The phenomenon by which the extinction of blue light by interstellar matter is greater than the extinction of red light so that the redder part of the continuous spectrum is enhanced.
A change in the color of an object, caused by selective absorption of its light by material lying between it and the observer, in which shorter wavelengths are more affected than longer wavelengths. As in the reddening of the light of the Sun and Moon when they are near the horizon, by our atmosphere, or the reddening of the light of distant objects by clouds of interstellar gas and dust.
the preferential scattering of the shorter wavelengths of light as it passes through a dust cloud, so that a large fraction of the bluer wavelengths of light are scattered away from your line of sight while a large fraction of the redder wavelengths of light make it through the dust cloud unaffected. Dust clouds in space make stars behind the dust clouds appear redder than they would be if the dust was not there.
Dimming of starlight by interstellar matter, which tends to scatter higher-frequency (blue) components of the radiation more efficiently than the lower-frequency (red) components.
The reddening of starlight passing through interstellar dust, caused because dust scatters blue light more effectively than red.
see interstellar reddening.
The preferential scattering or absorption of blue light by small particles, allowing more red light to pass directly through.
The phenomenon of the trailing hemisphere of a planetary body being darker at shorter wavelengths ("redder") than the leading hemisphere. This effect may be due to magnetospheric bombardment acting preferentially on the trailing hemisphere and impact gardening on the leading hemisphere. Of the Galilean satellites, Europa displays this effect most prominently, and Ganymede to a lesser extent.