Easy Journey to Other Planets by A. C. Bhaktivedanta Prabhupada,

Encompassing the systems of sankhya, astanga and bhakti, this absorbing publication treats the science of yoga, particularly in its application to out-of-body travel. One can attempt to go to any planet hesires, but this is only possible by psychological changes in the mind or by yogic powers. Mind is the nucleus of the material body.