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
What a Beautiful Name What a Beautiful Name "What a Beautiful Name" is a song by Australian praise and worship group Hillsong Worship. The song, written and led by Brooke Ligertwood and co-written with Ben Fielding, refers to the promise of salvation through Jesus Christ as represented by His Holy Name. The "genre-smashing single" contributed to Hillsong being named "Billboard"s Top Christian Artist of 2017. "What a Beautiful Name" won two Dove Awards for Song of the Year and Worship Song of the Year in 2017. It won the 2018 Grammy Award for Best Contemporary Christian Music Performance/Song. "What a Beautiful Name" was released