Jupiter to several seconds, and short bursts (or S-bursts) that had a duration of less than a hundredth of a second. Scientists discovered that there were three forms of radio signals transmitted from Jupiter. Since 1973 a number of automated spacecraft have visited Jupiter, most notably the "Pioneer 10" space probe, the first spacecraft to get close enough to Jupiter to send back revelations about the properties and phenomena of the Solar System's largest planet. Flights to other planets within the Solar System are accomplished at a cost in energy, which is described by the net change in velocity of the
Exploration of Jupiter a European "Jovian Europa Orbiter" mission were also studied, but were superseded by the "Europa Jupiter System Mission".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