Ultraviolet image obtained by the space telescope Hubble (NASA/ESA) 24 January 1995.In ultraviolet light, the structures within the clouds become much more visible. One can see, for example, a horizontal structure in the shape of a Y near the equator. Similar structures were seen by the Mariner 10 and Galileo probes. The structure would indicate the presence of atmospheric waves, similar to cells of high and low pressure on Earth.
Clouds at high latitudes seem to follow lines at the same latitude. Darker regions show regions of clouds with higher quantities of sulphuric acid at the top of the clouds.