Poster Topic:
Abstract:
We carried out multi-band (U, B, V, R, and I passbands) polarimetric observations of the whole near side of the moon from the Lick observatory using a 15-cm reflecting telescope. Polarization of the light scattered by the lunar surface contains information on the mean particle size of the lunar regolith, which gradually decreases by continued micro-meteoroid impact over a long period and thus is an age indicator of the surface. We present a map of the mean particle size for the whole near side of the moon. We also compare our observations with the computer simulations and laboratory experiments that we recently began to conduct.