Named in honor of Louis J. Lanzerotti, American space physicist, on the occasion of his completion of six years as chair of the U.S. National Academy of Sciences Space Studies Board. Lanzerotti helped lay the experimental foundation of our understanding of energetic particles and waves in the Van Allen Belts and in the earth’s magnetosphere, and his measurements of solar energetic particles elucidated their propagation in the interplanetary medium and solar corona. His experiments on proton bombardment of ices were applied to spectroscopic characteristics of interstellar grains, comet nuclei, asteroids and icy satellites in planetary magnetospheres, and he showed that the dark color of some of these objects resulted from interactions with particulate radiation. (M 23792) _ _.