Astronaut Alexander Gerst of the European Space Agency is a backup crew member for Expedition 54-55. He is also the Flight Engineer for Expedition 56 and the Commander of Expedition 57
Information
Taken in
Johnson Space Center
Author
NASA
Description
Astronaut Alexander Gerst of the European Space Agency is a backup crew member for Expedition 54-55. He is also the Flight Engineer for Expedition 56 and the Commander of Expedition 57