Sputnik | Satellites, History, & Facts | Britannica
How Sputnik 1 launched the space age
Sputnik 1 | NASA
Sputnik 1 - Wikipedia
Sputnik Rocket: Reaching orbit, in style! | The Space Techie
Sputnik 1: The First Artificial Earth Satellite | Anderson Design Group
The “Simplest Satellite” That Opened Up the Universe | American Scientist
Sputnik I > National Museum of the United States Air Force™ > Display
Sputnik: The Shock of the Century: Dickson, Paul: 9780802713650: Amazon.com: Books
When Soviets Launched Sputnik, C.I.A. Was Not Surprised - The New York Times
Sputnik 1 - Wikipedia
Interesting facts about the Sputnik I satellite
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The World's First Artificial Satellite
Sputnik 1 Satellite Digital Art by Erik Simonsen - Fine Art America
Sputnik-2
Space Race Timeline | Royal Museums Greenwich
Sputnik 1! 7 Fun Facts About Humanity's First Satellite | Space
Sputnik 1 (Replica) - Frontiers of Flight Museum
USSR Launches Sputnik
Sputnik 50 years later: Why was it first, what is significance to space professionals? > Air Force Space Command (Archived) > Display
Sputnik Launched
Sputnik
Sputnik at 60: Read Original 1957 Coverage of Launch | Time
