Video:
http://youtu.be/qvPzUAeWZZY
The launch of Sputnik 1 marked one of the most monumental events in human history: it was the first man made satellite created to orbit the Earth. It was also the event that triggered the space race, which would continue to innovate technology with every country competing against one another to have the most advanced spacecraft. The project started on December 17th, 1954 when Sergie Korolov created the idea of developing an Earth orbiting satellite. Once his plan was approved, the space race had only just begun. Many scientists and engineers worked on this project, solving problems concerning orbit speed and velocity. October 4th, 1957 was the day that Sputnik was finally launched. 90 minutes after the launch, scientists heard the "beep beep beep" sound, confirming that the satellite was in full orbit. When Sputnik launched, it changed everything. From then in, countries were sending their own satellites up into space left and right, all with the goal of dominating the space race.
Sources:
http://en.wikipedia.org/wiki/Sputnik_1
http://history.nasa.gov/sputnik/
http://www.space.com/17563-sputnik.html