Cloud tops of Venus

Cloud tops of Venus

Fig. 7.2 . Clouds of sulfuric acid permanently shroud Venusí surface from view. The horizontal Y-shaped clouds near the equator move from east to west along with high-speed winds at velocities of up to 100 meters per second, circling the planet every four Earth days. This image was taken from the Mariner 10 spacecraft when it encountered Venus on 5 February 1974, using its gravitational influence to be flung on to Mercury. Similar features have been seen in violet or ultraviolet light from the Mariner 10, Pioneer Venus, Galileo, and Venus Express spacecraft, as well as from the Hubble Space Telescope. (Courtesy of NASA.)

Copyright 2010, Professor Kenneth R. Lang, Tufts University