Ray system they have been identified on Mars in infrared images taken from orbit by "2001 Mars Odyssey"s thermal imager. Rays appear at visible, and in some cases infrared wavelengths, when ejecta are made of material with different reflectivity (i.e., albedo) or thermal properties from the surface on which they are deposited. Typically, visible rays have a higher albedo than the surrounding surface. More rarely an impact will excavate low albedo material, for example basaltic-lava deposits on the lunar maria. Thermal rays, as seen on Mars, are especially apparent at night when slopes and shadows do not influence the infrared energy emitted
Albedo One "The Mammoth Encyclopedia of Science Fiction", notes that "Recent issues have boasted a printed cover, but the magazine still contains a black-and-white photocopied interior" and could "from the purely aesthetic point of view, benefit from some enhanced production values". The entry continues to note that "the editorial and literary quality of the contents more than makes up for this". However, Mann's inclusion of some genre magazines like "Albedo One" as opposed to other available magazines earned some criticism from reviewers, with one reviewer from the online edition of The Zone commenting that "Ireland's "Albedo One" rates a plug... But where