The Planet Dweller
by Jane Palmer
Diana hears the voice of Moosevan, an entity who inhabits a distant planet, in her head. Her world is threatened and she wants Diana’s help. Yuri believes her, though he's usually drunk in charge of a ten inch reflector and has a bizarre theory about the movement of the asteroids.
Then two cosmic intelligences decide to help. They may understand the Universe, but mere mortals are beyond them.