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Pluto is the farthest planet from the sun and therefore has the most distant object to orbit the sun. However, scientists are continually discovering new objects in the outer space.
A planet or comet's orbit that is farthest from the sun is called the aphelion. This is the point where they are at their greatest distance from the sun in their elliptical orbit.
It's called an APHELION
The plane with the smallest orbit is Mercury, and the planet with the largest orbit is Neptune.
Pluto's highly elliptical orbit sometimes brings it closer to the sun than Neptune. Though it should be noted that since Pluto is no longer considered a planet, the furthest planet from the sun is Neptune.
If you mean "why don't they orbit other objects in our Solar System", the Sun has most of the mass in our Solar System.
This is the Perihelion. The aphelion is when it is at it's most distant point.
The third most distant planet from the sun is Earth. It orders from Mercury, Venus and then Earth. The answer would then be Tellurium.The planets that orbit the sun are constantly moving in orbit and therefore getting closer and further apart from each other. Therefore, the third most distant planet from the Earth is changing as the years pass.For a complete list of elements named after planets, seehttp://wiki.answers.com/What_elements_are_named_after_a_planet
Any object with greater mass than another can cause the lesser object to orbit it. Most of our comets come from the Oort Cloud, beyond Pluto, and they orbit our Sun.
Sedna is a trans-Neptunian object, meaning it is located beyond Neptune in the outer region of the Solar System. Its elongated orbit takes it as far as 937 astronomical units (AU) from the Sun at its most distant point.
Sedna takes approximately 11,400 years to complete one orbit around the Sun. This distant object in the solar system has a highly elliptical orbit, which brings it far from the Sun at its aphelion and closer at its perihelion. Its long orbital period is a result of its significant distance and the gravitational influences of other celestial bodies.
A bound orbit is a closed path around the Sun where an object is gravitationally bound to the Sun, like the planets in our solar system. An unbound orbit is when an object travels past the Sun once and does not return, like a comet that enters the solar system from afar and leaves after its close approach to the Sun.