Neptune - the furthest planet has been reached by a probe called Voyager 2, which was launched in the 70''. It flew by all four gas giant planets in the 70's and 80's(Jupiter, Saturn, Uranus and then Neptune). It is now on its way out of the solar system.
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The third farthest planet is Saturn. The first farthest is Neptune.
The farthest humans have ever gotten from Earth would be the vicinity of the Moon during the Apollo program. This would be around 370 000 km.
Mars is the inner planet farthest from the Sun.
It was Pluto when Pluto was considered a planet. Now the farthest planet is Neptune, and it's always the farthest planet.
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A satellite in a closed orbit has the greatest speed when it's closest to the planet, and the lowest speed when it's farthest from the planet.
In general the farthest point in a satellite's orbit from its focus is its apoapsis. If the focus is the Sun or Earth however then you would say the satellite's farthest point is its aphelion and apogee, respectively.
The next-to-farthest planet is Uranus.The farthest planet is Neptune.
The smallest is MercuryThe farthest is Neptune
The Earth is the 6th farthest planet from the Sun. Neptune is the farthest.
Neptune is the farthest planet and Mercury is the closest planet.
The third farthest planet is Saturn. The first farthest is Neptune.
The eighth farthest planet from the Sun is Mercury. The first farthest is Neptune.
The farthest humans have ever gotten from Earth would be the vicinity of the Moon during the Apollo program. This would be around 370 000 km.
Mars is the inner planet farthest from the Sun.
The smallest planet is mercury, and the planet farthest from the sun is Neptune.