Astrophysical Observations of Polarized Stars and Nebulae.
Final rept. 1 Apr 68-30 Jun 71,
HARVARD COLL OBSERVATORY CAMBRIDGE MASS
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In the last 39 months, numerous measurements of the degree of optical polarization of the light emitted by a wide variety of astronomical sources have been made. These data have led to a better understanding of the surface properties of asteroids and satellites, of the nature of the interstellar grains, and the characteristics of planetary nebulae, quasars, and pulsars. The results have been extended by observations of other types, primarily spectrographic. Author