Astronauts

Sian Proctor

SpaceX

Sidney M. Gutierrez

National Aeronautics and Space Administration

Sigmund Jähn

Russian Federal Space Agency (ROSCOSMOS)

Sirisha Bandla

Virgin Galactic

Sir Richard Branson

Virgin Galactic

Sławosz Uznański

European Space Agency

Snoopy

National Aeronautics and Space Administration

Soichi Noguchi

Japan Aerospace Exploration Agency

Sol Alan Stern

National Aeronautics and Space Administration

Sonny Carter

National Aeronautics and Space Administration

Sophie Adenot

European Space Agency

Stanley G. Love

National Aeronautics and Space Administration

Starman

SpaceX

Stephanie Wilson

National Aeronautics and Space Administration

Stephen Bowen

National Aeronautics and Space Administration

Stephen Frick

National Aeronautics and Space Administration

Stephen Robinson

National Aeronautics and Space Administration

Stephen S. Oswald

National Aeronautics and Space Administration

Stephen Thorne

National Aeronautics and Space Administration

Steve MacLean

Canadian Space Agency

Steven Hawley

National Aeronautics and Space Administration

Steven Lindsey

National Aeronautics and Space Administration

Steven R. Nagel

National Aeronautics and Space Administration

Steven Smith

National Aeronautics and Space Administration

Steven Swanson

National Aeronautics and Space Administration

Steve Young

Blue Origin

Story Musgrave

National Aeronautics and Space Administration

Stuart Roosa

National Aeronautics and Space Administration

Sultan Al Neyadi

Mohammed bin Rashid Space Centre

Sultan bin Salman Al Saud

Space Research Institute of Saudi Arabia

Sunita Williams

National Aeronautics and Space Administration

Susan Helms

National Aeronautics and Space Administration

Susan Kilrain

National Aeronautics and Space Administration

Svetlana Savitskaya

Russian Federal Space Agency (ROSCOSMOS)

Sylvain Chiron

Blue Origin

Takao Doi

Japan Aerospace Exploration Agency