Astronauts

Mae Jemison

National Aeronautics and Space Administration

Maksim Surayev

Russian Federal Space Agency (ROSCOSMOS)

Mamoru Mohri

Japan Aerospace Exploration Agency

Mannequin Skywalker

Blue Origin

Marc Garneau

Canadian Space Agency

Marc Hagle

Blue Origin

Marco Alain Sieber

European Space Agency

Marcos Berríos

National Aeronautics and Space Administration

Marcos Pontes

Brazilian Space Agency

Marcus Wandt

European Space Agency

Margaret Rhea Seddon

National Aeronautics and Space Administration

Marina Vasilevskaya

Russian Federal Space Agency (ROSCOSMOS)

Mário Ferreira

Blue Origin

Mario Runco Jr.

National Aeronautics and Space Administration

Mark Bezos

Blue Origin

Mark C. Lee

National Aeronautics and Space Administration

Mark Kelly

National Aeronautics and Space Administration

Mark L. Polansky

National Aeronautics and Space Administration

Mark N. Brown

National Aeronautics and Space Administration

Mark Pathy

Axiom Space

Mark Shuttleworth

Mark Stucky

Virgin Galactic

Mark T. Vande Hei

National Aeronautics and Space Administration

Marsha Ivins

National Aeronautics and Space Administration

Martin J. Fettman

National Aeronautics and Space Administration

Marty Allen

Blue Origin

Mary Ellen Weber

National Aeronautics and Space Administration

Mary L. Cleave

National Aeronautics and Space Administration

Mason Angel

Blue Origin

Matthew Dominick

National Aeronautics and Space Administration

Matthias Maurer

European Space Agency

Maurizio Cheli

European Space Agency

Michael A. Baker

National Aeronautics and Space Administration

Michael Alsbury

Virgin Galactic

Michael Barratt

National Aeronautics and Space Administration

Michael Coats

National Aeronautics and Space Administration