Fast and Slow Winds

Fast and Slow Winds

. A composite picture of an ultraviolet image of the solar disk and white-light image of the solar corona form a backdrop for a radial plot of solar-wind speed versus latitude. These velocity data, obtained by the Ulysses spacecraft between 1991 and 1996, show that a fast wind escapes form the polar regions where coronal holes are found, while a slow wind is associated the Sunís equatorial regions that contain coronal streamers (Courtesy of the Ulysses mission. It is a project of international collaboration between ESA and NASA.)

Copyright 2010, Professor Kenneth R. Lang, Tufts University