Pioneer 10 .. First man made mission to leave solar system ..

 

First space craft to leave the solar system .. Launched in 1972, it crossed the Neptune orbit in 1983 , mission was officially called off in 1997, though signals were received from it till 2003, when it was at a distance of 12 billion kms from earth. It is presumed it is either still travelling at 1,32,000 kms/hour speed into the unknown limits of the universe or may have got caught in some planetary orbit and revolving around it.

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