Pioneer Venus Orbiter in 1979
04 JUN. 2004 publication date 70 Views

An ultraviolet image of Venus's clouds as seen by the Pioneer Venus Orbiter from 26 February 1979.

The immense C- or Y-shaped features which are visible only in these wavelengths are individually short lived, but reform often enough to be considered a permanent feature of Venus's clouds.

The mechanism by which Venus's clouds absorb ultraviolet is not well understood.