Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010dps....42.2110w&link_type=abstract
American Astronomical Society, DPS meeting #42, #21.10; Bulletin of the American Astronomical Society, Vol. 42, p.987
Astronomy and Astrophysics
Astronomy
1
Scientific paper
Exploration of the internal structure and properties of the Moon continues. Existing information from gravity field, tides and 3-dimensional orientation includes moments of inertia, mean density, tidal Love numbers, tidal dissipation, and fluid-core/solid-mantle interactions from dissipation and oblateness. Tracking orbiting spacecraft gives gravity field and a Love number k2. Lunar laser ranging (LLR) determined tides and orientation give Love numbers k2 and h2, four tidal dissipation and two fluid-core/solid-mantle effects. Spacecraft gravity and LLR combined give the moment of inertia of the solid Moon, currently estimated to be 0.3929 MR2. The detections of the two core/mantle boundary effects require a fluid core. Love numbers are becoming accurate enough to constrain deep interior models for fluid core and deepest mantle. Future possibilities include (LLR) determination of the fluid core moment and a (GRAIL and LLR) search for a solid inner core. Interior explorations would be much expanded by a network of geophysical landers.
Boggs Dale H.
Noda Hirotomo
Williams James G.
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