Albedo is a term used in astronomy to describe the reflectivity of a celestial body. It is usually expressed as a percentage, and is calculated by dividing the amount of light reflected by the amount of light that hits the surface. The albedo of Earth's surface is around 30%, meaning that 30% of the light that hits the surface is reflected back into space. The RIND of a celestial body is the outermost layer, and is often composed of dust, gas, or ice. Therefore, the RIND of a celestial body can affect its albedo, as it will determine how much light is reflected back into space.