In sun earth system, if the sun is attracting the earth why does the earth not fall into the sun perfect answer

 If we use inertial frame of reference-  the force of attraction creates an acceleration to the sun and that acceleration with initial velocity of the the earth ensure that earth goes in a circle. Radial acceleration is zero

If we use rotating frame -  the earth is at rest, not faaling into the sun because the force of attraction is balanced by the centrifugal force.