  The Lane-Emden equation has been used to model several phenomenas in
theoretical physics, mathematical physics and astrophysics such as the theory
of stellar structure. This study is an attempt to utilize the collocation
method with the Rational Chebyshev of Second Kind function (RSC) to solve the
Lane-Emden equation over the semi-infinit interval [0; +infinity). According to
well-known results and comparing with previous methods, it can be said that
this method is efficient and applicable.
