Telstar refers to a series of communications satellites. The first two, Telstar 1 and Telstar 2, were experimental and nearly identical. Telstar 1 launched atop of a Thor-Delta rocket on July 10, 1962, successfully relayed the first television pictures, telephone calls, and telegraph images through the space. It also provided the first live transatlantic television feed. Telstar 2 was launched May 7, 1963. Telstar 1 and 2—though no longer functional—still orbit the Earth. Description.
https://en.wikipedia.org/wiki/Telstar