Complete darkness in the atmosphere, resembling a void entirely devoid of light, is theoretically possible under specific conditions. For example, if an observer were located in deep space, far from any stars or galaxies, the ambient light would be minimal, resulting in an experience approaching absolute blackness.
Understanding the potential for atmospheric darkness aids in calibrating astronomical instruments and interpreting observations of faint celestial objects. Historically, observations of exceedingly dark skies have been vital for identifying previously unknown astronomical phenomena. Accurate assessment of minimal light conditions is beneficial for advancements in dark matter research and sensitive optical experiments.