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 →
October 4
Sputnik
Mission
Sputnik
Series
Soviet space program
Venue
Baikonur Cosmodrome, Kazakh SSR
Date
October 4, 1957
Agency
Soviet space program
Nickname
Sputnik 1 becomes the first artificial satellite
Crew
Sergei Korolev

Sputnik 1 becomes the first artificial satellite

The Soviet Union launched Sputnik 1, the first artificial satellite to orbit Earth, a polished metal sphere that transmitted radio pulses heard around the world. The launch stunned the West, triggered the Space Race, and led directly to the creation of NASA the following year.

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