Space probe comet 67P/Churyumov-Gerasimenko in November 2014. First probe to Jupiter. Radio communications were lost with Pioneer 10 on January 23, 2003, because of the loss of electric power for its radio transmitter, with the probe at a distance of 12 billion kilometers (80 AU) from Earth. First probe to fly by Saturn. (Communications were later lost due to power constraints and vast distance.) "Voyager 1" is a 733-kilogram probe launched September 5, 1977. It visited Jupiter and Saturn and was the first probe to provide detailed images of the moons of these planets. "Voyager 1" is the farthest human-made object from
Exploration of Jupiter a European "Jovian Europa Orbiter" mission were also studied, but were superseded by the "Europa Jupiter System Mission". The "Europa Jupiter System Mission" (EJSM) was a joint NASA/ESA proposal for exploration of Jupiter and its moons. In February 2009 it was announced that both space agencies had given this mission priority ahead of the "Titan Saturn System Mission". The proposal included a launch date of around 2020 and consists of the NASA-led "Jupiter Europa Orbiter", and the ESA-led "Jupiter Ganymede Orbiter". ESA's contribution had encountered funding competition from other ESA projects. However, the "Jupiter Europa Orbiter" (JEO), NASA's contribution, was