None, as far as we know. All known space probes have been constructed here
and began their journeys here to visit other places.
space probes have crossed Pluto's orbit, but never have visited the planet because Pluto was not in alignment with the flight path of the space probes.
All of the eight planets have been visited or orbited by space probes.
The Viking space probes visited the planet Mars
All but Pluto, which is currently being visited.
April 2008 At present the only planet in our solar system that has not been visited (either by an orbiting spacecraft or flyby spacecraft) has been the recently planet downgraded body of Pluto. There is a mission currently in motion to visit this distant outpost.
No space probes have visited earth as all space probes have originated on earth and therefore cannot 'visit' because earth is it's home.
Humans have visited NO planet outside of Earth. Humans have visited the Moon, which is not normally considered a planet.Unmanned probes sent by humans, on the other hand, have already visited several planets.
Curiosity opportunity and spirit
Donkies
aside from earth, the planet that has been visisted by the most probes, is often said to be mars, however other scientific research has also proven that venus and Jupiter had also been visisted by several probes every 200 - 400 years. mars however is often visited by probes every 50 - 100 years.
Uranus is the blandest-appearing planet as revealed visually by space probes.
At current we have sent, or are sending, probes to all of the planets in our solar system. The probe Voyager has visited several planets, including Jupiter and Neptune, while Cassini is currently in orbit around Saturn.