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All of the eight planets have been visited or orbited by space probes.
Pluto will be visited by the spacecraft New Horizon in 2015
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.
Currently no clear pictures if any dwarf planet exist, as none have been visited by a spacecraft. In 2015, however, the New Horizons spacecraft will fly by Pluto, and the Dawn spacecraft will enter orbit around Ceres.
Voyager 2 is the only spacecraft to have currently visited both.
No spacecraft has visited all the planets.
Yes, that is why all space craft are constructed in clean rooms prior to being sent to other planets
Depends on whether you say Pluto is a planet or not. If you say it isn't, then there are no planets that haven't been visited by a spacecraft. If you say it is, then there is one that hasn't been visited yet, but one is on the way.
All of the eight planets have been visited or orbited by space probes.
venus was the first planet visited by the American spacecraft
All 8 of the planets in our solar system have been visited by spacecraft, either fly-bys, or actual landings. The dwarf planet pluto has yet to be visited, but a space probe called New Horizons is on its way and should reach Pluto in 2015.
No human has really visited any planet other than Earth; the Moon isn't a planet. However, spacecraft have visited other planets, such as the Spirit and Opportunity rovers, who went to Mars
Pluto will be visited by the spacecraft New Horizon in 2015
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.
Yes, the Voyager 2 probe visited all four gas giant planets; Jupiter, Saturn, Uranus and Neptune. It flew by Neptune in 1989.
no
Currently no clear pictures if any dwarf planet exist, as none have been visited by a spacecraft. In 2015, however, the New Horizons spacecraft will fly by Pluto, and the Dawn spacecraft will enter orbit around Ceres.