Original: Voyager 1 was launched on September 5 , 1977 , by the National Aeronautics and Space Administration from Cape Canaveral , Florida aboard a Titan IIIE/Centaur carrier rocket , shortly after its twin space probe , Voyager 2 on August 20 , 1977 .
Simplified: Voyager 1 was launched on September 5 , 1977 by NASA from Cape Canaveral aboard a Titan IIIE Centaur rocket , shortly after its sister craft , Voyager 2 on August 20 , 1977 .