None actually "trade orbits", although there are times when the highly elliptical orbit of Pluto brings it closer to the sun than Neptune. At other times, it is farther away. Recently, Pluto has been demoted from the status of "planet". Copy and paste link for more information. http://www.windows.ucar.edu/tour/link=/pluto/pluto_orbit.html
The two planets with overlapping orbits are Neptune and Pluto. These are the only two planets that have overlapping orbits.
No they do not cross and they do not leave their orbit, which means the state it has been right now will last forever.
All the planets have orbits so four cannot be picked out.
The elliptical orbit of planets is a result of the gravitation of the sun and the tangential velocity of the planet.
It was Kepler who discovered that the planets orbits are elliptical.
The two planets with overlapping orbits are Neptune and Pluto. These are the only two planets that have overlapping orbits.
The forces of gravity between two masses are the cause of all orbits.
Mars and Jupiter.
Technically speaking, the asteroid belt doesn't "run through" any planets but between two planets. As such, the asteroid belt is located between the orbits of Mars and Jupiter.
Mercury and venus.
Pluto and Abby University
The planets revolve in elliptical orbits. The inner planets have orbits 230 million km or less from the Sun. The outer planets have orbits 775 million km or greater.
The planets orbits are the routes or paths that the planets follow around our sun. One orbit is one trip around the sun (one year).
Gravity and inertia.
Two. Mercury and Venus
No they do not cross and they do not leave their orbit, which means the state it has been right now will last forever.
Different planets have different orbit lengths because of their distance from the sun. Planets closer to the sun have shorter orbits, and planets farther away have longer orbits.