On This Day in Space History

A CHRONICLE OF SPACEFLIGHT

THE SPACE RACE · THE SHUTTLE ERA · ROBOTIC EXPLORATION · 1957–PRESENT

Welcome to On This Day A daily chronicle of humanity in space — the launches, landings, spacewalks, and firsts that mark the space age. Start here. Read the welcome →
July 17
Apollo-Soyuz Test Project
Mission
Apollo-Soyuz Test Project
Series
NASA
Venue
Low Earth orbit
Date
July 17, 1975
Agency
NASA
Nickname
Apollo and Soyuz dock in the first international crewed mission
Crew
Tom Stafford
Alexei Leonov
Deke Slayton

Apollo and Soyuz dock in the first international crewed mission

American Apollo and Soviet Soyuz spacecraft docked in orbit and their crews shook hands, marking the first joint crewed mission between the two Cold War rivals. The Apollo-Soyuz Test Project symbolized detente and laid groundwork for future international cooperation in space.

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