A force called gravity.
The gravitational pull of the sun keeps them in orbit and their moons (if they have any) are slowing down their rotation on their axes until they rotate at the same speed as each other like Pluto is already.
For the sake of curiosity Earth's moon is rotating the same speed as its orbit, and it will take twice the age of the solar system for the Earth's rotation to synch with the moon's orbit.
There path is not imaginary, so the answer is no.
Each planet moves in its own elliptical orbit round the Sun, then and now.
Yes, each of the 8 major planets has its own orbit, with no asteroids or other objects in its path.
Their own gravity disables them to lose path in their orbit and makes their path steady.
The path on which planets travel is called their orbit.
The gravity of there star keeps them on path and a planets moon is sun around by its planets gravitational force
The path a planet takes is called an orbit.The planets are kept in orbit by the gravitational pull of the star (in our case the Sun) they orbit.
Planets rotate around the sun. The path is not really circular for planets, it is actually ellipsoidal.
Planets travel in elliptical orbits.
It is the abiltity of body to be in a state of direction of motion .for example sun holds planets in a fixed elliptical path .this is one of the example of inertia of direction.
The sun's gravity holds the planets in their orbits. It also holds other space objects in their orbits, such as asteroids.
Gravity :) (Gravity also holds the outer planets tightly to the Sun.)