Sudden Infant Death Syndrome (SIDS), according to a definition on the Mayo Clinic website, is the unexplained death, usually during sleep, of a seemingly healthy baby less than a year old.. The cause is still unknown, but it does not appear to be suffocation, according to the SIDS Network.
Albedo (/Ã¦lËbiËdoÊ/) is a measure for reflectance or optical brightness (Latin albedo, whiteness). It is dimensionless and measured on a scale from zero (corresponding to a black body that absorbs all incident radiation) to one (corresponding to a white body that reflects all incident radiation).
In astronomy, the geometric albedo of a celestial body is the ratio of its actual brightness as seen from the light source (i.e. at zero phase angle) to that of an idealized flat, fully reflecting, diffusively scattering disk with the same cross-section.