Albedo formula_5 (also called blue-sky albedo) can then be given as: Directional-hemispherical reflectance is sometimes referred to as black-sky albedo and bi-hemispherical reflectance as white-sky albedo. These terms are important because they allow the albedo to be calculated for any given illumination conditions from a knowledge of the intrinsic properties of the surface. The albedos of planets, satellites and minor planets such as asteroids can be used to infer much about their properties. The study of albedos, their dependence on wavelength, lighting angle ("phase angle"), and variation in time comprises a major part of the astronomical field of photometry. For small
Albedo One emotion... I don't think we've ever published a story nobody disliked and I doubt (hope) we ever will." The overall approach to selection of fiction for publication in "Albedo One" has been commended by one reviewer by stating that "while other publishers strain to adhere to self-imposed deadlines, Albedo One embraces a publishing schedule dictated by its gradual accumulation of quality material - material that mixes first time writers with established professionals, and that demands an audience." "For the main article see Aeon Award" Since 2004 "Albedo One" has sponsored the Aeon Award, a fiction contest aimed at promoting new