tenure aboard the space station delivered major breakthroughs across multiple disciplines. A geophysicist and volcanologist by training, Gerst utilized the station's unique vantage point to document Earth’s dynamic climate system and environmental changes.

Key technical and scientific achievements include:

• CIMON Testing: Gerst conducted the initial zero-gravity operational trials for CIMON, an AI-powered crew assistant designed to aid astronauts with procedural steps and tasks.
• Advanced Metallurgy: He operated the ISS Electromagnetic Levitator (EML), melting and cooling metal alloys in mid-air to advance terrestrial industrial manufacturing processes.
• Biological & Health Studies: Gerst contributed to long-term human adaptation research, testing muscle preservation protocols and tracking cosmic radiation exposure.

His extensive educational outreach, dubbed "Fly Your Thesis!" and high-definition video updates from the ISS cupola, inspired millions of students across Europe to pursue STEM careers.

Beyond ISS: Steering ESA Toward the Artemis Era and Lunar Exploration

As the International Space Station approaches its final operational phase ahead of commercial station transitions, Gerst’s flight expertise is crucial to Europe's space future. Serving in senior astronaut leadership roles at ESA's European Astronaut Centre (EAC) in Cologne, Germany, Gerst actively trains the next generation of spacefarers.

ESA’s strategic integration into NASA’s Artemis program means veteran astronauts like Gerst are central to preparing crews for deep space operations aboard the Gateway lunar station and future surface missions. Gerst’s background in geology directly aligns with lunar surface sampling and field science goals.

With active astronaut training expanding for upcoming European space missions, Gerst’s dual mastery of complex orbital systems and scientific research keeps Europe firmly positioned at the forefront of human spaceflight.