PROBES ON THE GO
The first space probe was the Soviet-launched Sputnik 1 in 1957. Sputnik was the first man-made object in space.
In July 1976, the Viking 1 probe made the first successful soft landing on Mars. The Viking 1 probe sent images back to Earth for more than six years.
Voyager 1 is the farthest man-made object from Earth at about 11.7 billion miles away. The probe is expected to transmit signals until 2020.