Because they were the first vehicles to leave the solar system.
Pioneer 11, Voyager 1, Voyager 2, Cassini-Huygens
Pioneer 11, Voyager 1, Voyager 2, Cassini-Huygens
Voyager 1 and Voyager 2.
Voyager 1 was launched on the 5th of September 1977 and Voyager 2 was launched before voyager 1 on the 20th of August 1977.
Voyager 1&2, Galileo Space Probe.
there were two main spacecrafts the voyager 1 and the voyager 2 that flew to Jupiter and in to deep space. It was in 1979.
Space probes voyager 1 and Voyager 2 were launched in 1977
There have been 4 missions to Saturn. Pioneer 11 Voyager 1 Voyager 2 Cassini Huygens For further information try google or Nasa http://www.nasa.gov/mission_pages/cassini/main/index.html http://www.nasa.gov/mission_pages/voyager/index.html http://www.nasa.gov/centers/ames/missions/archive/pioneer.html
Voyager 1 weighed about 1582 pounds, or about 722 kilograms. A link can be found below for more information.
Things that the Voyagers both did was take pictures of gas planets and record sounds from them planets as they orbited them. Now the Voyager 1 heads to the interstellar space while the voyager 2 does work on the outer solar system.
There were many Pioneer missions. Please see link for more information
The Voyager 1 was a space probe that was launched by NASA on September 5th, 1977 with the intention of studying the outer Solar System and interstellar medium. Currently, it is still operating and regularly sends back data to the Deep Space Network.