  Laser pulses fired at retroreflectors on the Moon provide very accurate
ranges. Analysis yields information on Earth, Moon, and orbit. The highly
accurate retroreflector positions have uncertainties less than a meter. Tides
on the Moon show strong dissipation, with Q=33 \pm 4 at a month and a weak
dependence on period. Lunar rotation depends on interior properties; a fluid
core is indicated with radius ~20% that of the Moon. Tests of relativistic
gravity verify the equivalence principle to \pm 1.4 x 10^{-13}, limit
deviations from Einstein's general relativity, and show no rate for the
gravitational constant $\dot{G}/G$ with uncertainty 9 x 10^{-13} 1/yr.
