From the inception of life, humans are interested in the unknown and for the exploration of far flung regions of space, the famous agency NASA had sent two spacecraft Voyager 1 and 2.
They were sent 40 years back and to the amazement of the entire world, they are still sending information and images back to the earth.Nasa launched the Voyager 1 spacecraft on September 5, 1977, and the Voyager 2 on August 20, 1977.
During their 40 years of operation, they have sent numerous of images which helped to understand minute details of planets - the Great Red Spot, the swirling clouds and the rings of Saturn.
Voyager 1 became the only spacecraft to have entered interstellar space in 2012, and the Voyager 2 is the only spacecraft to have flown by all four outer planets – Jupiter, Saturn, Uranus, and Neptune.
They have set many records and one of them is their planetary encounters that include the discovery of the first active volcanoes beyond Earth – on Jupiter's moon Io – and the most Earth-like atmosphere in the solar system – on Saturn's moon Titan.
Voyager 1 left our solar system and now is about 13 billion miles away. Voyager 2 is close behind but on a different trajectory.
They have unveiled many wonders of the universe to human and are still doing a great job.