text: From wikipedia:\n\n"Centrifugal force (from Latin centrum "center" and fugere "to flee") is a term which may refer to two different forces which are related to rotation. Both of them are oriented away from the axis of rotation, but the object on which they are exerted differs.\n\nThe reactive centrifugal force is the reaction to the the centripetal force. This is equal in magnitude to the centripetal force, directed away from the center of rotation, and is exerted by the rotating object upon the object which exerts the centripetal force. As it is an actual force, it is always present, independent of the choice of reference frame. "\n\nIn terms of the earth's rotation about the sun, the magnitude of earth's centrifugal force is the gravitational attraction between the earth and sun.  Its direction is the vector from the middle of the sun to the middle of the earth (actually, from the center of gravity of each).\n\nIn terms of an object on the earth's surface or in orbit about the earth, the centrifugal force is, again, equal to the force of gravitational attraction between the earth and the object.  The direction of the force is from the earth's center through the object.