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According to Wikipedia, there is no such planet.
The amount of substance of a planet is measured in kilograms, a unit of mass. In this sense, there is no difference between one planet and another. It doesn't make much sense to speak about the "weight" of a planet, but you can measure the attraction between a planet and another object in units of force, i.e., in Newtons.
Pluto is not a planet. It is considered to be a Dwarf planet like Ceres, Eris, and Sedna.
because we (ppl.) weren't born to function on a two-dimensional planet only a one-dimensional planet.....I think...LOL!
Neptune is the 4th largest planet
jupiter
There were two, Jupiter and Saturn.
Pioneer
Pioneer 10 travelled to Jupiter in 1973. It observed the planet between December 3, 1973 and January 1, 1974.
Basically the answer is "Venus". Mariner 2 flew past Venus. Pioneer 5 explored the space between Earth and Venus.
Voyager 1 reached Jupiter in 1979, and made its closest approach to the planet on March 5, 1979.
Pioneer X was launched in 1972. It passed Jupiter at the end of 1973. After that it didn't pass near any more planets, so it's hard to give an exact answer to this question.
Nobody "invented" wind. It is a feature of the planet; it's always been here.
The Cassini-Huygens probe is there now (Cassini orbiting Saturn since 2004, Huygens lander now inoperative, landed on the moon Titan). Earlier fly-bys of the planet were by Pioneer 11 (1979), Voyager 1 (1980), and Voyager 2 (1981).
to small satelites called pioneer 10 and 11 has explored Pluto
Pioneer 10 was launched on March 3, 1972. On June 13, 1983 it crossed the orbit of Neptune and therefore became the first human-built object to reach a greater distance from the Sun than any of the planets.(Pluto was, at the time, still considered to be a planet, but that doesn't really matter as Pluto was in that portion of its orbit which lies inside the orbit of Neptune at the time; Pioneer 10 exceeded Pluto's distance from the Sun a bit earlier, on April 25, 1983.)
pioneer 2 April 16th 1973 (only a fly by) voyager 1 September 5 1977 (only a fly by) voyager 2 augest 20 1977(orbit and terrain "check out")