Exploration of Jupiter Exploration of Jupiter The exploration of Jupiter has been conducted via close observations by automated spacecraft. It began with the arrival of "Pioneer 10" into the Jovian system in 1973, and, , has continued with eight further spacecraft missions. All of these missions were undertaken by the National Aeronautics and Space Administration (NASA), and all but two have been flybys that take detailed observations without the probe landing or entering orbit. These probes make Jupiter the most visited of the Solar System's outer planets as all missions to the outer Solar System have used Jupiter flybys to reduce fuel requirements
Helena Russell stated his given name was 'Telford'.) In 1994, Helena was widowed when Lee Russell departed on the Astro Seven mission to Jupiter and never returned. All hands of the mission were declared dead. The couple never had children. After her husband's death, she was employed on Earth by the World Space Commission. In 1997, she was part of a team evaluating the mental state of Captain Tony Cellini. Cellini, the sole survivor of the Ultra Probe mission, returned to Earth speaking of his ordeal with a deadly space 'dragon' lifeform in a spaceship graveyard on the far side of planet