Dynamic Planet: Mercury in the Context of Its Environment by Pamela Elizabeth Clark
By Pamela Elizabeth Clark
We are in a time of transition in our figuring out of Mercury. Of specific curiosity this is the rising photograph of the planet as a approach, with interactions among inside, floor, exosphere, and magnetosphere that experience stimulated and limited the evolution of every a part of the approach. earlier books have emphasised the result of Mariner 10 and present ground-based measurements, with little or no dialogue of the character and impact of the magnetosphere. This publication will current the planet within the context of its atmosphere, hence delivering a starting place for the following significant inflow of data from Mercury and contributing to the making plans for destiny missions.
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Extra resources for Dynamic Planet: Mercury in the Context of Its Environment
D. H. Zurbuchen, The MESSENGER mission to Mercury: scientific payload, Planet. Space Sci. 49, 1467-1479, 2001. , M. Novara. And G. Scoon, BepiColombo: an interdisciplinary mission to a hot planet ESA Bul. No. 103, 10−19, 2000. L. E. H. N. N. R. H. Cheng, G. W. M. E. L. J. J. S. A. E. G. I. T. Zuber, The MESSENGER mission to Mercury: scientific objectives and implementation, Planet. Space Sci. 49, 1445-1465, 2001. 14 SOME QUESTION FOR DISCUSSION 1. What surprises and unresolved issues did the Mariner 10 mission leave in its wake?
The picture is far from complete for a body as dynamic as Mercury. Mercury apparently has an active dynamo implying some level of geothermal activity. The planet interacts dynamically with its rapidly changing surrounding environment. The exosphere and magnetosphere processes are dynamic with the interior, surface, solar wind and exosphere generated plasmas acting as modifying agents, sources, and sinks. All these conditions imply temporal changes and have led us to use a system of systems approach to studying Mercury.
6 45 SEARCH FOR A LIQUID CORE/SHELL Observations that can determine the existence of a fully liquid core, or the extent of a liquid shell about the core, in Mercury’s interior were described by Peale (1976, 1988) who demonstrated that measurement of the obliquity of the lowest degree gravitational harmonic coefficients and of the physical librations about the commensurate spin rate allow the extent of any liquid component to be identified. For the experiment to succeed, it is necessary that the core does not follow the 88 day physical libration cycle of the mantle but rather follows the mantle on the time scale of the 250 x103 year precession of the spin.