As of 2016, how many space probes have been sent to Jupiter from Earth?

There have been nine space probes that have been sent to Jupiter from Earth to study it up close. The first was Pioneer 10, which sailed past the striped giant in 1973. The last probe was Juno which in 2016 began a scheduled campaign. Its job included the task of getting as close to the Jovian giant as possible.

Most of the probes that have studied Jupiter had multiple mission objectives. Pioneer 10 also studied the asteroid belt, and then flew past Jupiter to study more distant regions of the solar system. But, with Juno, Jupiter has been the primary focus of its mission. The probe was programmed to come closer to the top of Jupiter's colorful clouds than any probe before it. Then, after about 20 months of observation, Juno has been programmed to end its mission by crashing into Jupiter, the gas giant.

Specifically, the nine spacecrafts that have visited Jupiter include: Pioneer 10 and 11, Voyager 1 and 2, Galileo, Cassini, Ulysses, New Horizons, and Juno. In the future, experts concerned with space missions state that actions will focus on the Jovian moons Europa, Ganymede, and Callisto, and their subsurface oceans.