Hi All Just wondering, but how much starlight from the Galaxy is there away from any star? How cold can a body in interstellar space get with a zero albedo? And I don't mean inside an opaque cloud, but in the relative emptiness between the stars? Milan Cirkovic & Robert Bradbury have speculated that super-advanced Civilizations might move to the Galactic Halo to make best use of the cosmic heat-sink. Just how much energy would they get from the Galaxy's light?