Alexander Gerst
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Alexander Gerst (born 3 May 1976 in Künzelsau, Baden-Württemberg) is a German European Space Agency astronaut and geophysicist, who was selected in 2009 to take part in space training. He was part of the International Space Station Expedition 40 and 41 from May to November 2014. Gerst returned to space on June 6, 2018, as part of Expedition 56/57. He is the current Commander of the International Space Station.

Gerst graduated from the Technical High School in Öhringen, Germany, in 1995. While in high school, he volunteered as a scout leader, firefighter, and water rescue lifeguard.

Gerst studied at the University of Karlsruhe, Germany, where he received a degree in geophysics with distinction.

From 1998 to 2003 Gerst participated in several international scientific collaborations and field experiments, including some in remote locations such as Antarctica.

From 2001 to 2003, Gerst studied for a master's degree in earth sciences at Victoria University of Wellington in New Zealand. While researching his master's thesis, he developed volcano monitoring techniques that might improve forecasts of volcanic eruptions. His results were published in Science Magazine.