When the Telstar 1 satellite successfully launched 50 years ago, the world got a little smaller.
Telstar, a collaboration between U.S., French, and British broadcasting agencies, was the world’s first active communication satellite, enabling TV programs to be broadcast across the Atlantic. The 3-foot-long satellite was also the first to send the television signals, telephone calls, and fax images through space.
Before Telstar was launched, microwave towers could flash TV shows and other communication information from point to point through the air, supplementing the landlines that already crisscrossed the globe. But once these signals reached the ocean, they reached their limit.
Satellite transmission allowed instantaneous communication – such as long-distance phone calls and real-time international TV – to become an everyday reality. The phrase “live, via satellite” is only possible with Telstar and the machines that followed it into space.
So, in tribute to Telstar 1, here we look back on the little satellite that helped make the modern world.
Above:
Tiny Satellite
Telstar 1 was built as an international collaboration between AT&T;, Bell Labs, NASA, the British General Post Office, and the French National Post, Telegraph, and Telecom Office. The satellite launched on a Delta rocket on July 10, 1962.
The aluminum satellite was wimpy by modern standards. It used 14 watts of power – roughly one-seventh that of a modern laptop – generated by the 3,600 solar panels on its outer hull. As well, it could only carry 600 phone calls and one black-and-white TV channel, though not much more was really needed at the time.
Telstar 1 was placed in low Earth orbit and circled the planet every two and a half hours, only in the right position to beam transmissions between Europe and the U.S. for 20 minutes each orbit. This is in contrast to contemporary communications satellites, which fly in geosynchronous orbit, staying above one spot on the Earth.
Image: NASA Goddard
