Fig9_8 Polarized starlight

Fig9_8 Polarized starlight

Fig. 9.8 . The light from nearly 7,000 stars is polarized, with the strength and direction of polarization designated by the short lines. The observations are plotted in galactic coordinates where the galactic plane, or the Milky Way, runs horizontally across the middle of the figure. The starlight polarization has been attributed to dust grains elongated along the interstellar magnetic field. (Courtesy of D. S. Mathewson.)

Copyright 2010, Professor Kenneth R. Lang, Tufts University