PLANETOID STRING SOLUTIONS IN 3-AXISYMMETRICAL SPACETIMES(1)

The string propagation equations in axisymmetric spacetimes are exactl y solved by quadratures for a planetoid ansatz. This is a straight non oscillating string, radially disposed which rotates uniformly around t he symmetry axis of the spacetime. In Schwarzschild black holes, the s tring stays outside the horizon pointing towards the origin. In de Sit ter spacetime the planetoid rotates around its center. We quantize sem iclassically these solutions and analyze the spin/(mass(2)) (Regge) re lation for the planetoids, which turns out to be nonlinear.