October 4, 1957: The Launch of Sputnik and the Dawn of the Space Age | Aerospace Lectures
60 years ago, Soviets launch Sputnik 3 | NASA
Sputnik 1 - Wikipedia
On This Day: Soviet Union launches Sputnik 1 - UPI.com
Sputnik design
What was Sputnik One? - Universe Today
Sputnik 1957 hi-res stock photography and images - Alamy
USSR launches Sputnik-3
The Rocket That Launched Sputnik and Started the Space Race
Russia Launched Sputnik on October 4 1957
Sputnik 1 (PS-1 #1) - Gunter's Space Page
Remembering Sputnik - The satellite that began the Space Race - NASASpaceFlight.com
4 October 1957 – Sputnik 1 – Explaining Science
Sputnik 1 - Wikipedia
How Sputnik Worked
History of Sputnik. Explorer. Vanguard. 1957. 1958. First space launch. Artificial satellite.
Sputnik's legacy – Physics World
History of Satellites
Soviets Launch Sputnik, 1957 | Origins
Sputnik Launched
Soviet Union Launches Sputnik: October 4, 1957 - The official blog of Newspapers.com
When Soviets Launched Sputnik, C.I.A. Was Not Surprised - The New York Times
The Rocket That Launched Sputnik and Started the Space Race
The Sputnik 1 Launch: The First Artificial Satellite To Enter Earth's Orbit | Mach | NBC News - YouTube
Sputnik
How Sputnik 1 launched the space age
